This is very simply preamplifier module with 2N5109 transistor based on W7IUV design. Here is a double sided gold plated PCB designed some years ago to build some 2N5109 or 2N3866 based RF power amplifiers. For about a year I have been experimenting with extremely high intercept amplifiers using 2N5109 bipolar junction transistors (BJTs). another suitable candidate is 2n5109. The preamplifier is a tuned class-A RF amplifier and the driver is a class-C amplifier. low time OM-2000+A HF/6 meter amplifier. The amp gain, i/p and o/p in 50 ohms was therefore 20log(0. So the PGA-103+ will work as a loop amplifier, but the mismatch loss means that the noise figure and gain flatness is not as good as it really needs to be for this application. A base unit allows 12V power to be fed up an ethernet cable feeder to the antenna. Video arcade game parts, supplies, repair and technical information. My initial iteration of the amp used a transformer similar to the one in the Pennywhistle amp (this is a configuration that I’ve also successfully used before in a push-pull class-C CW amp). dan's small parts and kits. - - - Updated - - -. The design is a dual 2N5109 in push pull which increases the input and output capability as reflected in higher IOP numbers. Important is that you choose the transistor wich can dissipate upto about 30ma dc current without any problem i. A MiniCircuits ADE-1 mixer was used as RX Mixer. frequency amplifier and oscillator applications. Two RF amplifier stages, U1 and U2, provide a gain of about 32 dB. DESCRIPTION: The 2N is a silicon NPN transistor, designed for VHF and. Applications include amplifier; pre-driver, driver, and output stages. The "To +12" lead goes to a 10 ohm resistor, and then connects to a +12 power supply, as shown in the schematic below. You can also use transistor 2N5109 in place of 2N2219. The input and output impedance of the preamplifier is 50 4 for optimum perform-ance. 2N5109 2N3866 RF Amplifier PCB Module DIY KIT. It's ancient. Broadband RF Amp Description: The NTE278 is a silicon NPN transistor in a TO39 type package designed specifically for broadband applications requiring good linearity. And it comes with lots of documentation , including PCB layout. Depending on Frequency, I like BFY90, the BFR series (BRF90, BFR91, BFR96), the 2N5109 CATV transistor, but also the 2N5179 or similar. The data sheet refers to a patent that reads like a construction article. com SILICON DESCRIPTION: NPN RF TRANSISTOR The CENTRAL SEMICONDUCTOR 2N5109 is a Silicon NPN Epitaxial Planar RF Transistor mounted in a hermetically sealed package designed for high frequency amplifier applications. Build this Universal Wideband small signal RF Amplifier Specs: Greater than 20 dBm power gain from 2-30 MHz See this link for more details The Kit does not include the optional attenuator resistors. 0dB Typ @ f = 200MHz. Amplifiers with an L-match tuned input shouldn't follow a diode ring mixer unless preceded with a diplexer since the narrow-band L-match tunes only 1 frequency. Usable as a high frequency current mode switch to 200mA. Transistor Power Gain Voltage Frequency Mode Case Pin 123; MRF134: 5W: 14dB: 28V: 30-225MHz: FM/AM/SSB MRF136: 15W: 16dB: 28V: 30-225MHz: FM/AM/SSB MRF148A. Transistors tried that worked better included the TO18 2n2222A, 2n3866, and 2n5109. However, the magazine is no longer selling that amp. sertion loss is about 2 dB. There are many radio circuits and plenty of guides of how to bias transistors and different amplifier configurations but not so much on selecting the right components for high frequency applications. Uses grounded-gate CP643 preamp having high dynamic range,2N5109 oscillator injection amplifier, and 3N200 IF amplifier in combination with Minilabs SRA3H double-balanced mixer. Construction RF linear hybrid amplifiers utilize the thin film manufacturing and construction techniques developed for the demanding CATV industry. dan's small parts and kits. The base unit also has a two way splitter to provide two separate RF outputs. Applications include amplifier; pre-driver, driver, and output stages. TEST CONDITIONS. The transformer has 250µH per coil and it is useful for a broadband-amplifier. Third-order intercept point is +30 dBm. 2N5109 Datasheet, 2N5109 PDF, 2N5109 Data sheet, 2N5109 manual, 2N5109 pdf, 2N5109, datenblatt, Electronics 2N5109, alldatasheet, free, datasheet, Datasheets, data. 5 4600 3 25 150 to-72 mrf904 npn 450 1. pdf Size:488K _central 2N5109 www. This amplifier is broadband from about 0. But in Trask's curves, these devices do not look amongst the best. Mittailinpa minäkin ajankuluksi laatikosta löytyvien 2N5109-trankkujen hfe:t pilipalimittarilla. This high gain level is needed to over-come the first-mixer noise. This is a four board set to build a 8W RF output CW 20 meter transceiver that is VFO controlled. We need the gain again to be more stable and higher as well. I swapped the 0. I shall scrap the 2N5109 idea, after I just finished the PCB layout. This one is designed to amplify the 20KHz to >30 MHz range, uses the premium J310 FET and 2N5109 CATV bipolar transistors, giving a good combination of low thermal noise, gain and IMD resistance. The mixer is followed by a 2N5109 amplifier. band 2 amplifier. 7 Note that these are built directly on the board using “ugly” construc-tion. Googling "2N5109 amplifier" produces an abundance of ideas, including one from SV1AFN, "A General Purpose 2N5109 Amplifier, Use it as a receive pre-amp,. The 10811 production engineers searched for a long time for a low noise buffer amplifier and settled on the ANZAC AMC-123. Whip und Loop Aktive Antennen für den Empfang G. May someone can point me in the right direction. 2N5109 2N5109 Silicon NPN Transistor Broadband RF Amplifier Description: The 2N5109 is a silicon NPN transistor in a TO39 type package designed specifically for broadband applications requiring good linearity. Der auf vielen Seiten noch angegebene Transistor vom Typ 2N5109, wurde bereits vor Jahren, immer wieder von einem deutlich besseren und rauschärmeren Typen ersetzt. Symbol Name. SPICE Models 2N5109-5179. First step was to debug the PA and driver stages. I made a lot of amplifier modules for different frequency bands and power levels. To bring the level of the VFO to around 5mW, I cascaded two such amplifiers, based on the cheap plastic versions of the 2N2222 BJTs. I don’t have any 2N5109’s, so I’ve simply used S9014 with only a 270MHz gain bandwidth product, although of the stock I have on hand, an S9018 (800 MHz) might have been a better choice. A CATV transistor like the 2N5109 would do for most of the gain, and a FET input stage would handle impedance transformation. The answer to this conundrum is that these amplifiers were designed around 24v power supplies. The most important part of this design in my opinion is the transformer and working state of the transistor 2N5109. Apart from the power supply happily. W7IUV 2N5109 Preamp Comments: W7IUV 2N5109 Preamp Comments: WA1ION & K6SE Q&A: W7IUV Compares Low Noise Antennas: Room for 4 Pennants- Part 1: K9AY Comments-Rx Loop Families: K9AY Comments-Rx Loop Families: Room for 4 Pennants- Part 2: Waller Loop NX4D & N4IS: Waller Loop NX4D & N4IS: Flag Pennant Feedline Routing: N3OX Small (7x14ft) Rotary. It is also suitable for oscillator and frequency-multiplier functions. 0 1 2N5109/2N3866 Low-noise Broadband HF Pre-amplifier Thank you for choosing my KIT for building a very nice HF amplifier. 2N5109 somewhere in the middle. Construction. Description 2N4401 Low Noise NPN. Unfortunately noise figure is not that good for a GAsFET, probably because of the very large input. AD797AN quality op amp N. 2N3020 NPN 140V / 1. Overall it's working well, but the sensitivity isn't as great as I expected. A number of other transistors are suitable for the post mixer amplifier circuit such as the 2N5109, 2N3553, 2N5943, BFR-94 and for a SM transistor try the NE46134. Third-order intercept point is +30 dBm. 5 50 6 13 1600 1 15 40 to-39 mrf517 npn 300 7. This is very simply preamplifier module with 2N5109 transistor based on W7IUV design. X 1-3/16 in. 10MHz 2N5109 Noise Figure Measurement 10MHz 2N2219A Noise Figure Measurement Common Emitter Transformer Feedback Push Pull Amplifier. 2) whereA 0 d andA 0cm are,respectively,thedifferentialandcommon-modegainsofthe op amp at dc. In my "cheap and easy all HF bands transceiver" I have designed a small buffer based around a 2N2222 or a 2N5109 transistor, that is easy to build, broadband, does not require a transformer, can drive 50 ohm loads and has a low harmonics content in the range of -35dBc to -40dBc. Information on using the program and simulating the amplifier can be found at "Simulating Circuits and Systems with Serenade SV", by David Newkirk, W9VES, January 2001, QST, Page 37. Order) 40290 scr transistor. __ Designed by Web David White, WN5Y __ Designed by Web David White, WN5Y. RF Engineering & Ham-Radio PCB Modules and DIY KITs - Antennae - Audio HiFi - Connectors - Crystals - DC Power - Diodes - Ferrite Toroidal Cores - Filters - Frequency Converters - GNSS - Inductors -Integrated Circuits - LNAs - LoRa chips - PCB Art items - New Product Design Services - Project Boxes - RF Attenuators - RF Cables - RF Mixer - RF. The BFG591 is now obsolete and the BFU590 is a good replacement. RF linear hybrid amplifiers utilize the thin film manufacturing and construction techniques developed for the demanding CATV industry. Page 10 MFJ cub QRP CW Transceiver Operation Manual IC Voltages 13. com Vishay Semiconductors Rev. To provide adequate LO drive, the incoming 10MHz source is routed to a custom amplifier PCB (NO3M design), consisting of a SV1AFN based 2N5109 amplifier circuit, 10 MHz LPF, and a 0 degree hybrid splitter (Mini-Circuits LRPS-2-1). It works perfectly. I suspect a later variation. All ceramic substrates are alumina (A1203) with gold conducting paths. To bring the level of the VFO to around 5mW, I cascaded two such amplifiers, based on the cheap plastic versions of the 2N2222 BJTs. 1 Hlavní smy čka Jak už bylo řečeno v úvodu, obvod hlavní smy čky je odvozen z vlnové délky λ (zpravidla. com Vishay Semiconductors Rev. Second best was tie between a single 3866 and two 2n2222. Applications include amplifier; pre-driver, driver, and output stages. An amp built using a 2N5109 can have a noise figure in the 2. Googling "2N5109 amplifier" produces an abundance of ideas, including one from SV1AFN, "A General Purpose 2N5109 Amplifier, Use it as a receive pre-amp,. NE602 Spice model? 7. Both of the above transistors are readily available from several mail order sources. 15w 10mhz ge-p. These are pretty standard batteries and I have just got another spare one from my local radio store for just £6. 2N5109 PDF - Visit our website at or contact our factory direct. 2N5109 push-pull RF amp transformers ? Discussion in 'General Technical Questions and Answers' started by AA7EJ, Mar 28, 2016. To provide adequate LO drive, the incoming 10MHz source is routed to a custom amplifier PCB (NO3M design), consisting of a SV1AFN based 2N5109 amplifier circuit, 10 MHz LPF, and a 0 degree hybrid splitter (Mini-Circuits LRPS-2-1). It should. Limit the current to 10ma and garden variety BC549c can do the job for you. This amplifier is broadband from about 0. 14 The measured waveform generated by 2N5109. That gave me a high gain amp on one side, and a low noise lower gain amp on the other; a nice combo. This PCB is for 5N5109 or DCP68 transistors. The 2N5109 is a silicon NPN transistor, designed for VHF and UHF equipment. It's ancient. Much cheaper than the 2N5109 and a bit more sturdy that the 2SC5551AF-TD-E. For the BF199 transistor, possible substitutes would be 2N5109, BC547 or 2SC945. Transistor choices are equally uncritical, with a 2N5109 at Q1 and a 2N3906 at Q2 in my version of the circuit. Die meisten im Internet kursierenden Vergleiche, beziehen sich in der Regel auf den ersten Transistortyp (2N5109) und sind somit längst obsolet. It runs off 12vdc and draws 40ma current. This device is not designed for power, and I'd be extremely sceptical that you could get any where near to the quoted 0. __ Designed by Web David White, WN5Y __ Designed by Web David White, WN5Y. 74 kB) A High-Efficiency 400 Watt 13. So I figured that left the output network. Marian - 09/19/2009. The project (an amplifier) worked. The one turn loop is wound through the FT50-43 core of the 2N5109 transformer. Transistor Power Gain Voltage Frequency Mode Case Pin 123; MRF134: 5W: 14dB: 28V: 30-225MHz: FM/AM/SSB MRF136: 15W: 16dB: 28V: 30-225MHz: FM/AM/SSB MRF148A. I made mistake cut several good transistor off the board, than I had to replace it with 2N5109 or 2N5160. Over all converter gain is 37-43 dB. Build this Universal Wideband small signal RF Amplifier Specs: Greater than 20 dBm power gain from 2-30 MHz See this link for more details The Kit does not include the optional attenuator resistors. Construction RF linear hybrid amplifiers utilize the thin film manufacturing and construction techniques developed for the demanding CATV industry. May someone can point me in the right direction. The mixer is followed by a 2N5109 amplifier. I didn't turn up anything except some very recent power devices with very very high (GHz) Ft. For the 2N5109 under optimum conditions, NF can be as low as 3. How to Convert a Computer ATX Power Supply to a Lab Power Supply. The display above shows input SWR of the amplifier on the top graph, and gain on the lower graph. The W7IUV amplifier is good sof VLF and low bands. Backed by a team of well-informed experts, we are a well-known firm in the market for providing an extensive series of RF/VHF/UHF Transistor MOTOROLA/RCA TO-39 2N5109. A German ham who is getting excellent results with his told me I should look into a preamp. The most important part of this design in my opinion is the transformer and working state of the transistor 2N5109. Listed under the Technical Reference/Preamplifiers category that is about Preamp projects and notes. 5 5 6 11 4000 1 15 30. 5 6 17 900 1 12 50 to-72 2n2857 npn 300 5. This might be a good choice for anyone choosing to substitute an AD9851 module for the. net The theoretical maximum efficiency, RF power output / DC power input, is 78 percent but depends on the impedance of the plate load. All ceramic substrates are alumina (A1203) with gold conducting paths. The most prominent ones are Norton broadband amps up to 150MHz using CATV or even common medium frequency transistors (BFY90, 2N5109, 2N2219) at low, medium and high collector currents. From Greece. Notes The circuit uses two 2N3819 FET's in cascode configuration. 2C5109 Datasheet - NPN Chip Type - 2N5109 Semicoa, 2C5109 datasheet, 2C5109 pdf, 2C5109 pinout, equivalent, 2C5109 data, 2C5109 circuit, output. 4a 4w 5ma | 2n5109 si-n 40v 0. Construction RF linear hybrid amplifiers utilize the thin film manufacturing and construction techniques developed for the demanding CATV industry. Thanks to F3UE , a french ATLAS 210 GOUROU , we were able to have a copy of the article which is hard to find nowadays. 59806-3634. Formerly Ultralinear 2N5109 And 2N3053 Amplifiers Dallas Lankford, 8 VI 94, rev. I suspect a later variation. 5 4600 3 25 150 to-72 mrf904 npn 450 1. W7IUV HF preamplifier. The first was based on EMRFD Figure 2. The outermost 1” or more of the Tee is to be cut off, as is the better portion of the PVC end caps so as to make the assembly more compact. 4)I modeled (using SPICE) the front end FET preamp section of the W1FB preamp and used a 2K ohm load to simulate the input of the MC1350. 1 uF input cap with 1500 pf. Every NPN transistor I used, every one of them different, worked and I could not tell much of a difference in performance. Although a low-frequency amplifier typically has a very high input impedance and very low output impedance, most RF amplifiers will have the same impedance (usually 50 ⍀) for both input and output. 2N5109 UHF wideband high frequency amplifier NPN transistor Shenzhen Goldeleway Electronics Technology Co. semiconductor device, transistor, npn, silicon, high frequency types 2n5109 and tx2n5109 MIL S 19500/78 : C SEMICONDUCTOR DEVICE, TRANSISTOR PNP, SILICON, LOW-POWER TYPES 2N1025, 2N1026 AND 2N1469. Second best was tie between a single 3866 and two 2n2222. (GBSRBS–L 10–70 MHz)) [7]. Vy 73 de Herb - OE5BRL Herb, I've also searched for the same Spice models and also any RF power transistor models. This amplifier is broadband from about 0. 2N7002 J310 2N3904 1 2 3 4. I didn't turn up anything except some very recent power devices with very very high (GHz) Ft. UNDER TESTING SEE THIS BLOG FOR. I could really use some pdf's. So likely there will be a 2N2219A amp built in front of this for the 100 mW ish drive for this driver in the next version of the amp. 2N5109,J310,MC1350,SA602,NE5532,MAX293,AD9851,16F73 & TDA1013. It says it can be substituted by a BC148. 2N5109 DATASHEET PDF - The 2N is a silicon NPN transistor, designed for VHP and UHF equipment. 2N5109/2N3866 Low-noise Broadband HF Pre-amplifier Ver. 5 4600 3 25 150 to-72 mrf904 npn 450 1. Other suggested transistors types are Q1=BD135, BD137, BD139, Q2= 2N3906, BC557, BC558, TIY050. Signals are finally fed to the class-C RF power amplifier, which delivers RF power to a 50-ohm horizontal dipole or ground plane antenna. W7IUV Beverage Pre-Amp (2N5109) | Contesting & SDR In preparation of the upcoming CQWW 160m Contests my friend Hannes, DK1NO was so kind to give me one of his W7IUV broadband, high IP3 preamplifier. It works perfectly. A 2N5109 feedback amp gives needed gain plus a well-defined output impedance that's further boosted with a 3 dB pad. Radio Amateurs of/du Canada 720 Belfast Road, Suite 217 Ottawa, Ontario K1G 0Z5 Telephone: (613) 244-4367 Fax: (613) 244-4369 email: [email protected] 14 The measured waveform generated by 2N5109. The frequency doubler circuit does require +12 VDC to operate. 4)I modeled (using SPICE) the front end FET preamp section of the W1FB preamp and used a 2K ohm load to simulate the input of the MC1350. Page 83: Switch Functions. I shall scrap the 2N5109 idea, after I just finished the PCB layout. Note that the preamp uses 20 V (for high IMD performance) at 240 mA, or nearly 5 W. 2N5109/2N3866 Low-noise Broadband HF Pre-amplifier Ver. 2 will no longer update correctly. 14 The measured waveform generated by 2N5109. 5 to more than 50 MHZ with 14 dB of stable gain and very. You can also use transistor 2N5109 in place of 2N2219. You may save a lot more than just design time. One turn is just one time through the center of the core, as shown in the image. Capacitors 34 -- 1200pF. AA7EJ Ham Member QRZ Page. I now drive it with an IC-756 through a 30dB attenuator. You can use it as high IP preamplifier for RX antennas (beverage, DHDL, flag etc. It includes a 6db output attenuator that also provides a 50 ohm output. 3MHz Noise Figure Measurement N-Gen -> 40dB Attenuator -> DUT -> 30dB LNA -> VNWA Port 2 Power = 12. Pricing and Availability on millions of electronic components from Digi-Key Electronics. The input return loss measured quite good; -15 to -20 dB across all the bands. 5W Through Hole TO-39 from Microsemi Corporation. gain for the mixer, I added a 2N5109 amplifier with a 50 ohm pad at the output, adding about 16 to 18dB of drive to the VFO. Yksittäinen toisen valmistajan yksilö näytti olevan 79. 2C5109 Datasheet - NPN Chip Type - 2N5109 Semicoa, 2C5109 datasheet, 2C5109 pdf, 2C5109 pinout, equivalent, 2C5109 data, 2C5109 circuit, output. Connectors for 12Vdc, RF in and RF out are on the back. 5 V Continuous Collector Current IC 0. Usable as a high frequency current mode switch to 200mA. 2N5109 UHF wideband high frequency amplifier NPN transistor Shenzhen Goldeleway Electronics Technology Co. Notes The circuit uses two 2N3819 FET's in cascode configuration. 2n3055 2n3773 2n5109 2n2219 mj2955 buv11 to-3/ to-39 good quality lron cap l2ks 10pcs 2N3055 NPN AF Amp Audio Leistungstransistor 15A yn 10 Stück Tranzistor 2N3055 15 A / 60v. MARKING: FULL PART NUMBER MAXIMUM RATINGS: (TA=25°C unless otherwise noted) SYMBOL UNITS Collector-Base Voltage VCBO 40 V. In front of the receiver there is an attenuator for strong local signals. DESCRIPTION: The 2N is a silicon NPN transistor, designed for VHF and. The feedback circuit is formed by RF transformer Th. Applications include amplifier; pre-driver, driver, and output stages. Here is a table to compare some old and new RF devices. COM or contact our factory direct. When you turn this control, power output will be displayed in watts, pre-amp on (approx. 2n5109 pdf Applications include amplifier; pre-driver, driver, and output stages. MARKING: FULL PART NUMBER MAXIMUM RATINGS: (TA=25°C unless otherwise noted) SYMBOL UNITS Collector-Base Voltage VCBO 55 V Collector-Emitter Voltage VCEO 30 V Emitter-Base Voltage VEBO 3. 2N5109 UHF wideband high frequency amplifier NPN transistor Shenzhen Goldeleway Electronics Technology Co. Page 83: Switch Functions. Feedback Amplifier, 13 dB Gain Input, with output terminated Output, with input terminated Output, with input open Perfect match (reference) Figure 4. One turn is just one time through the center of the core, as shown in the image. This is a bit of overkill, but it works. 5 to more than 30 MHZ with 14 dB of stable gain and very good linearity. This is a universal 1 Watt RF class C amplifier that is ideally suited for low power FM transmitters. Although a low-frequency amplifier typically has a very high input impedance and very low output impedance, most RF amplifiers will have the same impedance (usually 50 ⍀) for both input and output. The common-base amplifier is based on a UHF class A power transistor Type 2N5109 from Motorola. Other transistors might be used but I have not tested any nor can I suggest any substitutes. I swapped the 0. 2N5109 SILICON NPN RF TRANSISTOR DESCRIPTION: The CENTRAL SEMICONDUCTOR 2N5109 is a silicon NPN epitaxial planar RF transistor mounted in a hermetically sealed package designed for high frequency amplifier applications. My first attempt at the W7IUV preamp shown with the cover removed. Note that the preamp uses 20 V (for high IMD performance) at 240 mA, or nearly 5 W. It's ancient. Fast, Accurate Logging Amplifier, VIN e10V to 0. This network was added at the amplifier’s input in order to obtain a flat gain response over the entire band. This PCB is for 5N5109 or DCP68 transistors. The outermost 1” or more of the Tee is to be cut off, as is the better portion of the PVC end caps so as to make the assembly more compact. On the bench at the moment is a 45 W HF linear for US$20. 2008 10-2 Obr. The feedback circuit is formed by RF transformer Th. The most important part of this design in my opinion is the transformer and working state of the transistor 2N5109. 1N4007 diode to protect from polarity inversion. I've tried using the AD8331 chip, but I was unable to achieve its specified noise characteristics, and even if I did I'm not sure they would be good enough. At least +25dBm (3-400mW, 4-5Vrms) is needed. e metal pack So 2N3866 fits the bill perfectly. The preamplifier is described on W7IUV's website and uses a 2N5109 transistor I got from Mouser. Both transistors have a TO-39 case. On the IF output of the SBL-1 mixer is a LC diplexer network and a 2N5109 transistor-based amplifier. The one turn loop is wound through the FT50-43 core of the 2N5109 transformer. (LT-Spice) Other RF models also welcome. Norton amplifiers have an input impedance of around 2 ohms whereas the PGA-103+ has an input impedance of around 1K ohm. 74 kB) A High-Efficiency 400 Watt 13. Does any one else have a manual with circuits which use 2N5109 in the main amplifier, and another additional PCB for ?overload protection. This is a bit of overkill, but it works. RF linear hybrid amplifiers utilize the thin film manufacturing and construction techniques developed for the demanding CATV industry. This one is designed to amplify the 20KHz to >30 MHz range, uses the premium J310 FET and 2N5109 CATV bipolar transistors, giving a good combination of low thermal noise, gain and IMD resistance. Other suggested transistors types are Q1=BD135, BD137, BD139, Q2= 2N3906, BC557, BC558, TIY050. Gain is up to 18dB and there is also build in variable ATT. ixsystems changed how plugins worked for FreeNAS 11. Following the RF amplifier is a second dual-PIN-diode switch, D1. Doing this allows the circuit to have some gain (it effectively acts as an amplifier with feedback), and even to make that gain depend on the frequency. 0 A Power Dissipation (TC=25°C) PD 5. The CENTRAL SEMICONDUCTOR 2N5109 is a Silicon NPN Epitaxial Planar RF Transistor mounted in a hermetically sealed package designed for high frequency amplifier applications. UNDER TESTING SEE THIS BLOG FOR. 56 shipping. pre amplifier using a 2n5109 for the 160 meters band. Come-in the two stage amplifier I described below. sertion loss is about 2 dB. This RX Preamplifier module BOX with 2N5109 transistor is based on W7IUV design. The 2N is a silicon NPN. Amplifier should be enclosed in a metal case. Datasheet pdf search engine - www. The receiver uses a MAR-2 front end with a SRA-1 mixer in the single conversion receiver. Although several months of work produced very few suitable replacements, I did manage to fix most, if not all, design deficiencies known to be in the easy, economical way to adjust the gain on a feed back amplifier like this one without severely. The low gain of the antenna requires a preamp. I had some success with a 2SC3230 at 7MHz in a class A amplifier stage. Find many great new & used options and get the best deals for W7iuv Beverage Preamplifier PCB for Experimenters 2n5109 or Dcp68 Transistor at the best online prices at eBay! Free shipping for many products!. Transmission plot of the Norton here. To provide adequate LO drive, the incoming 10MHz source is routed to a custom amplifier PCB (NO3M design), consisting of a SV1AFN based 2N5109 amplifier circuit, 10 MHz LPF, and a 0 degree hybrid splitter (Mini-Circuits LRPS-2-1). I didn't change the 2N3866 to 2N5109; I didn't have a 2N5109 and this seemed quite uninviting to try, although it may have helped. Also suitable for oscillator and frequency-multiplier functions. Symbol Name. Third-order intercept point is +30 dBm. I made a lot of amplifier modules for different frequency bands and power levels. power amplifier 2. Page 83: Switch Functions. Googling "2N5109 amplifier" produces an abundance of ideas, including one from SV1AFN, "A General Purpose 2N5109 Amplifier, Use it as a receive pre-amp,. 1m (51″) wide with a built-in low noise high dynamic range RF amplifier. Minimum Order: The Minimun Order amount is $15. Use a heat-sink with transistor 2N3866 for heat dissipation. The input and output impedance of the preamplifier is 50 4 for optimum perform-ance. Click here for the datasheet for NTE278. X 1-3/16 in. 2W >1GHz | 2N5192 SI-N 80V 4A 40W 2MHz. Measuring the gain and response with a VNA, the amplifier has almost 24dB of gain at LF, up to 20MHz, dropping off to 14dB at 28MHz. 45 or the 2N3053 at $0. The answer to this conundrum is that these amplifiers were designed around 24v power supplies. MPSH10 was disappointing. The common-base rf amplifier is based on a UHF class A power transistor Type 2N5109 from Motorola. So I have used a small attenuator to bring the SIGGEN output down to the amplifier input level. About preamps for ham radio use category is a curation of 38 web resources on , 432MHz Low Noise Preamp, Mizuho products, The 50MHz Assistant. 2N5109 SILICON NPN RF TRANSISTOR DESCRIPTION: The CENTRAL SEMICONDUCTOR 2N5109 is a silicon NPN epitaxial planar RF transistor mounted in a hermetically sealed package designed for high frequency amplifier applications. Gain is up to 18 dB and there is also build in variable ATT. The feedback circuit is formed by RF transformer Th. This device is not designed for power, and I'd be extremely sceptical that you could get any where near to the quoted 0. The preamplifier is described on W7IUV's website and uses a 2N5109 transistor I got from Mouser. Similarly, the 2N5109 and 2N3866 often show up in places like transmitter driver stages and post-mixer amplifiers. The amplified RF is taken from the collector of the first transistor and is passed DC coupled to the input of the second amplifier stage. Input should be at least 100mW to achieve 1W output. Generic Name. There are additionally three capacitors but they do not play a role in the basic transistor amplifier design which mainly involves setting DC voltages. This pre-amp departs from previous units that I've designed and built in that, rather than a series tuned circuit to match the antenna to the FET, it uses a parallel tuned circuit with a tap for the antenna connection. The ICOM's transvertor in/out scheme was not workable without mods. 5 to more than 30 MHZ with 14 dB of stable gain and very good linearity. PathWave ADS offers market-leading circuit design and simulation software with integrated design guidance via templates to help you get started faster. Applications include amplifier; pre-driver,. And it comes with lots of documentation , including PCB layout. But the 2SC6097 would appear to be a better choice if I can get a heat-sink to suit. 10 Pieces (Min. Information on using the program and simulating the amplifier can be found at "Simulating Circuits and Systems with Serenade SV", by David Newkirk, W9VES, January 2001, QST, Page 37. The 2N5109 transistor prices are much higher than they use to be. The preamplifier is described on W7IUV's website and uses a 2N5109 transistor I got from Mouser. To provide adequate LO drive, the incoming 10MHz source is routed to a custom amplifier PCB (NO3M design), consisting of a SV1AFN based 2N5109 amplifier circuit, 10 MHz LPF, and a 0 degree hybrid splitter (Mini-Circuits LRPS-2-1). 0 1 2N5109/2N3866 Low-noise Broadband HF Pre-amplifier Thank you for choosing my KIT for building a very nice HF amplifier. 57 and used a 2N5109 transistor providing about 16 dB of gain. May someone can point me in the right direction. dan's small parts and kits. DSCC-84005 - Semiconductor Device, Rectifier, Silicon, 30 Amp, 200 and 400 Volt DSCC-94022 - Semiconductor Device, Diode, Standard Recovery DSCC-99003 - Semiconductor Device, Thyristor, Reverse Blocking, Silicon, Types 2N1792 and 2N1910 Families. For sale is BARE PCB Only. W7IUV Beverage Pre-Amp (2N5109) | Contesting & SDR In preparation of the upcoming CQWW 160m Contests my friend Hannes, DK1NO was so kind to give me one of his W7IUV broadband, high IP3 preamplifier. - - - Updated - - -. Computer power supplies cost around US$30, but lab power supplies can run you $100 or more! By converting the cheap (free) ATX power supplies that can be found in any. STANDARD 2N5109 AMP This is a single 2N5109 broadband amplifier. isolation) > than a high frequency one. There is also information about Norton feedback RF amplifiers in EMFRD. 21 V 07 For about a year I have been experimenting with extremely high intercept amplifiers using 2N5109 bipolar junction transistors (BJTs). The "To +12" lead goes to a 10 ohm resistor, and then connects to a +12 power supply, as shown in the schematic below. 2N5109 2N5109 Silicon NPN Transistor Broadband RF Amplifier Description: The 2N5109 is a silicon NPN transistor in a TO39 type package designed specifically for broadband applications requiring good linearity. com, [email protected] Information on using the program and simulating the amplifier can be found at "Simulating Circuits and Systems with Serenade SV", by David Newkirk, W9VES, January 2001, QST, Page 37. Changes: 0. Decide the output impedance of the RF Amp, 50 or 200 Ohms. This is a universal 1 Watt RF class C amplifier that is ideally suited for low power FM transmitters. amplifier) to drive a number of 50 ohm build-out resistors, or by Enclosed are the measured forward and reverse gain of that circuit with a 2N5109 and a 2N3904. So I figured that left the output network. The input/output transformer is wound on a Type FT37-75 ferrite core from Micrometals. 5 - 3dB range. Every NPN transistor I used, every one of them different, worked and I could not tell much of a difference in performance. 2N5109 push-pull RF amp transformers ? Discussion in 'General Technical Questions and Answers' started by AA7EJ, Mar 28, 2016. 2N5109 EPUB - Visit our website at or contact our factory direct. com SILICON DESCRIPTION: NPN RF TRANSISTOR The CENTRAL SEMICONDUCTOR 2N5109 is a Silicon NPN Epitaxial Planar RF Transistor mounted in a hermetically sealed package designed for high frequency amplifier applications. Shown above is the bottom one half of the dual 2N5109 amplifier. 45 or the 2N3053 at $0. 2N1005 Si npn 150mW 15V 15V - 25mA 175>C - - 10/35 AMP TO5 RLA BC107 A157 KT301B 2N1006 Si npn 150mW 15V 15V - 25mA 175>C - - 25/150 STE TO5 RLA BC107 A157 KT301B 2N1007 Ge pnp 30W 40V 30V 15V 3A 95>C 60KHz - 50/250 CSR TO3 Power General Purpose AZS16 2N1536 P216 2SB69. If you've been using transistors like the 2N3866, 2N5109, or stud mounted devices, read on. This one is designed to amplify the 20KHz to >30 MHz range, uses the premium J310 FET and 2N5109 CATV bipolar transistors, giving a good combination of low thermal noise, gain and IMD resistance. An amp built using a 2N5109 can have a noise figure in the 2. Available from Vishay Ultronix, Grand Junction, CO, Q81 Series. 3MHz Noise Figure Measurement N-Gen -> 40dB Attenuator -> DUT -> 30dB LNA -> VNWA Port 2 Power = 12. I know this is a old one, but its provide exellent data. 4)I modeled (using SPICE) the front end FET preamp section of the W1FB preamp and used a 2K ohm load to simulate the input of the MC1350. The common-base amplifier is based on a UHF class A power transistor Type 2N5109 from Motorola. 2N5109 Datasheet, 2N5109 PDF, 2N5109 Data sheet, 2N5109 manual, 2N5109 pdf, 2N5109, datenblatt, Electronics 2N5109, alldatasheet, free, datasheet, Datasheets, data. Find many great new & used options and get the best deals for W7iuv Beverage Preamplifier PCB for Experimenters 2n5109 or Dcp68 Transistor at the best online prices at eBay! Free shipping for many products!. This one is designed to amplify the 20KHz to >30 MHz range, uses the premium J310 FET and 2N5109 CATV bipolar transistors, giving a good combination of low thermal noise, gain and IMD resistance. It works perfectly. Name View Description; BC337: TO-92 grid 2. Generic Name. In my "cheap and easy all HF bands transceiver" I have designed a small buffer based around a 2N2222 or a 2N5109 transistor, that is easy to build, broadband, does not require a transformer, can drive 50 ohm loads and has a low harmonics content in the range of -35dBc to -40dBc. We need the gain again to be more stable and higher as well. For the 2N5109 under optimum conditions, NF can be as low as 3. band 2 amplifier. This amplifier is intended to be a 160-meter only amplifier. What about that amplifier? This is an evolving project and two versions were designed with separate board runs made for each. The frequency doubler circuit does require +12 VDC to operate. The amp gain, i/p and o/p in 50 ohms was therefore 20log(0. Input impedance is reasonably high, as typical of other common-emitter designs. Information on using the program and simulating the amplifier can be found at "Simulating Circuits and Systems with Serenade SV", by David Newkirk, W9VES, January 2001, QST, Page 37. If you’ve been using transistors like the 2N3866, 2N5109, or stud mounted devices, read on. Measuring the gain and response with a VNA, the amplifier has almost 24dB of gain at LF, up to 20MHz, dropping off to 14dB at 28MHz. We have developed a discrete component amplifier that is intended for use in Long Wavelength Array appli- cations. I have seen many circuits using the 2N2222 transistor (correct me if it isn't one). The final circuit I used is as follows:. The pre-amplifier circuit is from W7IUV and works with a 2N5109 transistor. isolation) > than a high frequency one. Interpreting a SPICE model test results. Datasheet pdf search engine - www. Second best was tie between a single 3866 and two 2n2222. It should. These kinds of amplifiers, known as common base transformer feedback (CBTF). The marker is at 1. Overall it's working well, but the sensitivity isn't as great as I expected. Spice model. The form factor standardized by the CATV industry allows the hybrid amplifier to be bolted directly to the chassis frame for maximum power dissipation. This is very simply preamplifier module with 2N5109 transistor based on W7IUV design. For about a year I have been experimenting with extremely high intercept amplifiers using 2N5109 bipolar junction transistors (BJTs). The feedback circuit is formed by RF transformer Th. 5W output power. I made a lot of amplifier modules for different frequency bands and power levels. Input and output impedance is 50 ohm. Applications include amplifier; pre-driver, driver, and output stages. 45 or the 2N3053 at $0. 2N5109 PBFREE – RF Transistor NPN 20V 400mA 1. 2N5109 DESCRIPTION: The 2N5109 is a High Frequency Transistor for General Purpose Amplifier Applications. Applications include amplifier; pre-driver, driver, and output stages. 0 out of 5 stars 1 $8. Depending on Frequency, I like BFY90, the BFR series (BRF90, BFR91, BFR96), the 2N5109 CATV transistor, but also the 2N5179 or similar. Build this Universal Wideband small signal RF Amplifier Specs: Greater than 20 dBm power gain from 2-30 MHz See this link for more details The Kit does not include the optional attenuator resistors. 2N5109 datasheet, 2N5109 PDF, 2N5109 Pinout, Equivalent, Replacement - NPN SILICON HIGH FREQUENCY TRANSISTOR - ASI, Schematic, Circuit, Manual. LOT OF 7, TDA1675A Vertical Deflection Circuit New Original SGS LOT OF 2, TDA7393 Original ST 2 x 32W DUAL BRIDGE CAR RADIO AMPLIFIER, TDA7240A Original ST Microelectronics Power Amplifier LOT OF 10, TDA1675A Vertical Deflection Circuit New Original SGS LOT OF 5, 6-PACK | Very Rare LUXURY JOHNNIE WALKER Gold Label Case / Gift Box, 2SC2634. A 2N5109 feedback amp gives needed gain plus a well-defined output impedance that's further boosted with a 3 dB pad. Two RF amplifier stages, U1 and U2, provide a gain of about 32 dB. SpiceMod is an easy to use program employing a simple spreadsheet format to generate accurate SPICE models from manufacturer's data sheet parameters. WINTransceiver C B E Features: Low Noise Figure: NF = 3. Decide the output impedance of the RF Amp, 50 or 200 Ohms. However, the magazine is no longer selling that amp. These have excellent specs but today cost over $2 a piece. The input/output transformer is wound on a Type FT37-75 ferrite core from Micrometals. QST - jun 2002 -dec 2005 - jan 2006. Parts The following list contains parts that are available. What about that amplifier? This is an evolving project and two versions were designed with separate board runs made for each. Indications are lastly supply to the class-C RF control amp, which carry RF control to a 50-ohm level dipole or position plane mast. It's really a nice preamp and very easy to build. For an op. It should. We need the gain again to be more stable and higher as well. You can also use transistor 2N5109 in place of 2N2219. It is designed specifically for highspeed saturated switching applications at current levels from a to ma. You must follow the winding rules as same as core material for transformer and finally you must use prescribed current of the transistor in order to reach expected performances. The actual 2N5109 input impedance is probably around 40 ohms — easy matching with an L-match network. Removing the exciter drive from the PA input and linking the keyed (buffered) si5351 clock 1 straight onto the base of the 2N5109 driver (via a coupling capacitor) gave a clean few watts of CW output. Parts The following list contains parts that are available. I now drive it with an IC-756 through a 30dB attenuator. Low cost 45W HF linear amplifier kit I can't resist the low cost electronics kits out of China these days. Measuring the gain and response with a VNA, the amplifier has almost 24dB of gain at LF, up to 20MHz, dropping off to 14dB at 28MHz. There are many radio circuits and plenty of guides of how to bias transistors and different amplifier configurations but not so much on selecting the right components for high frequency applications. When the amp was reinserted into the rx and the 50 ohm output load replaced with the mixer the gain dropped to 9. Mouser is an ECIA Authorized distributor. Input and output impedance is 50. This is a four board set to build a 8W RF output CW 20 meter transceiver that is VFO controlled. band 2 amplifier. You see it often in homebrew construction. MARKING: FULL PART NUMBER MAXIMUM RATINGS: (TA=25°C unless otherwise noted) SYMBOL UNITS Collector-Base Voltage VCBO 40 V. > > So what parameters in the transistor do affect the isolation? It is like > a low-frequency transistor offers better performance (i. MAXIMUM RATINGS IC 400 mA VCE 20 V PDISS 1. 3, a plugin installed on FreeNAS 11. Amplifiers with an L-match tuned input shouldn't follow a diode ring mixer unless preceded with a diplexer since the narrow-band L-match tunes only 1 frequency. 1m (51″) wide with a built-in low noise high dynamic range RF amplifier. Oct 29, 2018 - Explore Engsenan's board "Amplifiers" on Pinterest. You may save a lot more than just design time. The ICOM's transvertor in/out scheme was not workable without mods. 1 Piece (Min. frequency amplifier and oscillator applications. Obtaining SPICE model paramters. Usable as a high frequency current mode switch to 200mA. Second best was tie between a single 3866 and two 2n2222. MARKING: FULL PART NUMBER MAXIMUM RATINGS: (TA=25°C unless otherwise noted) SYMBOL UNITS Collector-Base Voltage VCBO 40 V. Die meisten im Internet kursierenden Vergleiche, beziehen sich in der Regel auf den ersten Transistortyp (2N5109) und sind somit längst obsolet. The feedback circuit is formed by RF transformer Th. X 1-3/16 in. The first was based on EMRFD Figure 2. Synthesizers, PLL, DDS and ADC/DAC ICs MRF9411 with MRF 9511 --- MRF517 and MRF525 with 2N5109 --- MRF580 and. Yksittäinen toisen valmistajan yksilö näytti olevan 79. The output voltage of an op amp at dc can be expressed as V 3 =A 0d (V 2 −V 1)+ A 0cm 2 (V 1 +V 2) (B. Transistor choices are equally uncritical, with a 2N5109 at Q1 and a 2N3906 at Q2 in my version of the circuit. Changes: 0. J310 Datasheet, J310 PDF, J310 Data sheet, J310 manual, J310 pdf, J310, datenblatt, Electronics J310, alldatasheet, free, datasheet, Datasheets, data sheet, datas. Transistors 16 -- 2N5109. Does anybody know of any cross reference for the old SK# to ECG or any other? I have three IC's with the #'s sk7609,sk7613 and sk7710 which I can find no mathing datasheets on them. May someone can point me in the right direction. You can easy set the gain as high as you need!. com is ideal, but I have a lot of surplus 2N2219A's in the drawer of junque. The amplifiers discussed in the article by WB9JPS reminded me of a November, 1984 article in Ham Radio magazine by Joe Reisert, W1JR 6, where various topologies of amplifiers using the venerable 2N5109 transistor are discussed- a device designed specifically for broadband, low noise, linear operation and is, more importantly, still readily. 95 MHz, on which we have a very strong local pager transmitter. So the PGA-103+ will work as a loop amplifier, but the mismatch loss means that the noise figure and gain flatness is not as good as it really needs to be for this application. 2C5109 Datasheet - NPN Chip Type - 2N5109 Semicoa, 2C5109 datasheet, 2C5109 pdf, 2C5109 pinout, equivalent, 2C5109 data, 2C5109 circuit, output. 0dB Typ @ f = 200MHz High Current−Gain Bandwidth Product: fT = 1200MHz Min @ IC = 50mA. STANDARD 2N5109 AMP This is a single 2N5109 broadband amplifier. PathWave ADS offers market-leading circuit design and simulation software with integrated design guidance via templates to help you get started faster. 1 Hlavní smy čka Jak už bylo řečeno v úvodu, obvod hlavní smy čky je odvozen z vlnové délky λ (zpravidla. They are joied together using 1" long pieces of 2 1/2" PVC pipe (not shown). e metal pack So 2N3866 fits the bill perfectly. A revision of this balun used the NE461 transistor (chosen for its more compact size and improved gain-bandwidth product) and was. The first was based on EMRFD Figure 2. Also JFETs are less noisy at low frequencies compared Bipolar transistors. 1 uF input cap with 1500 pf. The 2N5109 transistor prices are much higher than they use to be. Changes: 0. Order today, ships today. Vy 73 de Herb - OE5BRL Herb, I've also searched for the same Spice models and also any RF power transistor models. been using transistors like the 2N3866, 2N5109, or stud mounted devices, read on. We need the gain again to be more stable and higher as well. 1st & 2nd Mixer, Roofing Filter, and Post Mixer Amplifier, top view. Very good performance in a Norton amplifier running 30 ma, better performance than the 2N5109 typically used but cannot carry as much current as a 2N5109. You may save a lot more than just design time. 5-5 W and RX preamplifier. 1m (51″) wide with a built-in low noise high dynamic range RF amplifier. Amplifier should be enclosed in a metal case. First step was to debug the PA and driver stages. 1 1 10 100 Figure 1. I thought, let me try some other NPN transistors. My version uses an SBL-1 mixer. A MiniCircuits ADE-1 mixer was used as RX Mixer. Low cost 45W HF linear amplifier kit I can't resist the low cost electronics kits out of China these days. The boat battery supplied is a sealed lead acid 6 volt 4 amp hour and should give well over an hour with normal speed control use. A three section pi low pass filter (LPF) and another resistive T attenuator (not fitted in review unit) complete the RF path. 1 to 15 W for the basic K2, and 1 to ATTN attenuator in (-10 dB) 100 W if you have the KPA100 amplifier installed. W7IUV Beverage Pre-Amp (2N5109) | Contesting & SDR In preparation of the upcoming CQWW 160m Contests my friend Hannes, DK1NO was so kind to give me one of his W7IUV broadband, high IP3 preamplifier. 2n3055 2n3773 2n5109 2n2219 mj2955 buv11 to-3/ to-39 good quality lron cap l2ks 10pcs 2N3055 NPN AF Amp Audio Leistungstransistor 15A yn 10 Stück Tranzistor 2N3055 15 A / 60v. The preamplifier is a tuned class-A RF amplifier and the driver is a class-C amplifier. Doing this allows the circuit to have some gain (it effectively acts as an amplifier with feedback), and even to make that gain depend on the frequency. The common-base rf amplifier is based on a UHF class A power transistor Type 2N5109 from Motorola. From LTwiki-Wiki for LTspice. 4 1000 400. 0 A Power Dissipation (TC=25°C) PD 5. That gave me a high gain amp on one side, and a low noise lower gain amp on the other; a nice combo. J310 Datasheet, J310 PDF, J310 Data sheet, J310 manual, J310 pdf, J310, datenblatt, Electronics J310, alldatasheet, free, datasheet, Datasheets, data sheet, datas. These have excellent specs but today cost over $2 a piece. Silicon NPN, To-39 packaged VHF/UHF Transistor 1. Hallo Michael, ich verwende den 2N5109 ebenfalls in meinen Gegentakt Emitterfolgern. Connectors for 12Vdc, RF in and RF out are on the back. I didn't change the 2N3866 to 2N5109; I didn't have a 2N5109 and this seemed quite uninviting to try, although it may have helped. 45 or the 2N3053 at $0. Title: Protel Schematic Author: mkatsouris Created Date: 12/24/2013 1:28:09 PM. Capacitors 34 -- 1200pF. 75 also 2N244 xref to NTE293 AF Amp or driver squarish old transistor case NPN Si qty 5 in bin BLK1 2N244. Default is 50 ohms. Use a 2N5109 or 2N3866 with a heat-sink and lots of current. The 5109 was best even though she used only one. I am sorry but I cannot be responsible for a normal. 0dB Typ @ f = 200MHz. When using a low frequency device like the DCP68, the high end starts rolling off around 7 MHz. Asia Map - Asia continent is not only the largest but also the most populous and diverse continent in the world, covering about 30% of Earth's total land area. Added the amplifier and the first shield. Googling "2N5109 amplifier" produces an abundance of ideas, including one from SV1AFN, "A General Purpose 2N5109 Amplifier, Use it as a receive pre-amp,. Bob, DU7ET planning to be active again as VQ9ET from Diego Garcia Island, IOTA AF-006, Chagos Islands. 4)I modeled (using SPICE) the front end FET preamp section of the W1FB preamp and used a 2K ohm load to simulate the input of the MC1350. A MiniCircuits ADE-1 mixer was used as RX Mixer. Anyway, the one above looks like this when hacked together of old parts:. A simple circuit diagram of the class b amplifier with the using the s is shown below. In addition to the DDS there is a 2N5109 amplifier used to lift the DDS output up to the level required by the TR-7. one of them uses it to control electrical appliances. RF Power Bipolar Transistors Depending on Frequency and Power Output, I like 2N3866, 2N4427, even the very old 2N3375 and 2N3632 types or their soviet equivalents. 75 also 2N244 xref to NTE293 AF Amp or driver squarish old transistor case NPN Si qty 5 in bin BLK1 2N244. They are joied together using 1" long pieces of 2 1/2" PVC pipe (not shown). And it comes with lots of documentation , including PCB layout. Beverage Antenna Pre-Amplifier (2N5109) Beverage Antennas Switch VHF DK7ZB antenna 4 x 4 elements for 144 MHz Low noise pre-amplifier for 144 MHz 14 element Yagi DL6WU for 2m band The rope antenna for 144 MHz Do you know what your antenna sees? Panoramic view from the top of the mast. Circuit consists of a low-noise dual-gate MESFET RF amplifier, mixer, tunable local osc. 50 / Piece. As built, I measured about +13 dB gain and it drew 118 mA @ 14. any spice models for 1S5 or other battery. So far, the DXE pre-amplifier has the closest match to 50-ohms over the range of 300kHz to 30 MHz. Gain is up to 18dB and there is also build in variable ATT. Description: This is a down converter that converts wide band TV signals in the 420 to 440Mhz (70-cm amateur TV) to a 61. 1 Piece (Min. Zisk je do 18dBA a je možné. Transistor, NPN, Silicon, High-Frequency, Amplifier Type 2N5109 Quality Levels JAN, JANTX, JANTXV, JANS, JANHC, JANKC. The most important part of this design in my opinion is the transformer and working state of the transistor 2N5109. Notes The circuit uses two 2N3819 FET's in cascode configuration. Gain is up to 18 dB and there is also build in variable ATT. Class B and C RF Amplifier Operating Characteristic Curves Online www. The PN2222A preamps are running about 5 to 10 dB less on the OIP2 IMD, but not much difference on the OIP3 IMD, however, there is little difference on gain (3dB frequency span). 5-5 W and RX preamplifier. If you've been using transistors like the 2N3866, 2N5109, or stud mounted devices, read on. In addition to the DDS there is a 2N5109 amplifier used to lift the DDS output up to the level required by the TR-7. MIL-PRF-19500/453 › Transistor, NPN, Silicon, High-Frequency, Amplifier Type 2N5109 Quality Levels JAN, JANTX, JANTXV, JANS, JANHC, JANKC MIL-PRF-19500/453 - REVISION H/AM 1 - CURRENT Show Complete Document History. To bring the level of the VFO to around 5mW, I cascaded two such amplifiers, based on the cheap plastic versions of the 2N2222 BJTs.