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Preamplifiers
About preamps for ham radio use
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- Low noise preamplifiers
- Lot of projects of preamplifies from HF to VHF and UHF by yu1aw
- 144 MHz preamplifier with BF981
- Design of a preamplifier for 144 MHz with 1 dB NF and 23 dB gain using BF981. This amplifier is using a low cost silicon MOSFET (BF981 from Philips) to give more than 20 dB gain with around 1 dB noise figure on 2 meter.
- VHF UHF preamp
- ON6MU project for a vhf uhf preamplifier
- 2m Band VHF antenna pre-amplifier
- Homebrew pre-amp for 144-146 MHz amateur band and OSCAR Satellites, using BF981
Dual-gate MosFet. Gain ~15 dB, NF=1dB.
- GaAs FET preamps
- Build a good GaAs FET preamp for 2 meters, 222 or 440 Mhz
- MGF1302 GaAsFET
- Published in Radioamater - CQ YU and CQ ZRS magazines, MGF1302 144 MHz and MGF1302 432 MHz
Alphabetical
- 144 MHz preamplifier with BF981
updated
- Design of a preamplifier for 144 MHz with 1 dB NF and 23 dB gain using BF981. This amplifier is using a low cost silicon MOSFET (BF981 from Philips) to give more than 20 dB gain with around 1 dB noise figure on 2 meter.
[Hits: 8579 | Votes: 15 | Rating: 4.00] - 144Mhz preamplifier
- A preamplifier project based on Rainer DJ9BV project, in french
[Hits: 687 | Votes: 0 | Rating: 0.00] - 2 Meter GaAs FET Preamp
- KD9JQ 2 meter GaAsFET preamplifier by KD9JQ
[Hits: 1786 | Votes: 1 | Rating: 1.00] - 23 cm GaAs FET preamplifier
- On 23cm the best way to obtain a good RX-sensitivity is to use a GaAs-FET in the front-end, since these devices show very low noise figures.
[Hits: 2169 | Votes: 5 | Rating: 5.20] - 23cm dual stage preamp
- A modification / combination of the DJ9 BV & I5TDJ
144 MHz preamp designs
[Hits: 1432 | Votes: 1 | Rating: 10.00] - 2m Band VHF antenna pre-amplifier
- Homebrew pre-amp for 144-146 MHz amateur band and OSCAR Satellites, using BF981
Dual-gate MosFet. Gain ~15 dB, NF=1dB.
[Hits: 5518 | Votes: 50 | Rating: 9.10] - 6m Preamp
- A dead easy 50 mhz preamp by VK3CJS
[Hits: 2386 | Votes: 0 | Rating: 0.00] - Amplifiers and Vacuum Tubes Tuning Loading and Arcing
- Page on amplification topics. From vacuum tubes to various components, discussion on stability and arcin causes.
[Hits: 1651 | Votes: 2 | Rating: 4.50] - Attenuators and Preamps
- How to get the most from attenuators and preamps
[Hits: 439 | Votes: 1 | Rating: 2.00] - Audio Preamp
- Easy circuit that provide good gain to weak audio signals
[Hits: 1731 | Votes: 1 | Rating: 1.00] - BFP196P BJT
- BFP196P BJT by Infineon vs BFG540X BJT by Philips
[Hits: 1102 | Votes: 0 | Rating: 0.00] - Designing Op Amp Audio PreAmplifiers
- Design guidelines for Op Amp audio preamplifier circuits by Mike Martell N1HFX
[Hits: 367 | Votes: 1 | Rating: 1.00] - DL5DBM`s 2 meter Antenna preamp
- Homebrew with CF300 DGMF with about .24 dBD gain
[Hits: 1507 | Votes: 3 | Rating: 9.00] - GaAs FET preamps
- Build a good GaAs FET preamp for 2 meters, 222 or 440 Mhz
[Hits: 3932 | Votes: 0 | Rating: 0.00] - Garex VHF preamp
- It is available for spot frequencies in the range 40 - 250MHz, where a typical gain of 26dB can be achieved
[Hits: 1709 | Votes: 2 | Rating: 6.00] - LF/MF Preamplifier
- A universal LF/MF preamplifier by Lyle Koehler, K0LR
[Hits: 141 | Votes: 1 | Rating: 1.00] - LNK Receiver Preamp
- It is tempting to hope that a preamp can make any receiver more sensitive, in any situation. But, it is important to understand what happens when you add a preamp before a receiver.
[Hits: 1747 | Votes: 1 | Rating: 10.00] - Low noise preamplifiers
- Lot of projects of preamplifies from HF to VHF and UHF by yu1aw
[Hits: 10025 | Votes: 9 | Rating: 4.00] - MGF1302 GaAsFET
- Published in Radioamater - CQ YU and CQ ZRS magazines, MGF1302 144 MHz and MGF1302 432 MHz
[Hits: 3438 | Votes: 3 | Rating: 5.67] - Mizuho products
- Mizuho Tsushin Co. was a small Japanese manufacturer of QRP radios and kits, shortwave receiver accessories, and AM broadcast band receiver kits and antennas
[Hits: 1857 | Votes: 1 | Rating: 10.00] - Motorola Micor Highband Preamp
- Make 150.8 - 174 Mcs. RF Preamp properly tune the Two Meter ham band.
[Hits: 1183 | Votes: 1 | Rating: 10.00] - PHEMT (GaAs FET) Preamplifiers
- Angle Linear has been producing GaAs FET preamplifiers since 1980
[Hits: 1041 | Votes: 0 | Rating: 0.00] - Preamplifier for 144 mhz
- CX2UA 144 mhz preamplifier homemade project in spanish
[Hits: 388 | Votes: 18 | Rating: 9.01] - Radio Preamplifier for 2 mtr reciever
- 20db gain 144 Mhz preamplifier by Harry Popov LZ1BB
[Hits: 302 | Votes: 0 | Rating: 0.00] - Receive only processing equipment
- One of our most popular products, receiving preamplifiers are used for achieving top signal band performance in competition operating, low noise longwave reception, repeater applications into the UHF region, or lab use
[Hits: 1115 | Votes: 0 | Rating: 0.00] - Small Signal RF Amplifier
- A bipolar small signal RF amplifier
[Hits: 114 | Votes: 0 | Rating: 0.00] - The 50MHz Assistant
- Preamp & Power Amp By Alkberto, I0XGR
[Hits: 1143 | Votes: 0 | Rating: 0.00] - Transistor Audio Preamplifier Circuits
- Design Guidelines for Bipolar Transistor Audio Preamplifier Circuits By Mike Martell N1HFX
[Hits: 161 | Votes: 0 | Rating: 0.00] - U301 FET preamplifier
- This FET preamplifier has been around for almost 25 years. It is extremely reliable and can handle several watts directly into either the input or the output without failure.
[Hits: 3293 | Votes: 3 | Rating: 6.33] - VHF UHF preamp
- ON6MU project for a vhf uhf preamplifier
[Hits: 7428 | Votes: 17 | Rating: 3.06] - W7IUV HF Preamplifier
- Schematic and pictures of a W7IUV preamplifier
[Hits: 78 | Votes: 0 | Rating: 0.00] - W7IUV Low Band Preamp
- Pre amplifier using a 2N5109 for the 160 meters band
[Hits: 306 | Votes: 1 | Rating: 10.00]
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