- 137 kHz antenna preamplifier
- A simple 137 kHz antenna preamplifier to make your FT-817 (and others) useable on 2200m band.
[ Hits: 970 | Votes: 3 | Rating: 6.67 ]
- 144 MHz Antenna Pre-Ampilfier
- Electronic circuit and components layout fot this VHF Preamp
[ Hits: 3126 | Votes: 5 | Rating: 6.4 ]
- 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.
[ Hits: 17391 | Votes: 27 | Rating: 6 ]
- 144Mhz preamplifier
- A preamplifier project based on Rainer DJ9BV project, in french
[ Hits: 3248 | Votes: 2 | Rating: 7.5 ]
- 2 Meter GaAs FET Preamp
- KD9JQ 2 meter GaAsFET preamplifier by KD9JQ
[ Hits: 5424 | Votes: 4 | Rating: 5.75 ]
- 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: 3886 | Votes: 6 | Rating: 4.67 ]
- 432MHz Low Noise Preamp
- An easy to build with a cheap HEMT FET Transistor Low noise preamplifier with FHX35LG based on JH0WJF design
[ Hits: 561 | Votes: 1 | Rating: 10 ]
- 435 plus 1296MHz ATF54143 Pre-amplifier
- The prototype for this amplifier was originally designed for 70cm and was used on the 2004 3B9C Dx-pedition to Rodriguez Island for satellite and EME. It had a noise figure of 0.49dB with an associated gain of 20dB.
[ Hits: 81 | Votes: 0 | Rating: 0 ]
- 6m Preamp
- A dead easy 50 mhz preamp by VK3CJS
[ Hits: 5268 | Votes: 1 | Rating: 8 ]
- Amateur Radio - Microphone Preamp
- Low signal, noise-high AC gain preamplifier
[ Hits: 898 | Votes: 0 | Rating: 0 ]
- 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: 2657 | Votes: 2 | Rating: 4.5 ]
- Antenna pre-amplifier for 10 m
- A simple & effective antenna pre-amp for 10m. Band (28-29.7 MHz)
[ Hits: 1642 | Votes: 1 | Rating: 9 ]
- Attenuators and Preamps
- How to get the most from attenuators and preamps
[ Hits: 2073 | Votes: 3 | Rating: 3 ]
- Audio Preamp
- Easy circuit that provide good gain to weak audio signals
[ Hits: 3648 | Votes: 2 | Rating: 3.5 ]
- Designing Op Amp Audio PreAmplifiers
- Design guidelines for Op Amp audio preamplifier circuits by Mike Martell N1HFX
[ Hits: 1562 | Votes: 4 | Rating: 3.25 ]
- DL5DBM`s 2 meter Antenna preamp
- Homebrew with CF300 DGMF with about .24 dBD gain
[ Hits: 3103 | Votes: 5 | Rating: 7.6 ]
- GaAs FER Pre Amp Cookbook
- There are many designs for building preamps each with their own advantages and disvantages. In this PDF Article author reviews several different types.
[ Hits: 455 | Votes: 0 | Rating: 0 ]
- General purpose RF Wideband PreAmp
- General purpose RF Wideband PreAmp based on BSX-20 transistor with a frequency range 14-550 MHz
[ Hits: 2304 | Votes: 2 | Rating: 5.5 ]
- Improving Receiver Noise on 50 MHz
- Tests on a preamplifier for 50 MHz installed right at the feedpoint of the antenna.
[ Hits: 864 | Votes: 0 | Rating: 0 ]
- LF/MF Preamplifier
- A universal LF/MF preamplifier by Lyle Koehler, K0LR
[ Hits: 1945 | Votes: 2 | Rating: 4.5 ]
- Low Power LF Amplifier
- ON6MU Low Power amplifier
[ Hits: 771 | Votes: 0 | Rating: 0 ]
- Mic Pre Ampllifier
- A microphone preamplifier schematic for hand-helds by ON6MU
[ Hits: 1549 | Votes: 2 | Rating: 4 ]
- Mic Preamplifier
- Mic Preamp, schematic by Anthony Gargasz, KB8WOW
[ Hits: 484 | Votes: 0 | Rating: 0 ]
- 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: 3124 | Votes: 1 | Rating: 10 ]
- PHEMT (GaAs FET) Preamplifiers
- Angle Linear has been producing GaAs FET preamplifiers since 1980
[ Hits: 2116 | Votes: 3 | Rating: 8 ]
- Radio Preamplifier for 2 mtr reciever
- 20db gain 144 Mhz preamplifier by Harry Popov LZ1BB
[ Hits: 1891 | Votes: 0 | Rating: 0 ]
- Simple Cheap MMIC Preamps
- Who needs a GaAsFET? Tuning, constructions and Packaging by Paul Wade
[ Hits: 498 | Votes: 0 | Rating: 0 ]
- The 50MHz Assistant
- Preamp & Power Amp By Alkberto, I0XGR
[ Hits: 2401 | Votes: 1 | Rating: 10 ]
- Transistor Audio Preamplifier Circuits
- Design Guidelines for Bipolar Transistor Audio Preamplifier Circuits By Mike Martell N1HFX
[ Hits: 1717 | Votes: 3 | Rating: 4.33 ]
- Tri-Mode Buffer Amplifier Box
- The TMB-1 is an RF amplifier unit / receiving accessory that can be used with a low-impedance broadband loop, a high-impedance terminated loop (such as a Pennant, Flag, or Kaz Delta), and whip (telescoping rod) antennas.
[ Hits: 860 | Votes: 1 | Rating: 1 ]
- 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: 7958 | Votes: 3 | Rating: 6.33 ]
- U310 FET preamplifier
- Extremely reliable FET preamplifier can handle several watts directly into either the input or the output without failure
[ Hits: 951 | Votes: 2 | Rating: 9 ]
- UHF Low Noise Antenna pre-amp
- Low Noise Antenna pre-amp for SAT, EME & DX-ing
[ Hits: 2222 | Votes: 2 | Rating: 2 ]
- VHF UHF preamp
- ON6MU project for a vhf uhf preamplifier
[ Hits: 13696 | Votes: 20 | Rating: 3.7 ]
- W7IUV HF Preamplifier
- Schematic and pictures of a W7IUV preamplifier
[ Hits: 2792 | Votes: 2 | Rating: 1 ]
- W7IUV Low Band Preamp
- Pre amplifier using a 2N5109 for the 160 meters band
[ Hits: 2115 | Votes: 4 | Rating: 5 ]
- Wideband PreAmp's for HF/VHF/UHF
- Wideband VHF/UHF/SHF monolithic PreAmp based on MARx-series by ON6MU
[ Hits: 3067 | Votes: 4 | Rating: 8.75 ]
