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High Performance Tunable LF-HF Preamp
This is a further progression in the application of the J310 JFET in high performance preamplifiers
post 03 Jun 2026
Preamplifiers Links →
160 Meter preamplifier
KD9SV Products have been helping enthusiasts get the most from their Low Band receiving antenna systems for over 25 years
A 21-30 MHz low noise amplifier
Design of a preamplifier for the "deaf" HF receiver. When you need extra sensitivity for 15, 12 and 10 meter operation - for example for amateur satellites
A High-End UHF Preamp for the VHF/UHF Dongle
I decided to build a smaller preamplifier for UHF 430-440Mhz and to add a sharp filter at its output, most likely an interdigital filter
27-28 MHz Band Antenna Pre-Ampilfier
a simple & effective antenna pre-amp for 10m. Band (28-29.7 MHz). However, this circuit was mainly realised for AO-7 Satellite
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KD9SV Products have been helping enthusiasts get the most from their Low Band receiving antenna systems for over 25 years
Design of a preamplifier for the "deaf" HF receiver. When you need extra sensitivity for 15, 12 and 10 meter operation - for example for amateur satellites
I decided to build a smaller preamplifier for UHF 430-440Mhz and to add a sharp filter at its output, most likely an interdigital filter
a simple & effective antenna pre-amp for 10m. Band (28-29.7 MHz). However, this circuit was mainly realised for AO-7 Satellite
Microsat Ham radio shop for ulari project, aprs, aprs with radio, bluetooth, gps, gsm, ham radio interfaces, weather,accessories, cables to radio
Amateur radio kits by Kanga US
Enigma Component Shop Cable & wire,capacitors, connectors, crystals/oscillators, filters, hardware,kits/modules,test & measurement