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Home : Technical Reference : Preamplifiers

• 4m Preamplifier  ^new - Here is a simple but good performance 4m pre amp. The device used is a BF994S low noise dual gate mosfet
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Home : Technical Reference : Raspberry Pi

• RMS Gate on a Raspberry Pi  ^new - notes and details specific to the Ax25 service and the Linux RMS Gate software by Charles S. Schuman, K4GBB
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• WSPR transmitter using a Raspberry Pi  ^new - Makes a very simple WSPR beacon from your RasberryPi by connecting GPIO port to Antanna (and LPF), operates on LF, MF, HF and VHF bands from 0 to 250 MHz.
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