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1.5W VHF Amplifier - This project will explain the basic function of
a class-C transmitter. I will explain how to dimension a transmitter and
the purpose of the different components. I will also explain how you can
build a 1.5W PA transmitter. The project will include PCB,....(schematic
design added 03/08)
40 meter SSB QRP transceiver - In 1987 I built this radio. It has been published in a
national ham radio magazine, and now finally found its way into the web! [Manfred
Mornhinweg]
60 Watt RF Amplifier - Solid state RF power amplifier using IRF840. Simple and easy
to construct. IRF840 can handle a maximum power output of 125 Watts. (added 9/04).
7MHz SSB Transceiver - Circuit diagram and brief description of 7MHz SSB Transceiver
for Hams. The circuit is designed around two numbers of MC1496. It can push around 80
Watts with IRF840 in final. You can down load HTML version or printer friendly word
document. (added 6/06)
807 & 1625 Valves - data on vacuum tubes 807 and 1625 used in ham radio transmitters.
Describes various pin voltages and different operation modes.
90 MHz voltage controlled oscillator for FM Band - Notice the abundance of 2N4401, 1
k resistors and 330 Ohm resistors? That's because I have a lot of each. 2N4401's weren't
intended to be used as varactors, but they work just fine. Don't be afraid to xperiment
with the parts you have on hand. Build this on a ground plane board. Layout is
important..(schematic / circuit added 6/07)
