HAM RADIO MISC

Listed below are several ham radio projects that I have built. All projects presented have been built, tested, and most are still in use.

This is a 2N5109 broad-band amplifier

An assembly using printed circuit board material to form the circuit and chassis.

A very simple two wire current interface for ICOM remote control via computer

This interface is housed in a DB-25 connector with a metal shell. Point to point wiring on a scrap of printed circuit board is used to build the circuit. The circuit interfaces a current control loop to standard serial interface to a PC on com1 or com2.

Conversion of a DX-35 into a DX-60 clone

A heavily modified (trashed) DX-35 is given a new lease on life by converting it to a DX-60 electrical equivalent.

Heath DX-20 Clone

This is a very nice little MOPA. Copy of the Heath DX-20 design in a much smaller cabinet. Runs an honest 35 watts. Very stable signal up to 20 meters, but a little chirpy above 20 meters.

Z-Match Antenna Tuner

This antenna tuner is built from plans taken from a very old QST article. This is the original Z-Match. It uses an all-band tank design to tune 80 thru 10 meters and provides a ballanced output without need for a balun. This antenna tuner works well, is efficient, and handles power levels up to 500 watts with the components described.