[ARC5] " ARC-5 " Transmitter Antenna Matching.

[J. Forster]

Mike Hanz wrote:

> Let's be clear on this.  An unun is */not/* required to get a command
> transmitter on the air.  The series cap /*is*/ generally a requirement,
> however - either Marty's receiver variable or the fixed cap that Dave
> suggested.

I agree. The series capacitor IS REQUIRED to resonate the inductor in the set.
This series resonance maximizes the current through the radiation resistance
(i.e.: radiated power)

The only real purpose of adding a transformer would be to raise the resistive
part of the output Z from the 5 to 20 ohm range to roughly 50 ohms to match the
input to a 50 ohm antenna or antenna/tuner combo. There is NO NEED to modify the
Tx.

-John