[Elecraft] KAT3 tuning per Antenna

[Vic K2VCO]

Don Wilhelm wrote:

> If one of the outputs is tuned into a 50 ohm resistive load, it is 
> effectively bypassed.  I just don't understand the real need for a 
> bypass and consider it a 'nicety'.  Like if ANT2 has a resonant 
> multiband antenna connected, just tune it once on each band and you are 
> ready to go.
> 
> Perhaps someone can enlighten me about the utility of a true bypass 
> function.

Setting the tuner to a 50 ohm load is a better way of 'bypassing' it 
than removing all the autotuner's capacitors and coils from the circuit 
(which is what 'bypass' does).

Because there is some stray capacity/inductance in the board and 
connections, tuning it into a dummy load cancels this out.

There was a lot of discussion on the beta test reflector about this. 
It's possible that Wayne will either make bypass work per-band, or (as I 
prefer) make it set the tuner (per band) to match a 50 ohm load.

Meanwhile, I just connect my dummy load and tune it (and of course the 
tuner remembers the settings per band) if I want to 'bypass' the tuner 
on a particular band or bands.
-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco