[Elecraft] K3 firmware upgrade 1.55

[Vic K2VCO]

David Andrews wrote:

> Advice please - the ATU BYPASS feature - is it a real bypass leaving no
> stray capacitance or inductance in the path (unlike the K2)?

The ATU BYPASS in current firmware adjusts the ATU to cancel out the 
stray L/C in the path through the tuner to provide a 50 ohm match.

Early beta firmware simply switched all ATU components to zero. But the 
problem was that then the strays from the traces, relays, etc. caused a 
residual SWR.

What you may be looking for is a pair of coax relays in the K3! This 
does not exist.

-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco