[Elecraft] Neat K3 Video!

[Augie Hansen]

Hi Joe,
> ...
> Practically since the introduction of ALC (Collins?) 
> in transmitter systems and external amplifiers, ALC was negative 
> and modern solid state transceivers have maintained compatibility 
> with that "standard" even though it would have been easier if the 
> (external) ALC was positive.
>   

For the record, SGC went the "solid state" way in their amplifier design 
of the SG-500 SmartPowerCube. It uses positive ALC, which is of course 
not usable by most transceivers without translation. So I run mine 
without an ALC connection. The SG-500 protects itself from overdrive by 
attenuating the input if it exceeds 60 watts.

My only problems with the SG-500 are that it doesn't do QSK and its 
keying relay is a bit noisy.

Gus Hansen
KB0YH