[Elecraft] Sequencing a chain of equipment with a K2 at the head.

[Vic Rosenthal]

Guy Olinger, K2AV wrote:

> Dot paddle low *OR* dash paddle low *OR* 8R low gives pass-long low.
> The OR function can be done with diodes, but it would need to be
> buffered because nearly all of the downstream devices require you to
> GROUND *their* voltage.
> 
> And this will only work with devices capable of "QSK" state switching
> speeds.
> 
> If you add a variable VOX delay style "hang", more devices can be
> switched, but hardly all.

I don't recall how long the delay from the assertion of 8r to the 
appearance of RF is, but it was long enough for the vacuum-relay 
switching my homebrew amps as well as the PIN diode switching in my 
commercial model.  The question is, should the exciter have to worry 
about slow el-cheapo changeover relays, or should the amplifier be 
designed (or modified) to switch reasonably fast by today's standards?

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