[Elecraft] Keiying an external amp with the K2

[Eric Swartz - WA6HHQ, Elecraft]

Hi Fred,

The K2 has this delay function built into its firmware. Look up '8R 
Hold' in the current manual. Once enabled in the menu it will keep 8R 
(and the Keyout line on the KPA100) keyed as long as the keying hang 
time is set for.

73, Eric  WA6HHQ



wayne burdick wrote:
> I have the circuit from the Elecraft web site.  Unfortunately, my SB-220
> won't really do QSK.  Any ideas on how to modify the little perf board
> interface to put some (hopefully adjustable) delay in the release to
> simulate semi-QSK with VOX for the amp?
> 
> 73,
> 
> Fred K6DGW
> Auburn CA CM98lw
> 
> Vic Rosenthal wrote:
>  
> 
>>You shouldn't have any trouble using the keying output of the k2/100, which is
>>based on the 8r line.  There is sufficient lead time to safely key QSK amps (I
>>forget how much, but maybe 15 msec? -- someone who knows, please jump in).  I
>>have used it with homebrew vacuum relay QSK systems as well as an Alpha with PIN
>>diode switching.  You should not need the key-in/out setup.
>
>