[Elecraft] K3, TenTec Titan-III and QSK

[Jim Brown]

On 2/12/2012 7:05 AM, Bill Cotter wrote:
> I prefer keying the K3 and letting it control the amp, rather than
> keying the amp and letting the amp key the K3.

I have verified that doing that works FB, even with full QSK, with the 
K3 driving a Titan 425 (original Titan) and Hercules II.  One great 
thing about Ten Tec's amps is that they include circuitry that prevents 
them from going into transmit if the relays are not pulled in (they 
sense the connection), so if the delay in the exciter is not enough, 
they don't transmit. That makes it easy to adjust the delay -- you 
simply start with a short delay and increase it in small steps until it 
works (or start with a longer delay and shorten it in steps until it 
doesn't).  You can't break anything or hot switch because of Ten Tec's 
internal logic. I've not studied their newer amps, but I'll bet they are 
built he same way.  The default delay in the K3 is 8 msec, and was 
chosen because it is enough for most good amps.

73, Jim K9YC