[Elecraft] Basic Info

[Tommy Alderman]

I suspect my days of QRQ are about over as right now I'm doing pretty good
to copy at just 70 wpm! 

My primary interest is getting 'smooth' full QSK at contesting speeds, i.e.,
26 to 36 wpm. If I can get that, then I'll be happy. I did drop TX DLY from
20 down to 8 and with the K3 barefoot, it sounds pretty darned good. In the
morning I will try this with the Alpha 9500 amp; every time I try it (on
20m), many Eu stations want a 'QSO'. Anyway I am getting close, both at 30
wpm and I just tested with TX DLY set for 8, and at 60 wpm it sounds good.

Tom - W4BQF



-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of W5UXH
Sent: Friday, July 15, 2011 9:44 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Basic Info

Don,

I suspect that Tom wants to run in CW+ (or QRQ) mode, and I believe in this
mode the TX DLY delay parameter must remain at "8" and this effectively
produces a delay from KEY IN to KEY OUT on the order of 4 to 5 msecs.   I
also believe it can not be increased by changing TX DLY?  

My guess is the vacuum relays in the amp might not switch quite this fast.

73,
Chuck, W5UXH



Don Wilhelm-4 wrote:
> 
> Tom,
> 
> I know nothing about that particular amplifier, but I offer a few "in 
> general" facts.
> 
> Pops in the K3 audio while keying an amp could be a sign of "hot 
> switching" in the amplifier.  Try increasing the keying delay in the K3 
> to see if that eliminates it.  If not, check the relay "pull-in time" 
> for the amp (plus any contact bounce time), and if it is not within the 
> K3 Key-to-RF onset time, you will not be able to use QSK with that 
> amplifier unless you can speed up its T/R relay.
> 
> 73,
> Don W3FPR
> 
> 
> 


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