[WT-support] Crappy SS signals

[Bob Wilson, N6TV]

Sorry guys, this thread was intended for a different reflector, not the
Win-Test reflector.

On Thu, Nov 11, 2010 at 11:10 AM, Bob Wilson, N6TV <n6tv at arrl.net> wrote:

> On Wed, Nov 10, 2010 at 5:30 PM, microHAM America - W4TV <
> microHAM at microham-usa.com> wrote:
>
>> I don't know why you would not take advantage of the K3 PA PTT support.
>
>
> Because I don't believe the MK2R PTT line can handle QSK CW at 40 WPM
> nearly as well as the K3 and the Alpha (or KPA500) alone.  Anything that
> reduces receiver turnaround time, such as a delayed opening of the amplifier
> "KEY" line, hurts QSK performance.
>
> When I first got my MK2R, after moving the jumpers to the SolidState
> position, I tried connecting the MK2R PA PTT line to my Alpha 87A.  As I
> recall, the LPT port CW keying ended up sounding *very* choppy, and there
> was a noticeable over the air "pop" on SSB every time I went from transmit
> to receive.  I went back to a direct connection from the K3 KEY OUT to the
> AMP KEY IN, and everything was perfect.
>
> Conclusion:  no reason whatsoever to use the MK2R's PA PTT line when you
> have a high speed QSK amp and a K3 set for minimum TX DLY.
>
> 73,
> Bob, N6TV
>
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