[Elecraft] Default K3 transmit delay may be too short for slow QRO amplifiers

Wayne Burdick n6kr at elecraft.com
Fri Jun 8 10:33:31 EDT 2018


The delay can be set from 8-20 ms at present. Given the small time offset, this is actually 5-17 ms (approx). Use small values if possible. 

With external keying, you can generally compensate by reducing the device’s weighting. 

Wayne 

----
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> On Jun 8, 2018, at 5:02 AM, "john at kk9a.com" <john at kk9a.com> wrote:
> 
> I agree that 5ms is too fast for many amplifiers. Is computer sent CW also
> spoiled when increasing the delay?  Does it only effect QSK or all
> transmissions?
> 
> John KK9A
> 
> Igor Sokolov ua9cdc wrote:
> 
> Wayne it is a pity that TX delay setting affects CW timing. Changing TX
> delay from default even one or two steps makes CW much worth. Can you
> figure out a way to make CW timing independent from TX delay? With 5 ms
> TX delay working in many contests I already had to change a pair of
> relays in the amplifier. 10-12 ms would be fine for me. 20 ms will
> probably suit the majority of users. But 5 ms is way too fast and
> unfortunately cannot be altered without spoiling CW sending. I know that
> I could build external sequencer but this does not look neat enough
> especially for portable field operation. Every other radio I had allowed
> TX delay adjustment to at least 20 ms.
> 
> 73, Igor UA9CDC
> 
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