[Elecraft] K3 and sticking amp T/R relay

Scott Manthe scott.manthe at gmail.com
Sun Oct 28 16:21:20 EDT 2012


Config menu item TX DLY, on page 61 of the K3 manual.

73,
Scott, N9AA


On 10/28/12 4:09 PM, Gary Smith wrote:
> My newly acquired 30 year old amp comes with QSK. As there was a
> different relay than came stock I have to assume the circuitry may
> have been altered in the past. I have no way to know this.
>
> After two weeks of normal amp behavior I found the T/R vacuum relay
> had locked in the transmit position. A gentle tap on the NO terminal
> released it and function is back to normal. Mostly normal as I do
> find the ALC idiot light is no longer illuminating and the grid
> metering response appears attenuated but the amplifier puts out full
> power with absolutely no difficulty in that 35W drive gives 1500 out
> to the LP-100A watt meter.
>
> My question for here is; if the amp is not properly sequencing with
> the K3, what setting can I change within the K3 to provide more time
> for the amp's relays to close before the K3 transmits? I remember
> there was a feature to allow ms changes for QSK in the K3. How do I
> find that option? And should I decrease the MS time in the K3 or
> increase it to let the perhaps relay in the amp have time to close
> first to avoid hot switching?
>
> Thanks,
>
> Gary
> KA1J
> ______________________________________________________________
>


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