[Elecraft] KPA1500 no RF passthrough without amp keying

[Michael Walker]

Hey Dave

I had this exact thing happen on the 6300, and what it was was that I had
T'd off the logic on the PTT lead from TX1 to another T/R relay for a
receiving antenna.

I solved the Amp issue by removing the 2nd device, replacing the 6300 with
a Flex 6600 and then using the TX2 ptt line on the 6600 for the receiving
antenna TR relay (ok, I got carried away).  Short story was that the keying
line was not going fully to 0v.

Might you have done something similar?

Mike va3mw



On Fri, Oct 19, 2018 at 8:07 AM David Decoons <rocketnj at gmail.com> wrote:

> I found my KPA1500 does not have RF passthrough in standby unless the
> radio provides amp keying. Is this by design and any way to disable this
> “feature”?
>
> I use a program called DDUtil which limits power out per band to prevent
> accidental overdrive of the amp. When DDUtil is in standby it disables the
> radio’s amp keying line and sets radio to 100 watts automatically.
>
> Thanks
> Dave wo2x
>
>
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