Try shorting the RCA connector on the amp and see if the TX light comes on.
Load the KPA1500 utility and look at the log file.
Look on the KPA1500 and see what frequency it thinks the amp is on. If it is out of band it will not TX.
That is where I would start. Also check that all cables are seated properly.
Dave wo2x
Sent from my waxed string and tin cans.
> On Oct 28, 2020, at 7:01 AM, Richard Thorne <
[hidden email]> wrote:
>
> Came out to the shack this morning and the KPA-1500 is not going into transmit.
>
> I verified that the PTT cable is shorting when the Flex 6600 goes into transmit.
>
> The amp operates properly otherwise. The ATU works, it shows the power out from the 6600, it just won't go into transmit (no Red TX LED).
>
> I did upgrade to firmware 2.48 yesterday and the amp worked fine. I downgraded to 2.38 this morning, same result, the amp will not go into transmit.
>
> What am I missing early this morning with only a half cup of coffee.
>
> Thanks
>
> Rich - N5ZC
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