[Elecraft] KPA1500 not amplifying

[n7wy at rocketmail.com]

I used my K3S driving my KPA1500 on Saturday during Makrothen and state QSO parties with no issues.  I have the integration cable and RG-8X for the RF path.


Sunday AM with the K3S set to 22 W, the KPA1500 was outputting 22 W more or less, not the 750 W I expected and got the day before.

With the K3S set to 11.5 W, the KPA1500 produced about 400 W out.

With the K3S set at 100 W, and the KPA1500 in STBY, the KPA1500 power meter read 100 W more or less.


Later in the day the situation self-healed, but the healing did not last.


Trouble shooting ideas ?  The recent KPA1500 manual troubleshooting section suggests the obvious stuff which is irrelevant.


N7WY - Bob R