[Elecraft] My KPA-500

[Ted Edwards W3TB]

My trusty KPA-500 has started acting up.
Only 100 watts on 160m and 80m, and it takes more drive on the other bands.
What's the good idea on this?

Yes, the antennas check out fine for 160 and 80.
Good measurement numbers and working fine directly from the K3.

Thanks!

-- 
73 de Ted Edwards, W3TB and GØPWW

and thinking about operating CW:
"Do today what others won't,
so you can do tomorrow what others can't."