[Elecraft] Power oscillation problem (KPA500+KAT500)

[Andy Durbin]

I found that the power for onset of oscillation is strongly dependent on frequency:


7.01 C0,L0, SIDE T - max no osc 108 W

7.02 C0, L710, SIDE T - max no osc 118 W

7.03 C0, L710, SIDE T - max no osc 129 W

7.10 C0, L710, SIDE T - max no osc  222 W

7.20 C47, L820, SIDE T - max no osc unknown not present at 400 W.

7.299 C323, L870, SIDE T  - max no osc unknown not present at 400 W.


KAT500 tuning solution is not thought to be significant but was included in my test notes.


This is looking more like an RFI problem to me.


73,

Andy, k3wyc