K3 crazy power output fault

[Martin Sole-3]

My K3F/100 S/N 298 has suffered a power output failure. Switched off
last night everything normal and full power out as has always been the
case. Switched on this morning and essentially nothing. The power meter
flicks up and down like crazy. It's literally all over the shop. ALC
shows a steady 7 bars when keyed, RF power meter on the K3 follows the
LP100A, the odd flicker but essentially nothing. This is CW keyed at
26wpm power meter is LP100A, then dummy load. Identical to last use
yesterday but now its going crazy.\

What' shappened?

Martin, HS0ZED


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