What is the grid current? Maybe a grid-cathode short? Maybe a weak
output relay?
Mike, W1NR
john wrote:
> I've had a recent failure with my Centurion... was operating it about 600
> watts out, when I heard a "TICK" noise (sounded mechanical, not electrical)
> and noted that output power dropped. Plate voltage was still normal, but no
> indicated plate current).
>
> I happened to look into the grill on the top and the PA plates were red.
>
> Turned everything off, then back on a day later, at first all was
> well,
> then the same thing happened again ...amp was normal, then output power
> dropped to exciter levels, and the plates began getting hot as
> before. I've looked beneath the sockets, and nothing seems to have gotten
> too hot here (or anywhere else)
>
> Ideas?
>
> John K5MO
>
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