[Amps] Commander-2000 Issues again

[Jos Hermans]

What's in a name "Auto Oscillation" .

From: Robert D. <210525p42015 at denstarfarm.us>
>To: Amps-List <Amps at contesting.com>
>Sent: Tuesday, June 21, 2011 2:31 AM
>Subject: [Amps] Commander-2000 Issues again
>
>Hello. Been using mine for a year. Use it mostly on Meteor and Eme, then
>E-openings.
>
>About a week ago I noticed that I'd go into transmit mode, the Red-Light
>comes on, and power put was as expected .... at first .. then, at random
>intervals, the red-light would come on and instantly go off ... and
>output was only the drive power.
>
>Over the next few days the issue got worse, more often.
>
>SWR is near zero.
>
>What I see today is that, even with the rig turned off, I can rotate
>'Tune' or ;Load' and make the plate current jump up ... and I hear the
>load on the transformer.
>
>I took the top off and inspected ... nothing notable as seen.
>
>Wondering what re the symptoms of one of the two, or both, tubes going
>'South'?
>
>When it works, the output is fine. Just seems that it randomly wants to
>tell itself it can't, or shouldn't, transmit at random times not related
>to how long it's been powered-up. Though, once it happens, it seems i
>have to not use it for several minutes then it 'may' work again.
>
>Today, and for the first time, it also switched the green (warmed up)
>light off each time it shut the red-light off.
>
>Any of this sound familiar?
>
>
>thanks again
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