Well Rob, think about it. Would an HF power transistor, rated at 100 watts
continious carrier, put out a 20 microsecond pulse of 500 watts? You bet
your sweet tutu!! Remember 'duty cycle'?
Tom - W4BQF
----- Original Message -----
From: "Rob Atkinson, K5UJ" <k5uj@hotmail.com>
To: <tentec@contesting.com>
Sent: Wednesday, August 18, 2004 8:28 PM
Subject: TT [TenTec] re Ten Tec amps and ALC
> <<<Tommy,
>
> Is this 500 W spike that "most radios" produce always there? If so, then
> what protects the grids of the tubes in the PA under normal operation?
>
> Or maybe I don't understand exactly which radios have this spike problem.
> Are there modern radios in this category?
>
> Al W6LX>>>
>
> I agree that ALC timing is tricky and can be too slow in some cases,
> resulting in this leading edge spike that has been mentioned, but, three
to
> five hundred watts? Well it would be nice to have exciter PAs beefy
enough
> to produce that, but I sort of doubt it.
>
> Rob/K5UJ
>
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