>
>On Thu, 16 Jul 98 14:35:10 -0500, Jon Ogden <jono@enteract.com> wrote:
><snip>
>>The handbook was correct as everyone told me: With a blocking cap the
>>peak RF voltage is equal to the DC plate voltage. It's without a
>>blocking cap that you get the twice the DC voltage at peak. So I
>>remembered incorrectly!
>_______________________________________________________________
>That figure of equal voltage is correct when the output tank is fully
>loaded. With very light loading and lots of drive, the peak RF
>voltage can be MANY times the DC voltage, and that's when the tuning
>cap will arc.
>
In a worst-case mistune test on an SB-220, the peak V across the tune cap
reportedly measured 3600V The anode supply potential was c. 2800V.
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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