As anyone who's ever [FOOLISHLY -- DON'T TRY THIS AT HOME!] used a pencil
to draw a fiery inch-long arc from the cap of anything bigger than an 813
can attest!
Dick
-----Original Message-----
From: Bill Turner, W7TI [SMTP:wrt@eskimo.com]
Sent: Monday, July 20, 1998 5:17 PM
To: Jon Ogden
Cc: Rich Measures; amps@contesting.com
Subject: Re: [AMPS] Vacuum Cap Rating and Plate Voltage
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.
73, Bill W7TI
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