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[Amps] SB-220 tuning cap needed

To: <amps@contesting.com>
Subject: [Amps] SB-220 tuning cap needed
From: 2@mail.vcnet.com (Richard)
Date: Tue, 26 Mar 2002 17:09:12 -0800
>Isn't this the way it goes...
>
>Q=CV as in charge q Coulombs
>
>Now for the other Q(uality)
>Loaded tank Q is around 2 to 3
>Unloaded tank Q is around 10
>
>Unplug the antenna, slam the load control
>to minimum C.
>
>Unload that tank at full bore and
>where does all the current go?
>


>I = Q/t
>
>Arc!
>
?  Measured with an o'scope and a HV multiplier probe, in a worst case 
test on a SB-220 using 80m, the potential across The Tune-C was c. 3600 
peak-V -- about 1000V more than normal.  This is within a hundred V of 
the Tune-C breakdown potential.  The bandswitch breaks down at c. 1000v 
higher.  

-  R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, 
www.vcnet.com/measures.  
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