Topband: T - vertical improvement

[K4SAV]

WX5G wrote: At 1.5 kW the 370 pF cap will see 10 kV RMS. You are looking 
at a vacuum variable capacitor.

Mike wrote: Great discussion, is there a good source of vacuum variables 
(at reasonable prices)
for this application.  Everything I've found has been in the $300+ 
dollar range?
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The 10KV number is in error.  It's actually closer to 1570 VRMS at 6.7 
amps for 1500 watts input.  I sent WX7G a note so that he could fix the 
error, but he didn't respond.  An air variable will do for this, 
provided you keep it dry.

Jerry, K4SAV
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