TopBand: Inverted L

[George Guerin]

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     Mike etc:
     
     It would be good to check the temperature of the 500 pf capacitor 
     after operating for a while.  Some caps, typically ceramic, heat up 
     with RF current.  
     
     I had a series circuit with a vacuum variable and a 330 pfd 15 KV 
     ceramic in parallel to tune out inductive reactance.  The ceramic cap 
     heated up enough to change value.  I ended up using a 250 pfd vacuum 
     as a padder for the vacuum variable, ending the heating problem.
     
     George, K8GG
     
     
______________________________ Reply Separator _________________________________
Subject: TopBand: Inverted L
Author:  "Mike Michon" <michon@eatel.net> at BC_INTERNET 
Date:    10/30/97 11:21 PM
     
     
Many thanks to all the replies about the antenna question.  It was a good 
day.  Got the amplifier running, about 700 watts output.  The antenna was a 
breeze thanks to all the good advice.
     
I fooled around a bit with a broadcast/fm radio variable capacitor and the 
analyzer.  I had a 500 pf 25 kv capacitor left over from the amp.  Put it 
in series, and, like magic the antenna was resonant.
     
Again many thanks for all the help.  Hope to hear you all on the band soon.
     
Mike Michon
AB5XP
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