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[Amps] Prepare GU74B

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Subject: [Amps] Prepare GU74B
From: Kees - pa7two <>
Date: Tue, 20 Feb 2007 22:19:48 +0000
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Hi OM Morrie. 
Time for a serious answer:
Connect only the fillament for 6 hours or so and use household blower to cool 
the tube. Check with hot and cold fillaments for shorts.
Then connect the tube into the amplifier, raise the anode voltage by 25% every 
4 hours till maximum. NOTE: gassy tubes will flash over!
After that push the PTT but no RF load for 15 minutes, followed by a 15 minutes 
cool down. Repeat. After that adust the IDLE current. 
Play at half power the first 4 hours. After that try full load.
I hope this helps, 
73, de Kees - pa7two 
In a message dated 2/20/2007 4:22:22 P.M. Eastern Standard Time, writes: Hi All.  What is the best way to prepare a GU74B 
which has not been used forwho  knows how long for use in a amp.Tnx Morrie   
Saute in olive oil and garlic until brown, add salt and pepper to  taste.  
Smoother with onions and serve with a garnish of parsley.   
ENJOY.......Lou<BR><BR><BR>**************************************<BR> Check out 
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