[Amps] 572B Tech bulletins Corrected URL;Cause

[Pat Barthelow]

Found it:
Svetlana's tech bulletins:

In Google type in:   572B [space space space]+Badger
and you will find:
http://www.svetlana.com/docs/TechBulletins/Techbull-ar.html

Great bunch of references for QRO phyles..

or, specific to the 572B:

http://www.svetlana.com/docs/TechBulletins/appnoteNO.15.html
SPECULATED CAUSE:

The FL 2100 has no grid current meter.  If you tune up a GG amp for absolute 
maximum power ouput, you often have a soaring grid current above spec, 
unless you add the slight bit of extra loading, as recommended.  The extra 
loading drops the output slightly (insignificantly), but usually 
significantly drops grid current.
I bet the 572B failures are due to very high grid currents that are not 
metered, therefore unkown to the operator.

Pat aa6eg at hotmail.com







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