[Amps] QST

[Steve Katz]

Bill, in that same article, the bandswitch of the SB-221 (pi net output
section) had a floating rotor connection -- the bandswitch as shown wouldn't
do anything.  I remember spotting that when I glanced at the article and
started chuckling...

WB2WIK/6

-----Original Message-----
From: Bill Fuqua [mailto:wlfuqu00 at uky.edu]
Sent: Monday, December 18, 2006 8:43 AM
To: AMPS
Subject: [Amps] QST



     I am becoming more and more disgusted with the lack of technical 
knowledge QST authors.   A fine example is the article about reviving old 
linear amplifiers in the most recent QST.   There is a schematic and 
description of a half-wave voltage doubler which is claimed to have been 
used on many older amplifiers. But, everyone that I have seen uses 
full-wave voltage doublers. The only half-wave voltage doublers I have seen 
are usually in TV sets and other tube equipment that operated off the power 
line with out a transformer.

73
Bill wa4lav

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