Thats what I figured Don as there is a lot of range in that tuning. Henry
did the same with their 8874 paging amps and was not known to reinvent
things if not required.
Tweak that input cap and then bring up the drive to no more than 75W while
watching grid current. A good tube will reach full output well below the
spec sheet while a well used one needs more drive and current.
Carl
KM1H
----- Original Message -----
From: "Donald Fox" <taurusshoguy@yahoo.com>
To: <amps@contesting.com>
Sent: Thursday, January 31, 2013 1:39 PM
Subject: [Amps] Henry 3002 help
Carl and Colin:
I have done some checking by comparing the measurements of the two output
plate lines against measurements from a fellow 3002 owner. The result was
that they appear to be identical.
As you might imagine, the output plate line is all silver plated and very
"elegant" looking as the Henry advertisement used to say.
The output tune/load caps are plates with teflon sandwiched between them
and the tube plate assembly.
I viewing the input circuit, it consists of two small coils of varnished
wire and a small bread slicer cap.
If you guys saw this thing, I think you would agree that it was extremely
well cared for considering the use was commercial and not Amateur.
If you recall, the blower was one item that needed attention when I got it
so the motor has been replaced. I did post my parts/info on that here so
others with Henry consoles might make future use of it.
I will do some further testing and report back with my collected data.
Thanks to the collective wisdom here for any and all future help.
Don N8ECH
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