RE [R-390] 3tf7 replacement proceedure

[Steve Hobensack]

Norman,
    You could probably leave the the wires the way they are on the 3tf7 tube 
socket and add two jumpers to encompass the filament of the new 12bh7.  That 
way, if you ever come across a 3tf7 at a hamfest/radio fest at a decent 
price, you could just plug it in.
.....Steve...N8YE

Message: 4
Date: Tue, 11 Oct 2005 00:34:44 -0400
From: "Norman J McSweyn" <normn3ykf at stny.rr.com>
Subject: [R-390] 3tf7 replacement proceedure
To: <r-390 at mailman.qth.net>
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Hi all.
I've been doing some reading on the 3tf7 replacment schemes. For the
time
being I think I'll use a 12bh7 in place of the 3tf7.
All I have to do is move the wire on pin two to pin four and the wire on
pin
seven to pin five, right?
de n3ykf