[AMRadio] B&W 5100 ps problem

[Jeffrey J. May]

Mike..K0MAZ is working on my B&W 5100 ..mod xfmr is ok..seems like the 2x2k
resistors each go in series with the regulator tubes..this seems to make all
ok..would really like the factory mod for the mod bias if we can get
it..thanks..Jeff..XV
----- Original Message -----
From: "russ dworakowski" <wb3fau at hotmail.com>
To: <amradio at mailman.qth.net>
Sent: Monday, February 04, 2002 12:52 PM
Subject: Re: [AMRadio] B&W 5100 ps problem


> Mike,  one of the earliest  factory mods to the 5100 was  installing a
pot
> for set up of mod bias. I  do not  have the schematic right now,
> but  I  am thinking  you have a bad  mod  trans.  they do run very hot.
> Good  luck, and I hope I am wrong.  Russ
>
>
> >From: "k0maz" <k0maz at msn.com>
> >Reply-To: amradio at mailman.qth.net
> >To: "Old Tube Radios" <boatanchors at theporch.com>
> >CC: <boatanchors at mailman.qth.net>, <amradio at mailman.qth.net>
> >Subject: [AMRadio] B&W 5100 ps problem
> >Date: Mon, 4 Feb 2002 06:23:18 -0600
> >
> >Greetings All,
> >
> >Working on a 5100 with a ps problem -- it eats OC3's (70 ma. going
through
> >them).
> >The photo and parts list show a 2k/10watt resistor pair (R-62), but
it/they
> >are not on the schematic.  Original problem was no modulator idle current
> >caused by an open R-49 tapped bias resistor (full -105 volts on the
grids).
> >
> >Anybody seem a corrected schematic?
> >
> >Thanks/73,
> >
> >Mike Warren - K0MAZ
> >
> >
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