[AMRadio] B&W 5100 ps problem

[russ dworakowski]

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
>
>
>_______________________________________________
>AMRadio mailing list
>AMRadio at mailman.qth.net
>http://mailman.qth.net/mailman/listinfo/amradio


_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp.