Thanks for the tip Rick. I checked that cap and it appears okay, so the
search goes on.
Jerry
----- Original Message -----
From: "R_Davis" <WD8JJA@arrl.net>
To: <yaesu@contesting.com>
Sent: Saturday, February 14, 2004 12:41 PM
Subject: [Yaesu] Problem in FT-101E -100v Circuit (Jerry Pittman)
> Check the coupling capacitor, C13, between the 12BY7A and the finals.
> Rick, WD8JJA.
>
> ----- Original Message -----
> From: <yaesu-request@contesting.com>
> To: <yaesu@contesting.com>
> Sent: Saturday, February 14, 2004 12:00 PM
> Subject: Yaesu Digest, Vol 14, Issue 9
>
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> > 1. Problem in FT-101E -100v Circuit (Jerry Pittman)
> >
> >
> > ----------------------------------------------------------------------
> >
> > Date: Fri, 13 Feb 2004 12:41:26 -0500
> > From: "Jerry Pittman" <jerryp49@worldnet.att.net>
> > To: <yaesu@contesting.com>
> > Subject: [Yaesu] Problem in FT-101E -100v Circuit
> > Message-ID: <006e01c3f258$9b485ac0$6101a8c0@JerryPittman>
> > Content-Type: text/plain;
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> > Precedence: list
> > Reply-To: Jerry Pittman <jerryp49@worldnet.att.net>
> > Message: 1
> >
> > Hello to all,
> > HELP! I wonder if anyone has run into this problem:
> >
> > My 101E was just idling along while I was working on the computer the =
> > other evening, when I started smelling something hot. I shot the rig =
> > off immediately and found that the bias control (VR1) on the voltage =
> > control board (PB1547B) had over heated, as well as the (2) 10K =
> > resistors on either side of the control.
> >
> > When I check the voltage at pin 5 of the 1547 board, I found that it was
=
> > getting -160v instead of -100v. I went to the Rectifier board (PB1076B)
=
> > and made tests there. When I disconnected the lead from the -100v =
> > terminal, the voltage shows -60v but with it is connected it shows =
> > -160v. With the lead disconnected I also tested it for AC voltage and =
> > it shows 125vac as well as -60vdc.
> >
> > I checked all the components on the 1076B board and found all okay, but
=
> > just to be sure I hadn't missed something, I put in a used PB1076B board
=
> > and found all of the same readings. I had already checked all of the =
> > other voltages coming and going from the 1076B and all are correct =
> > except the -100v. The voltages from all of the transformer taps appear
=
> > to be within range as well.
> >
> > Does anyone have an Idea or run into this before?
> >
> > Thanks in advance for any responses.
> > Jerry
> > WD4OIX
> > jerryp49@att.net------------------------------
> >
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> > End of Yaesu Digest, Vol 14, Issue 9
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