[Yaesu] Problem in FT-101E -100v Circuit (Jerry Pittman)

[R_Davis]

You are welcome,

Good luck, and God Bless.
Rick, WD8JJA

----- Original Message -----
From: "Jerry Pittman" <jerryp49 at worldnet.att.net>
To: "R_Davis" <WD8JJA at arrl.net>; <yaesu at contesting.com>
Sent: Sunday, February 15, 2004 6:17 PM
Subject: Re: [Yaesu] Problem in FT-101E -100v Circuit (Jerry Pittman)


> Correction!!!  Sorry Rick,  I spoke to soon.  I pulled the C13 cap from
the
> circuit and found that it had shorted.  You were dead on for the
diagnosis.
> Now to go to the electronics shop tomorrow.
>
> Thanks a Million!!
> 73 Jerry
> WD4OIX
>
> ----- Original Message -----
> From: "Jerry Pittman" <jerryp49 at worldnet.att.net>
> To: "R_Davis" <WD8JJA at arrl.net>; <yaesu at contesting.com>
> Sent: Sunday, February 15, 2004 5:59 PM
> Subject: Re: [Yaesu] Problem in FT-101E -100v Circuit (Jerry Pittman)
>
>
> > 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 at arrl.net>
> > To: <yaesu at 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 at contesting.com>
> > > To: <yaesu at contesting.com>
> > > Sent: Saturday, February 14, 2004 12:00 PM
> > > Subject: Yaesu Digest, Vol 14, Issue 9
> > >
> > >
> > > > Send Yaesu mailing list submissions to
> > > > yaesu at contesting.com
> > > >
> > > > To subscribe or unsubscribe via the World Wide Web, visit
> > > > http://lists.contesting.com/mailman/listinfo/yaesu
> > > > or, via email, send a message with subject or body 'help' to
> > > > yaesu-request at contesting.com
> > > >
> > > > You can reach the person managing the list at
> > > > yaesu-owner at contesting.com
> > > >
> > > > When replying, please edit your Subject line so it is more specific
> > > > than "Re: Contents of Yaesu digest..."
> > > >
> > > >
> > > > Today's Topics:
> > > >
> > > >    1. Problem in FT-101E -100v Circuit (Jerry Pittman)
> > > >
> > > >
> > >
> ----------------------------------------------------------------------
> > > >
> > > > Date: Fri, 13 Feb 2004 12:41:26 -0500
> > > > From: "Jerry Pittman" <jerryp49 at worldnet.att.net>
> > > > To: <yaesu at contesting.com>
> > > > Subject: [Yaesu] Problem in FT-101E -100v Circuit
> > > > Message-ID: <006e01c3f258$9b485ac0$6101a8c0 at JerryPittman>
> > > > Content-Type: text/plain;
> > > > charset="iso-8859-1"
> > > > MIME-Version: 1.0
> > > > Content-Transfer-Encoding: quoted-printable
> > > > Precedence: list
> > > > Reply-To: Jerry Pittman <jerryp49 at 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 at att.net------------------------------
> > > >
> > > > _______________________________________________
> > > > Yaesu mailing list
> > > > Yaesu at contesting.com
> > > > http://lists.contesting.com/mailman/listinfo/yaesu
> > > >
> > > >
> > > > End of Yaesu Digest, Vol 14, Issue 9
> > > > ************************************
> > > >
> > >
> >
>
>