Re: [Drakelist] T4XB No +250V AND blown Filament Fuse

2010-02-12 Thread john 


Paul,

Congrats to you on several accountsfirst for fixing your radio. Second, 
for taking the time to document your struggle and sharing it with us.  It's 
really useful to virtually look over your shoulder during hunts like this. 
We all learn something from it.


Thanks for sharing your journey

John K5MO


At 03:10 PM 2/12/2010, Paul Gerhardt wrote:
OK T4XB is working now.  Finally (with lots of help) and Thanks to the 
group found a shorted Cathode to Filament in V1 which was causing the 
'Tranmit Line' to turn on when it was supposed to be in 
Standby/Rcvr.  Just made a contact with it and got a good report.  Still 
have RF output a bit low but I think will leave it alone this time...


THANKS!!!

Paul K3PG
some rig pix and snow at:

http://pgerhardt.blogspot.com






On Tue, Feb 9, 2010 at 12:00 PM, 
<drakelist-requ...@zerobeat.net> wrote:

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Today's Topics:

  1. Re: Cleaned the TR-4 (Garey Barrell)
  2. Re: Cleaned the TR-4 (Richard Palmer)
  3. Re: T4XB No +250V AND blown Filament Fuse (Paul Gerhardt)
  4. Re: T4XB No +250V AND blown Filament Fuse (Garey Barrell)
  5. ECL counter IC source? (Curt Nixon)
  6. Re: MC10138 ECL counter IC source? (Gary Poland)


--

Message: 1
Date: Mon, 08 Feb 2010 15:56:42 -0500
From: Garey Barrell <k4...@mindspring.com>
Subject: Re: [Drakelist] Cleaned the TR-4
To: drakelist@zerobeat.net
Message-ID: 
<4b707a8a.6080...@mindspring.com>

Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Richard -

The S-Meter is Zero'd with the cleverly disguised ZERO control on the
right side of the chassis.!!  :-)

Disconnect antenna, detune RF TUNE control, and adjust ZERO control for
S1 on the meter.  There is no S0 on Drake meters!

73, Garey - K4OAH
Glen Allen, VA

Drake 2-B, 4-B, C-Line&  TR-4/C Service Supplement CDs
<www.k4oah.com>


Richard Palmer wrote:
>
> There is on thing that is not spelled out. Zeroing the meter. I
> cleaned all the pots and when I went to zero the meter I found nothing
> to help me determine the proper setting. So any help there is
> appreciated.



--

Message: 2
Date: Mon, 08 Feb 2010 18:06:42 -0500
From: Richard Palmer <burnto...@toast.net>
Subject: Re: [Drakelist] Cleaned the TR-4
To: k4...@mindspring.com
Cc: drakelist@zerobeat.net
Message-ID: <4b709902.8000...@toast.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Gary,

Since I cleaned it I knew where it was. I noticed that the zero adjust
affected the meter's reading of the bias also ... so I wanted to get it
set correctly.

Thanks for your help,
Richard Palmer

Garey Barrell wrote:
> Richard -
>
> The S-Meter is Zero'd with the cleverly disguised ZERO control on the
> right side of the chassis.!!  :-)
>
> Disconnect antenna, detune RF TUNE control, and adjust ZERO control
> for S1 on the meter.  There is no S0 on Drake meters!
>
> 73, Garey - K4OAH
> Glen Allen, VA
>
> Drake 2-B, 4-B, C-Line&  TR-4/C Service Supplement CDs
> <www.k4oah.com>
>
>
> Richard Palmer wrote:
>>
>> There is on thing that is not spelled out. Zeroing the meter. I
>> cleaned all the pots and when I went to zero the meter I found
>> nothing to help me determine the proper setting. So any help there is
>> appreciated.
>
> ___
> Drakelist mailing list
> Drakelist@zerobeat.net
> http://mailman.zerobeat.net/mailman/listinfo/drakelist
>
>


--
The law, in its majestic equality, forbids the rich as well as the poor to 
sleep under bridges, to beg in the streets, and to steal bread.   - 
Anatole France





--

Message: 3
Date: Mon, 8 Feb 2010 18:30:25 -0500
From: Paul Gerhardt <phgerha...@gmail.com>
Subject: Re: [Drakelist] T4XB No +250V AND blown Filament Fuse
To: drakelist@zerobeat.net
Message-ID:

<bf7299b

Re: [Drakelist] T4XB No +250V AND blown Filament Fuse

2010-02-12 Thread Paul Gerhardt 
OK T4XB is working now.  Finally (with lots of help) and Thanks to the group
found a shorted Cathode to Filament in V1 which was causing the 'Tranmit
Line' to turn on when it was supposed to be in Standby/Rcvr.  Just made a
contact with it and got a good report.  Still have RF output a bit low but I
think will leave it alone this time...

THANKS!!!

Paul K3PG
some rig pix and snow at:

http://pgerhardt.blogspot.com






On Tue, Feb 9, 2010 at 12:00 PM,  wrote:

> Send Drakelist mailing list submissions to
>drakelist@zerobeat.net
>
> To subscribe or unsubscribe via the World Wide Web, visit
>http://mailman.zerobeat.net/mailman/listinfo/drakelist
> or, via email, send a message with subject or body 'help' to
>drakelist-requ...@zerobeat.net
>
> You can reach the person managing the list at
>drakelist-ow...@zerobeat.net
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Drakelist digest..."
>
>
> Today's Topics:
>
>   1. Re: Cleaned the TR-4 (Garey Barrell)
>   2. Re: Cleaned the TR-4 (Richard Palmer)
>   3. Re: T4XB No +250V AND blown Filament Fuse (Paul Gerhardt)
>   4. Re: T4XB No +250V AND blown Filament Fuse (Garey Barrell)
>   5. ECL counter IC source? (Curt Nixon)
>   6. Re: MC10138 ECL counter IC source? (Gary Poland)
>
>
> --
>
> Message: 1
> Date: Mon, 08 Feb 2010 15:56:42 -0500
> From: Garey Barrell 
> Subject: Re: [Drakelist] Cleaned the TR-4
> To: drakelist@zerobeat.net
> Message-ID: <4b707a8a.6080...@mindspring.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Richard -
>
> The S-Meter is Zero'd with the cleverly disguised ZERO control on the
> right side of the chassis.!!  :-)
>
> Disconnect antenna, detune RF TUNE control, and adjust ZERO control for
> S1 on the meter.  There is no S0 on Drake meters!
>
> 73, Garey - K4OAH
> Glen Allen, VA
>
> Drake 2-B, 4-B, C-Line&  TR-4/C Service Supplement CDs
> 
>
>
> Richard Palmer wrote:
> >
> > There is on thing that is not spelled out. Zeroing the meter. I
> > cleaned all the pots and when I went to zero the meter I found nothing
> > to help me determine the proper setting. So any help there is
> > appreciated.
>
>
>
> --
>
> Message: 2
> Date: Mon, 08 Feb 2010 18:06:42 -0500
> From: Richard Palmer 
> Subject: Re: [Drakelist] Cleaned the TR-4
> To: k4...@mindspring.com
> Cc: drakelist@zerobeat.net
> Message-ID: <4b709902.8000...@toast.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Gary,
>
> Since I cleaned it I knew where it was. I noticed that the zero adjust
> affected the meter's reading of the bias also ... so I wanted to get it
> set correctly.
>
> Thanks for your help,
> Richard Palmer
>
> Garey Barrell wrote:
> > Richard -
> >
> > The S-Meter is Zero'd with the cleverly disguised ZERO control on the
> > right side of the chassis.!!  :-)
> >
> > Disconnect antenna, detune RF TUNE control, and adjust ZERO control
> > for S1 on the meter.  There is no S0 on Drake meters!
> >
> > 73, Garey - K4OAH
> > Glen Allen, VA
> >
> > Drake 2-B, 4-B, C-Line&  TR-4/C Service Supplement CDs
> > 
> >
> >
> > Richard Palmer wrote:
> >>
> >> There is on thing that is not spelled out. Zeroing the meter. I
> >> cleaned all the pots and when I went to zero the meter I found
> >> nothing to help me determine the proper setting. So any help there is
> >> appreciated.
> >
> > ___
> > Drakelist mailing list
> > Drakelist@zerobeat.net
> > http://mailman.zerobeat.net/mailman/listinfo/drakelist
> >
> >
>
>
> --
> The law, in its majestic equality, forbids the rich as well as the poor to
> sleep under bridges, to beg in the streets, and to steal bread.   - Anatole
> France
>
>
>
>
> --
>
> Message: 3
> Date: Mon, 8 Feb 2010 18:30:25 -0500
> From: Paul Gerhardt 
> Subject: Re: [Drakelist] T4XB No +250V AND blown Filament Fuse
> To: drakelist@zerobeat.net
> Message-ID:
>
> Content-Type: text/plain; charset="iso-8859-1"
>
> OK still troubleshooting but found 2 more clues
>
> I pulled all the tubes and the AC4 power resistor R3 in the 250V line is
> now
> cool to touch and V is 260V with NO tubes in.
> When OA2 is in place (only OA2) R3 is too hot to touch and V drops about
> 12V.
>
> 2nd Clue I finally found what smoked in the chassis.  It was hiding under a
> switch shaft in the RF compartment.  The 'smoker' was R30 the 68 ohm 1/2
> watt resistor on V5 (final)
>
> So I think maybe the tube had a grid to fil short and took out both
> circuits.
>
> I am still not getting a spot signal.  R3 is still too hot when OA2 is 'IN'
>
> OA2 is blue not shure otherwise if it is good?  Problem may be on the 150 V
> line as that powers the VFO (I think).
>
> Still have the tubes out.
>
> Paul K3PG in 'snowy' MD
> pix on http://pgerhardt.blogspot.com
>
>
>
>
> On Thu, Feb 4, 2010 at 11:31 AM, Pau