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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Mon 16, 2019 12:22 am 
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Looks like it connects the tuning condenser section to the oscillator coil. Again, I am a bit over my head here, not sure.

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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Mon 16, 2019 12:53 am 
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Should there be a voltage on the end of the wire before it is connected?


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Mon 16, 2019 11:49 am 
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Started at cap block number 4517.
- one wire to IF can number 1 .1 mfd
-one wire to tube 227 that is connection point of cap .5 and .1
but not sure on other connections.


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Mon 16, 2019 2:06 pm 
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spsquires wrote:
Thanks so that is the interchange transformer wire. Now the wire from tuning capacitor. The wire in question is the wire that goes to volume control but my problem is my radio has on off and volume all in one so not sure about where wire should go .

There is no functional connection between the tuning capacitor and the volume control. The only thing shared between them is ground.

Start by looking at the schematic and identifying everything that connects to the volume control (just the control--not the switch). For the ground connection---stop as soon as you find it (we don't need to ID everything else connected to ground.
For each of the other two terminals, note on the schematic everywhere it should be connected, and then find those points in the chassis.

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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Mon 16, 2019 3:40 pm 
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What schematic are you using? Could you post a clip of that area on the schematic.


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Mon 16, 2019 4:42 pm 
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Here is a picture and the wire in question has a piece of black heat shrink on it.


Attachments:
DSC00750.JPG
DSC00750.JPG [ 229.54 KiB | Viewed 1041 times ]
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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Mon 16, 2019 7:06 pm 
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It doesn't matter which schematic--they are all essentially the same.

The "volume" control is a variable cathode resistor that is shared between 3 tubes. When the pot is at the lowest resistance setting, the gain (volume) is the highest. In all schematics I've seen the wiper is grounded. In one, one of the end terminals is also grounded. This will not make a huge difference in behavior.

I think you are talking about the brown wire just above the volume control switch. It comes through a small hole in the chassis and has a piece of black sleeving on it.

exactly where does that wire go? If it goes to the tuner, we have to know if it connects to the stator or rotor, and ---if it connects the the stator, which section?

Also, look at the pot and see if one of the terminals is grounded using a strap that fits around the shaft.

My hunch is that your mystery wire is the ground for the tuning cap, and that they found the volume control to be a convenient grounding point.

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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Mon 16, 2019 7:51 pm 
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Yes, I think mechanically, this wire:
Attachment:
Untitled-01.jpg
Untitled-01.jpg [ 180.91 KiB | Viewed 1025 times ]

Electrically, this connection (node?).
Attachment:
Untitled-03.jpg
Untitled-03.jpg [ 213.32 KiB | Viewed 1025 times ]

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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Mon 16, 2019 7:59 pm 
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The yellow wire in first sketch with arrow is the wire in question


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Mon 16, 2019 8:14 pm 
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Here is pic of wire connection to tuning capacitor. It connects to brass plate.


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DSC00752.jpg
DSC00752.jpg [ 169.98 KiB | Viewed 1021 times ]
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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Mon 16, 2019 9:42 pm 
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Also noticed the if coil number 1 has a broker coil that goes to pin 3 speaker plug and heater of tube 3. It is 93.5 ohms so can I use a resistor.


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Mon 16, 2019 11:21 pm 
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spsquires wrote:
The yellow wire in first sketch with arrow is the wire in question

I was showing that the wire in the sketch and the circuit in the schematic are the same circuit.

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“Nothin’s worth nothin ‘till somebody wants it.”—Irv Metter


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Mon 16, 2019 11:23 pm 
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spsquires wrote:
Here is pic of wire connection to tuning capacitor. It connects to brass plate.

I would bend that tab up so it doesn’t touch the chassis.

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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Mon 16, 2019 11:41 pm 
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Why bend it up? Also what about the broken IF coil?


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Tue 17, 2019 12:37 am 
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Forget the IF coil---focus on one thing at a time!!

Is the mystery wire attached to the stator or the rotor?

Definitions:
Stator: does not move, and is insulated from ground.

Rotor: the part that moves. It is connected to ground--usually through several paths

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"Even if you don't understand Ohm's Law, you are still required to obey it."


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Tue 17, 2019 11:09 am 
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The wire is attached to what I believe to be a brass tab that is touching main frame and shaft of rotor goes through it.


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Tue 17, 2019 12:52 pm 
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spsquires wrote:
The wire is attached to what I believe to be a brass tab that is touching main frame and shaft of rotor goes through it.

That is one of the standard methods of grounding the rotor. So....that wire should go to chassis ground. Go back to my comments about how the volume control might have been grounded, and how that could have been used as the ground point for the tuning cap.

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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Tue 17, 2019 1:28 pm 
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Ok so any point on chassis ground will be good. So with that solved can I fix if coil with a resistor?


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Tue 17, 2019 1:36 pm 
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This thread has a good discussion about bypassing a winding on an IF transformer:
viewtopic.php?f=6&t=362832

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"Even if you don't understand Ohm's Law, you are still required to obey it."


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Tue 17, 2019 1:43 pm 
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OK I looked at thread and not sure what size resistor and where to place capacitor.


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