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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Wed 11, 2019 10:38 pm 
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What is the "det coil"???

HV center tap does not go to chassis....it goes to the field coil.

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"Voltage is fun to watch, but it's the CURRENT that does the work."


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Wed 11, 2019 11:01 pm 
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So HV center tap is pin 5 of speaker plug ? Also on pg 14 of schematic you will see Det coil and Osc coil in one unit under chassis.


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Thu 12, 2019 11:44 am 
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The connection between the HV center-tap and one end of the field coil defines a node. Physically, a node can cover a lot of space, but is everywhere the same electrically. The schematic does not always define all the mechanical details, such as connectors or terminal strips. If pin 5 of the speaker plug connects the 2 points, then it is part of the node.

I don't understand what you are asking about the "Det coil" and the "Osc coil". Is this related to my statement about where the electrolytics connect?

If in doubt, follow the B+ wiring to see everywhere that it goes......when we define where to connect something, we normally give just enough information to avoid ambiguity. I think you will find that my earlier definitions were not ambiguous.

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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Thu 12, 2019 12:34 pm 
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I f you look at page 14 of pacific tv schematic link on pg 1 of this forum you will see red wire from electrolytic can connected to det coil.


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Thu 12, 2019 12:52 pm 
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That is simply the closest physical location.

It is quite common for us to specify connections using the schematic---simply because that is better for showing the functional relationships. We also often suggest a physical location similar to the original. Most of the time, there is no wiring diagram to follow.

Using the schematic helps avoid ambiguity.

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"Voltage is fun to watch, but it's the CURRENT that does the work."


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Fri 13, 2019 12:18 am 
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I will try the electrolytics this weekend. Also i have the problem of one wire disconnected and here are the four connections.
Also inter stage transformer has 5 wires and one not connected and here are the 4 connections
- rf choke
- rf choke
- c 4517
- tone control


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Fri 13, 2019 11:00 am 
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spsquires wrote:
I will try the electrolytics this weekend. Also i have the problem of one wire disconnected and here are the four connections.
Also inter stage transformer has 5 wires and one not connected and here are the 4 connections
- rf choke
- rf choke
- c 4517
- tone control

Look at the schematic. Identify each connection for the transformer based on ALL of the connections---or simply on the name of the node.
Start with the primary: It connects from B+** to the RF choke that goes to the plate of the 2nd detector. There is also a capacitor at the connection to the choke.

Once you find all the connections for the primary, then look at the secondary. Each end goes to the grid of one of the output tubes. The tone control circuit goes between these two points.

Finally, the center-tap of the secondary goes to the junction of the two 100K resistors that are across the field coil. There is also a capacitor at this node. This node is the bias for the output tubes.


**Whenever possible, identify nodes by their function. B+ goes to many places in the circuit, and is one node that you should ALWAYS identify (and label, if necessary)

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"Voltage is fun to watch, but it's the CURRENT that does the work."


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Sun 15, 2019 12:53 pm 
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Got the two electrolytics done with two 10 mfd 450 volts. Now to figure out wire from interstage transformer wire location. Also if you look at first picture I posted on pg 1 there is a wire on bottom right resting on power cord that comes from tuning capacitor not connected. Also did this radio have just volume control or volume and on off in one control?


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Sun 15, 2019 6:13 pm 
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On the photo you posted the volume control has a switch on it (black with 2 wires).

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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 Sun 15, 2019 6:33 pm 
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spsquires wrote:
.......Now to figure out wire from interstage transformer wire location.

i assume you've read the detailed instructions i posted Friday morning.

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"Voltage is fun to watch, but it's the CURRENT that does the work."


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Sun 15, 2019 7:44 pm 
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Yes I did read your post
.


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Sun 15, 2019 10:01 pm 
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I believe I found the wire. Can the wire go from cap .0024 on tone control to pin 3 of tube 7 instead of to pin 3 of tube 7 to cap .0024 on tone control


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Sun 15, 2019 10:05 pm 
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spsquires wrote:
I believe I found the wire. Can the wire go from cap .0024 on tone control to pin 3 of tube 7 instead of to pin 3 of tube 7 to cap .0024 on tone control

What does the schematic say?

edit: the tone control circuit is a cap in series with a variable resistor. Any time you have 2 circuit elements in series, the order does not matter.

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"Voltage is fun to watch, but it's the CURRENT that does the work."


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Sun 15, 2019 10:11 pm 
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The schematic shows it to go to pin 3 first but the wire is not long enough and by the shape and length of wire it is the only possible solution.


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Sun 15, 2019 10:14 pm 
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See my edit to my last post....2 things in series can be in either order

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"Voltage is fun to watch, but it's the CURRENT that does the work."


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Sun 15, 2019 10:19 pm 
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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 .


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Sun 15, 2019 11:37 pm 
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Location: Keystone Heights, FL, USA 32656
Just looking at the pacific tv drawing and your photo, looks like that wire (yellow?) goes to the center terminal on volume control (also yellow?). I may be wrong.

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


Last edited by jrehkopf on Sep Sun 15, 2019 11:48 pm, edited 1 time in total.

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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Sun 15, 2019 11:46 pm 
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So you mean that it connects to center wiper?


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Sun 15, 2019 11:52 pm 
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I don’t know that for sure, just going by the visual appearance. The pacific tv drawing shows yellow coming through a hole, connecting to the volume control, which also connects to the oscillator coil. Does it seem to naturally fit there?

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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 Sun 15, 2019 11:54 pm 
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Yes it does seem like it could fit and what is the purpose of the wire ?


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