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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Wed 04, 2019 12:06 pm 
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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Sun 08, 2019 11:08 am 
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Location: A0E 1K0 NL Canada
With the cabinet all done and I guess ok job. I am now looking at electrolytic can that has three wires and one I believe to be ground so is that correct? The other two I assume to be two 8 mfd caps but schematic is still showing a 2 mfd also.


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Sun 08, 2019 4:28 pm 
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Location: A0E 1K0 NL Canada
Right now the radio cap block is has follows.
- brown wire I think cut and not used
-red wire to det coil
-blk wire to ground lug on chassis
-also have a 8 mfd cap with one end on same point on det coil has red wire and other end on pin 5 of speaker plug


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Sun 08, 2019 9:52 pm 
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One thing I do not understand is the exterior 8mfd electrolytic has two wires only that I believe to be attached to two positive points for the two electrolytics det coil and pin 5 of speaker plug


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Mon 09, 2019 12:52 am 
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I now have the chassis put aside for now. Unless someone can shed some light on correct placement of electrolytics.


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Mon 09, 2019 10:09 pm 
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Well i guess i will send the chassis off somewhere to be repaired.


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Tue 10, 2019 8:36 am 
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Guess I should ask one more question should I expect any more help or have I been put on a list for not getting any more help thanks


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Tue 10, 2019 11:23 am 
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spsquires wrote:
I now have the chassis put aside for now. Unless someone can shed some light on correct placement of electrolytics.

Connect the electrolytics in accord with the schematic. Physically, they should be in the same general location as the originals. Remind me which schematic you are using, and I can be more specific.

Quote:
Guess I should ask one more question should I expect any more help or have I been put on a list for not getting any more help
I advise you not to post statements like this. You get pretty consistent help here. Noone here gets paid, and sometimes you just have to wait for answers.
"patience is a virtue"

_________________
-Mark
"Measure voltage, but THINK current." --anon.


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Tue 10, 2019 12:43 pm 
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pixellany wrote:

Quote:
Guess I should ask one more question should I expect any more help or have I been put on a list for not getting any more help
I advise you not to post statements like this. You get pretty consistent help here. Noone here gets paid, and sometimes you just have to wait for answers.
"patience is a virtue"


Everyone here encounters problem projects from time to time that may seem unsolvable. When it happens to me, I stare at the radio and stare at available drawings till the (dim) light bulb (in my head) comes on.

Walking away from the problems from time to time helps the process.

We call this process "Thinking about it" :wink:

Perseverance is another helpful virtue.

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Paul
...... how hard can it be?


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Tue 10, 2019 11:25 pm 
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Location: A0E 1K0 NL Canada
like the pacific tv one has it has 16 pages and very detailed but this is why I am questioning the electrolytics.


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Wed 11, 2019 10:17 am 
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There are 2 electrolytic caps shown on the schematic: 10uF and 8uF. There is a note that the 10uF cap is actually an 8 and 2 in parallel. This is illustrated in the wiring diagram in figure 10. (Note an error in Figure 10---the filter cap assembly is labelled "by pass condenser")

Figure 6 shows the filter assembly near the center of the chassis.

The new electrolytics can be installed under the chassis, or you can restuff the original can--if they will fit. If you put them under the chassis, they should be as close as possible to the original location. The values can be somewhat larger than 10 and 8, but I would not make the first filter larger than 20.

You only need 2 filters---there is no reason to duplicate the use of 8 and 2 in parallel to get the 10 shown on the schematic.

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-Mark
"Measure voltage, but THINK current." --anon.


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Wed 11, 2019 10:30 am 
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Location: A0E 1K0 NL Canada
So you are talking about brown and blue wire in figure 10 page 14


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Wed 11, 2019 10:36 am 
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spsquires wrote:
So you are talking about brown and blue wire in figure 10 page 14

correct

_________________
-Mark
"Measure voltage, but THINK current." --anon.


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Wed 11, 2019 11:08 am 
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So does the one electrolytic connect the positive end to both these points?


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Wed 11, 2019 11:25 am 
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The + end of both caps goes to the cathode of the rectifier (The B+ source)

The negative of the first filter goes to the HV center-tap, and the negative of the second filter goes to the opposite end of the field coil.

Always use this rule:
the most positive point in the DC circuit is the rectifier cathode
the most negative point is the HV center-tap

_________________
-Mark
"Measure voltage, but THINK current." --anon.


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Wed 11, 2019 7:48 pm 
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Location: A0E 1K0 NL Canada
So does it matter if it is pin 1 or pin 4 for positive connection.


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Wed 11, 2019 8:21 pm 
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spsquires wrote:
So does it matter if it is pin 1 or pin 4 for positive connection.

no--the entire filament is the cathode

_________________
-Mark
"Measure voltage, but THINK current." --anon.


Last edited by pixellany on Sep Wed 11, 2019 9:50 pm, edited 1 time in total.

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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Wed 11, 2019 8:29 pm 
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Location: A0E 1K0 NL Canada
Not sure what you mean.


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Wed 11, 2019 9:52 pm 
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The filament is the cathode.**

The DC voltage in a rectifier comes from the cathode.



**More precisely, the tube has a "directly-heated cathode". Not all rectifiers have this.

_________________
-Mark
"Measure voltage, but THINK current." --anon.


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 Post subject: Re: Westinghouse model 801 grandfather clock radio.
PostPosted: Sep Wed 11, 2019 10:22 pm 
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Joined: Mar Fri 07, 2014 10:20 am
Posts: 3452
Location: A0E 1K0 NL Canada
So the connection point on det coil is cathode.
The lug attached to chassis is hv center tap.

The pin 5 of speaker plug is other side of field coil.


Last edited by spsquires on Sep Thu 12, 2019 10:20 am, edited 1 time in total.

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