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 Post subject: Cross Reference Manuals For Couplates ?
PostPosted: Jan Mon 29, 2018 4:51 am 
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Joined: Jan Mon 17, 2011 2:10 am
Posts: 103
Location: Revere,Massachusetts U.S.A.
Hi Folks, I know there were many manufacturers for Couplates in the 50&60’s, but does anyone know of any printed material regarding cross reference. Example Erie Corp to Sprague Co.

Thanks Tony


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 Post subject: Re: Cross Reference Manuals For Couplates ?
PostPosted: Jan Mon 29, 2018 1:06 pm 
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Joined: Sep Thu 23, 2010 6:37 am
Posts: 9987
Location: Powell River BC Canada
There were parts lists for standard circuits. There were versions of standard circuits.


The standard circuit was the wiring diagram and pin outs.

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 Post subject: Re: Cross Reference Manuals For Couplates ?
PostPosted: Jan Mon 29, 2018 2:50 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 4226
Location: Charleston, W.Va.
Hi Tony,
I am not personally aware of any cross-reference manuals for one manufacturer against another, although it is possible that they did exist. However, SAMS Photofacts often included cross-references in the parts list for specific radio/TV/audio gear. That is, if the couplate happened to follow one of the so-called standard circuits. Many of these were custom-designed and manufactured for specific sets, so only the OEM part could be used as a direct replacement. When not available, one must make up his own using individual components mounted to a lug strip and/or circuit board.

Here is a good article which addresses this subject. It also contains links to some vintage Centralab publications:
https://thedhtsstore.com/blogs/news/359 ... r-bulplate

EDIT: It should be noted that "couplate" has now become a generic term to describe these, but "back in the day" different manufacturers each had their own name for them, including the following:
Centralab - Couplate
Sprague - Bulplate
Aerovox - PEC (Printed or Packaged Electronic Circuit)

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 Post subject: Re: Cross Reference Manuals For Couplates ?
PostPosted: Jan Mon 29, 2018 3:22 pm 
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Joined: Jan Thu 01, 1970 1:00 am
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Location: 13 Critchley Avenue, PO Box 36, Monteith Ont, P0K 1P0
I'm not close to my books right now, but I do remember seeing descriptions and schematics for various couplates in the wholesaler catalogues that I collected. These would date to the fifties and sixties. These won't be original manufacturer documents, but they should be accurate.

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 Post subject: Re: Cross Reference Manuals For Couplates ?
PostPosted: Jan Tue 30, 2018 3:54 am 
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Joined: Jan Mon 17, 2011 2:10 am
Posts: 103
Location: Revere,Massachusetts U.S.A.
Thank You to Postin & everyone!
For time and information regarding these parts. I watched on UTube that they were also called “Networks” .
I’m sure if one had to replaced it would be easier to just install separate caps & resistors. Would be nice to go original but .....


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 Post subject: Re: Cross Reference Manuals For Couplates ?
PostPosted: Jan Tue 30, 2018 4:13 am 
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Location: SoCal, 91387
transoceanic 8523 wrote:
Thank You to Postin & everyone!
For time and information regarding these parts. I watched on UTube that they were also called “Networks” .
I’m sure if one had to replaced it would be easier to just install separate caps & resistors. Would be nice to go original but .....

Replacing with discrete components is really the only way to effect a repair at this point in time. Ain't no parts jobbers like in the old days. I've had to do this with two different portable tube sets. Both times it was simply shunting one open resistor. As long as the print displays the internal cap and resistor values, you are usually good to go.

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 Post subject: Re: Cross Reference Manuals For Couplates ?
PostPosted: Jan Tue 30, 2018 4:18 am 
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Joined: Jan Mon 17, 2011 2:10 am
Posts: 103
Location: Revere,Massachusetts U.S.A.
True no more jobbers or parts houses But.... would be great to run across a box full at a yard sale or flea MKt.
Tony


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 Post subject: Re: Cross Reference Manuals For Couplates ?
PostPosted: Jan Tue 30, 2018 7:12 am 
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Joined: Sep Thu 23, 2010 6:37 am
Posts: 9987
Location: Powell River BC Canada
Just a comment from an era-geezer :shock: , sometimes a dog intermittent got blamed on
a couplate, but turned out to be mica disease in an IF transformer.

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VE7ASO VE7ZSO
Amateur Radio Literacy Club. May we help you read better.
Steve Dow
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 Post subject: Re: Cross Reference Manuals For Couplates ?
PostPosted: Jan Tue 30, 2018 7:22 am 
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Joined: Jan Mon 17, 2011 2:10 am
Posts: 103
Location: Revere,Massachusetts U.S.A.
Outstanding and True !


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 Post subject: Re: Cross Reference Manuals For Couplates ?
PostPosted: Jan Tue 30, 2018 9:44 am 
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Joined: Nov Mon 02, 2009 7:01 am
Posts: 2883
Location: Lincoln City, OR
Greetings to the Forum:

Still looking for an internal schematic for a Sprague M-B372-9. Nine leads. Used in a Waters Compreamp model 359.

Thanks,

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 Post subject: Re: Cross Reference Manuals For Couplates ?
PostPosted: Jan Wed 31, 2018 10:57 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 656
Location: Merrick,NY,USA
FWIW. I've constructed new couplates more than a few times out of desperation to fix a problem I couldn't diagnose. In each and every case, the problem was not the couplate, but rather Silver Mica disease in one or both of the I.F. transformers. In other words, I've never run across a bad one.


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 Post subject: Re: Cross Reference Manuals For Couplates ?
PostPosted: Feb Thu 01, 2018 12:22 am 
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Joined: Jan Mon 17, 2011 2:10 am
Posts: 103
Location: Revere,Massachusetts U.S.A.
I agree ! I’ve never replaced a couplate in 20 yrs of restoration. I never really looked up these Couplates , just find them cool.


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