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 Post subject: Resistor proprietary color codes (1933 Emerson)
PostPosted: Jan Tue 30, 2018 7:11 pm 
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Looking at a 1933 Emerson 250AW - checking resistors. The color codes seem to make no sense. Has anyone documented what these mean?


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 Post subject: Re: Resistor proprietary color codes (1933 Emerson)
PostPosted: Jan Tue 30, 2018 7:28 pm 
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15k for top one and 250k for the bottom one would "make sense" but without a schematic is only a guess.

I'm sure others more knowledgeable will be able to help you know for sure.

I must admit I've never seen resistors like this before, but could not resist guessing anyway. :D

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 Post subject: Re: Resistor proprietary color codes (1933 Emerson)
PostPosted: Jan Tue 30, 2018 7:43 pm 
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WoodchuckTN wrote:
15k for top one and 250k for the bottom one would "make sense" but without a schematic is only a guess.

I'm sure others more knowledgeable will be able to help you know for sure.

I must admit I've never seen resistors like this before, but could not resist guessing anyway. :D


Ya know - you might be right - one of the colors has an arrow pointing to the left. I was using that as a starting point. Let me re-check these.

Just checked - you must be right. The 3 or 4 that I checked seem to be over 80% off in value. Ugh - I was hoping they were good cause I like the way they look.


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 Post subject: Re: Resistor proprietary color codes (1933 Emerson)
PostPosted: Jan Tue 30, 2018 8:00 pm 
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Those are Micamold brand resistors and are usually bad. Plan on replacing all of them.

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 Post subject: Re: Resistor proprietary color codes (1933 Emerson)
PostPosted: Jan Tue 30, 2018 8:05 pm 
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Ed Engelken wrote:
Those are Micamold brand resistors and are usually bad. Plan on replacing all of them.

Good ol' Micamold :cry:


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 Post subject: Re: Resistor proprietary color codes (1933 Emerson)
PostPosted: Jan Tue 30, 2018 8:08 pm 
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mgrant wrote:
Ed Engelken wrote:
Those are Micamold brand resistors and are usually bad. Plan on replacing all of them.
Good ol' Micamold :cry:

Micamold gets an A for consistency. All* of their parts are bad.

- Leigh

* with the exception of real mica capacitors, which are few and far between.

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 Post subject: Re: Resistor proprietary color codes (1933 Emerson)
PostPosted: Jan Wed 31, 2018 1:39 am 
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Mystery solved - and yet no one commented on the "Victory Beaver" cap in the foreground. Where in the heck did they pull that name out of? :mrgreen:


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 Post subject: Re: Resistor proprietary color codes (1933 Emerson)
PostPosted: Jan Wed 31, 2018 12:17 pm 
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Time for a wild guess, if the capacitor is not original. During the second World War, there was a program to make parts with a limited number of values that could be used to replace virtually all old values. They were called the Victory line. Of course, that does not help make sense of Beaver.


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 Post subject: Re: Resistor proprietary color codes (1933 Emerson)
PostPosted: Jan Wed 31, 2018 3:52 pm 
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tubemaster wrote:
Time for a wild guess, if the capacitor is not original. During the second World War, there was a program to make parts with a limited number of values that could be used to replace virtually all old values. They were called the Victory line. Of course, that does not help make sense of Beaver.

You're right- it's a replacement part. It must have been put in during WW2. They just installed it parallel to the dead one. I've seen Beaver caps before but this is the first Victory Beaver I've seen.


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 Post subject: Re: Resistor proprietary color codes (1933 Emerson)
PostPosted: Feb Thu 01, 2018 11:48 pm 
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I think that the Beaver capacitors were put out by Cornell Dubiler. They also had one called the Blue Beaver.

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 Post subject: Re: Resistor proprietary color codes (1933 Emerson)
PostPosted: Feb Sun 04, 2018 7:09 pm 
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While we are commenting on things, how about just twisting the leads of parts together and soldering them.

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 Post subject: Re: Resistor proprietary color codes (1933 Emerson)
PostPosted: Feb Mon 05, 2018 4:11 am 
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Tom Schulz wrote:
While we are commenting on things, how about just twisting the leads of parts together and soldering them.

Yeah, I noticed that - must have been the new girl on the line. I've ordered all new resistors for this set. Hopefully I can replicate the twist. Probably don't even need to use solder. :roll:


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