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 Post subject: Resistor type dating question
PostPosted: Jun Thu 10, 2021 8:44 pm 
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Joined: Aug Mon 09, 2010 2:57 am
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Location: York PA.
There's a current thread in the TV restoration section of ARF:

viewtopic.php?f=3&t=397889

I've never restored a TV (although two are sitting in my attic..... someday....) but doing a quick search on the TV model in that thread dates the indicated circuit board to be late 50s or early 60s.

There are numerous carbon composition resistors on the board, as well as what looks to be a single metal oxide resistor and a single carbon film resistor. Are those originals or the result of later repairs? I didn't realize anything other than carbon composition resistors were used for TVs (and radios) of that era.

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 Post subject: Re: Resistor type dating question
PostPosted: Jun Fri 11, 2021 12:28 pm 
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Joined: Nov Wed 30, 2016 7:35 pm
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Location: Sunbury, Ohio 43074
As per the last post in that thread :
Quote:
Some form of metal oxide or metal film resistors were available in that era, and show up as power resistors in color TV sets. That said, the 2 resistors in your picture are definitely modern.

The ones shown in that photo are not originals. There's no telling when they were put on the board, but they are current vintage types.

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