OK. Thanks Mike. I couldn't figure why the same specs would have conflicting #'s like that. Wish I could find the original power rating on those resistors. Digi-key & even Vishay-Dale don't list it anymore.
They look like standard 2.5W wirewound resistors.
Why do you 'suspect' the resistors, I would imagine they are VERY, VERY unlikely to be the problem - such resistors are extremely reliable.
Easy to test them, just stick a multimeter on ohms across them and see what they read - although this could vary depending on how they are connected (and it looks like they may be in series/parallel).
Hi Nigel. The circuit board has gotten vary hot there and the resistors have changed color.
All 4 measure 37.3 Ohms. 2 are in series and 2 are parallel.
Thanks Nigel. These might have been old in 1988 and are ancient in 2013, but I find it confusing that the standards didn't support exact identification of power rating. At least it doesn't help me cross-reference.
Simple observation tells you the power rating, they are standard 2.5W resistors - here's a scan of a couple I've just taken out of a drawView attachment 81496
Simple observation tells you the power rating, they are standard 2.5W resistors - here's a scan of a couple I've just taken out of a drawView attachment 81496
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