Quote:
Originally Posted by Mr.Duncan
I agree, so far R50 and R51 tested fine. But I may replace them just incase.
R50: Measured 232. Spec is 220
R51: Measured 328 Spec is 330
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In my opinion, replacing common resistors that are in spec "just because" is a waste of time if you have operational problems that you need to get fixed, unlike certain capacitors that could be eventual failure points.
Did you know that 10% or 20% carbon composition resistors were often near the plus or minus limit of value because the production line output of a particular value covers the whole range of +/- 20% and then the 5% parts are selected, and then the 10% parts are selected from the remainder, and then the over 20% parts are culled from the final remainder? So old tube-era sets were expected to have resistors that are towards the ends of the spec and still work. The time to replace resistors "just because" is after all the real problems are fixed.