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In Reply to: RE: ... also a reminder bias is set with no signal. It goes up and down once signal applied. (nt) posted by immatthewj on July 28, 2020 at 20:25:26:
ARC was "infamous" for using those resistors as a protection circuit. That's how my old ARC D70 is designed. I've veer had any resisters blow over the years. Though I have had tubes go bad with destroying anything around them. Lucky I guess.
That's interesting about your bias not changing relative to the input signal. So I found an article that says if a certain impedance load is in place, bias will remain as set. Furthermore, if the impedance was too low (bad resistor), red plating can occur. I'm sure there's more to it than than just a resistor regarding the impedance circuit design. Either way, we're learning as we go!
Cheers!
Jonesy
"I know just enough to get into trouble. But not enough to get out of it."
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Follow Ups
- RE: ... also a reminder bias is set with no signal. It goes up and down once signal applied. (nt) - Jonesy 21:27:18 07/28/20 (6)
- RE: ... also a reminder bias is set with no signal. It goes up and down once signal applied. (nt) - immatthewj 12:50:31 07/29/20 (5)
- Economic "in circuit" capacitor meter - Jonesy 14:50:59 07/29/20 (4)
- RE: Economic "in circuit" capacitor meter - immatthewj 14:59:45 07/29/20 (3)
- RE: Economic "in circuit" capacitor meter - Jonesy 15:11:12 07/29/20 (2)
- RE: Economic "in circuit" capacitor meter - immatthewj 15:24:56 07/29/20 (1)
- RE: Economic "in circuit" capacitor meter - immatthewj 16:26:12 08/05/20 (0)