Yes, adding inductance will degrade transient response. As I mentioned in a follow-up post, I thought erroneously that you had been talking about the other resistor -- the one that illuminates the scale factor light, and which therefore is outside of the signal path. For the center post, you would have a bit of a challenge finding a short enough stub that also has sufficient flexibility to tolerate wiggling. I don't recommend my lazybones method for that resistor, although you might be able to get away with some bodge.
As to your later question about materials and noise, carbon comps do exhibit large 1/f noise, but the power spectral density of that excess is a function of dc bias current. There is no dc bias current in that part of the circuit, so the noise of a carbon comp will be pretty much just that of any other resistor; it'll just be plain old thermal noise (below 1nV/root Hz for that 43 ohm resistor).
-- Cheers
Tom
--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070
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On 1/29/2021 08:26, Torch wrote:
Lacking a 43 ohm resistor in my current stash, I soldered two 22 ohm resistors in series temporarily to verify there is no issue with the BNC ground side. That part is OK, no loss of signal when I wiggle the connector, but there is definitely more ringing looking at a fast pulse. I suspect this is due to the additional inductance caused by stringing two resistors together. Would not the additional length of adding a stranded wire cause a similar artifact?
