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Old 18th March 2014, 05:11 AM   #1
eimis is offline eimis  Australia
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Unhappy Mistakenly ordered a 100k pot for O2 amp.

Hello,
I mistakenly ordered a 100k step pot for my DIY O2. I've been using a wiper 10k pot in it, but experienced some balance problems.

How bad is it to use a 100k pot in it? What problems would this cause? Thanks.
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Old 20th March 2014, 11:01 AM   #2
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Volume control won't be quite so log beyond the 12 o'clock position or so. Maximum noise level increases by a few dB. Probably somewhat higher distortion.

If you had balance problems with the pot, you probably either had a cheapie pot, got unlucky with the particular sample (RK09s may apparently vary a bit) or had too much voltage gain. If your sources are relatively loud (like CD player level), even the usual medium-sensitivity hi-fi cans tend to be quite happy at 0 dB gain, so a 1/2.5x gain config may be all you ever need.
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