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In Reply to: RE: Maybe need to clarify posted by Satie on June 25, 2015 at 08:31:00
Thanks: Good answer.
I was thinking just that, at least in part. A speaker with 8 ohms needs (say) 22uf while the listing for Davey's schematic shows NF for a 39k impedance. So, for my 33k, the caps should be a little larger. I'll sit down later and 'do the math'. If I think the answer makes sense, I'll run it by here.
As for a variable resistor? I'm not in love with 'em. They all end up noisy and unless all the way CW or CCW, difficult to repeat settings. I'm inclined to try a 3 or 4 way SWITCH and resistor net, if that's feasible.
Still Noodling.
Too much is never enough
Follow Ups:
You are right and a switched resistor will give a better result, you need at least a 5-6 position switch to give you + / - 3 to 6 db range at good intervals, but you can also get a rotary scale that can allow repeated settings on a pot.
And I can't get it straight?
Use a 'make before break' or 'break before make' switch?
Too much is never enough
If you get a discrete resistor vol control you will have a quiet switch having been chosen for the role. There are decent dact knockoffs on Ebay though I don't remember which vendors are any good, you need to look it up.
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