.....would i want to put in series with my LP's neck pickup to start rolling off low just after 100Hz?
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I have to ask why. If it's muddy lower the low side.
https://www.digikey.com/en/resources...gh-pass-filter
1600pf into 1 meg will start at 99hz.
EDIT: don't know why i figured 1meg, so 3200pf into 500k is right as said below.Last edited by mozz; 04-02-2024, 12:11 PM.
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Nope. 3n2 equates to 3200p. 3300p is the closest "standard value". Try 2200p and see how it goes. if it cuts too much lows try the 3300p. If that doesn't cut enough you'll need to combine caps in series or parallel to get a value in between."Take two placebos, works twice as well." Enzo
"Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas
"If you're not interested in opinions and the experience of others, why even start a thread?
You can't just expect consent." Helmholtz
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Originally posted by Chuck H View PostNope. 3n2 equates to 3200p. 3300p is the closest "standard value". Try 2200p and see how it goes. if it cuts too much lows try the 3300p. If that doesn't cut enough you'll need to combine caps in series or parallel to get a value in between.
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Originally posted by daz View Post
Ahh. ok. I have a 2200pf so i'll try it. Seems awfull tho."Take two placebos, works twice as well." Enzo
"Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas
"If you're not interested in opinions and the experience of others, why even start a thread?
You can't just expect consent." Helmholtz
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It's a high pass filter essentially consisting of the series cap and the following AC resistance load.
This load results from paralleling the resistances of Vol. pot, Tone pot and amp input impedance.
For a typical LP this results in about 200k total.
A 6.8nF cap would give a corner frequency of 117Hz.
The load as seen from the cap won't change much (20% max.) with vol. settings - except if 50s wiring is used.- Own Opinions Only -
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Originally posted by Helmholtz View PostIt's a high pass filter essentially consisting of the series cap and the following AC resistance load.
This load results from paralleling the resistances of Vol. pot, Tone pot and amp input impedance.
For a typical LP this results in about 200k total.
A 6.8nF cap would give a corner frequency of 117Hz.
The load as seen from the cap won't change much (20% max.) with vol. settings - except if 50s wiring is used."Take two placebos, works twice as well." Enzo
"Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas
"If you're not interested in opinions and the experience of others, why even start a thread?
You can't just expect consent." Helmholtz
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Ok... In the simulation there's a slope all the way to 950Hz. So the visible "knee" does seem to be as Helmholtz says but is actually down about 4.5dB at 100Hz. For -3dB at 100Hz my simulation shows a 8200p (8.2n) cap would be ideal. At any rate I think a 6.8 should be fine for what daz wants."Take two placebos, works twice as well." Enzo
"Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas
"If you're not interested in opinions and the experience of others, why even start a thread?
You can't just expect consent." Helmholtz
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