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Want to make small inductor for tone circuit
Want to make small inductor for tone circuit
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Old 5th February 2013, 05:55 AM   #21
gingertube is offline gingertube  Australia
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Join Date: Oct 2004
Location: Adelaide South Oz
Cyclecamper,
The REAL values for your edification

Frequncy Band (centre) is set by the LC resonant frequency which you can calculate from
f = 1/ 2pi (LC)^-2

or 1 over 2 pi root L C (in words.)

OR cheat:
Resonant Frequency Calculator

2300 Hz and 0.047 uF => 101.88mH, call it 0.1 H
1250 Hz and 0.082 uF => 197.7 mH, call it 0.2 H
485 Hz and 0.22 uF => 489.48 mH, call it 0.5 H
235 Hz and 0.47 uF => 975.9 mH, call it 1 H
100 Hz and 1 uF => 2.5 H

You can match those values up with the Fender Part Numbers above.

Next go to Mouser or similar and search for those values. Should be cheaper than a Fender spare part.

Cheers,
Ian
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Old 5th February 2013, 04:36 PM   #22
cyclecamper is offline cyclecamper  United States
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Join Date: May 2010
Location: Chicago IL, Long Beach CA, Vienna VA
Yes, no doubt the calcualated values are better thanthe real original ones. But I might be inclined to make my own before I try to find them, if it ever became necessary again.
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Old 5th February 2013, 07:05 PM   #23
Loudthud is offline Loudthud  United States
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Location: Near Dallas Texas USA
Just out of curiosity, what are the resistances of the inductors? I expect them to be quite high.
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Old 5th February 2013, 07:09 PM   #24
dmills is offline dmills  United Kingdom
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Location: High Wycombe
I think that ^-2 should probably be ^0.5?

73 Dan.
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Old 5th February 2013, 09:53 PM   #25
gingertube is offline gingertube  Australia
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Join Date: Oct 2004
Location: Adelaide South Oz
Dan, Yes, I can never remember the "ALT-number" key sequence for square root sign (if there is one) so end up with a basic mistake like you point out.
Cheers,
Ian
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