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i have two solid state power amps that have a bipolar electrolytic
capacitor immeadiately following the signal input at the RCA jack.
these caps are 50 mfd and 100 mfd. i assume they are there to stop any DC voltage from the input source. i wish to remove them and replace them with film/foil capacitors. after looking at schematics from other SS amps it appears that film caps of 2.2 to 4.7 mfd would be sufficient and would not alter frequency response. i need confirmation of this from you experts out there.TIA
Follow Ups:
With that we can calculate the filter points with various cap values.Generally, one wants the high-pass filter point to be at least 2 octaves below the lowest frequency one wishes to pass, that generally being 20Hz, and I often recommend going one octave below that.
If the amp will be used for something other than full-range, we can take that into consideration.
I've seen SS circuitry with filter points below 1Hz, which makes no sense to me.
BTW a lower-case 'm' is an abbreviation for 'milli' or thousandth. You're talking about microFarads, millionths of a Farad; the abbreviation for micro is u or µ, the latter made by keying (ALT)0181 (in Windows).
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Tin-eared audiofool and obsessed landscape fotografer.
http://community.webshots.com/user/jeffreybehr
the signal passes thru the electrolytic cap and continues thru a 1k
resistor to the first set of transistors. between the 1k res. and the transistors we have a 330pf cap going to grnd. then a 33k res.in series with a 1k res., the combination going to grnd. between the 33k and 1k, a lead goes to a 22k pot which connects to a 47k res. on each end of the pot.these resistors go to the b+ and b- rails.
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Tin-eared audiofool and obsessed landscape fotografer.
http://community.webshots.com/user/jeffreybehr
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