Hi everyone!!
Could someone please tell me what the max. level of DC offset from a source (in my instance a CD player) can be before the DC input cap is really necessary in the Gainclone?
Usign my multi-metre I put one probe inside the phono socket of my cd player, and the other touching the outside of the socket, with the player on, but no CD. measured about 0.54mv on both sockets. Is this acceptable, or should I use the 4.7uF input cap?
Thank you,
- John.
P.S. Nuuk i have read the section on DC offset on your site, but this is with a built Gainclone. I onyl want to build my gainclone once, so need to have the circuit/parts worked out before building. Cheers.
Could someone please tell me what the max. level of DC offset from a source (in my instance a CD player) can be before the DC input cap is really necessary in the Gainclone?
Usign my multi-metre I put one probe inside the phono socket of my cd player, and the other touching the outside of the socket, with the player on, but no CD. measured about 0.54mv on both sockets. Is this acceptable, or should I use the 4.7uF input cap?
Thank you,
- John.
P.S. Nuuk i have read the section on DC offset on your site, but this is with a built Gainclone. I onyl want to build my gainclone once, so need to have the circuit/parts worked out before building. Cheers.
it is possilbe because the player has some DC out...if it's low then u don't need a DC blocking cap in front...however with an amp...the voltage will rise...due to gain and of course the opamp itself itself will have a little Offset...so you have to test for offset at the outputs as well to determine if your amp is working properly...but you wun need the DC blocking capacitor (usually 4.7uF) in front as your CD player seems to have low offset...
Hmmm.... I think I'll go without the input cap then. I'll just make damn sure to test it with an old pair of speakers first 
I doubt - when all's said and done - that there can be a day and night difference between using either the cap, or the input resistor instead. when I've saved up more money I'll build a second one and try it with the input cap and compare the sound. So I gues it comes down to what sounds best - a 220r 2w carbon film resistor, or a 4.7uF Black Gate non-polar cap...
I doubt - when all's said and done - that there can be a day and night difference between using either the cap, or the input resistor instead. when I've saved up more money I'll build a second one and try it with the input cap and compare the sound. So I gues it comes down to what sounds best - a 220r 2w carbon film resistor, or a 4.7uF Black Gate non-polar cap...
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