The HiFi chat, build and modification thread!
- Thread starter apache
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Initial measurements on the prototype tone control if anyone's interested. There is a small amount of HF instability (expected with this type of tone control) I can cure that but I don't have any low pF capacitors at home. Will have to grab a few in work tomorrow. Might shift the LF a bit lower, and the HF a bit higher, but will listen first. The HF roll-off is a 'feature' of the crappy soundcard in my measurement PC, and NOT the tone control circuit!
Flat
LF Max
LF Min
HF Max
HF Min
Flat
LF Max
LF Min
HF Max
HF Min
greenstiles
Old School Grand Master
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i wait with baited ears....... 
greenstiles
Old School Grand Master
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would it be easier to make it battery powered ?
More difficult to make it battery powered. This needs split power rails, but fret ye not, I have a fairly radical plan
Brought home some low value caps to nail the HF stability issue so will do that this weekend. Also thinking about using fet input op-amps so I can dump the dc blocking caps (lower input offset voltage traded off against probably unnecessarily low noise)
Watch this space - It's gonna be good!
Brought home some low value caps to nail the HF stability issue so will do that this weekend. Also thinking about using fet input op-amps so I can dump the dc blocking caps (lower input offset voltage traded off against probably unnecessarily low noise)
Watch this space - It's gonna be good!
greenstiles
Old School Grand Master
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I don't understand everything you say......but i'm excited all the same
greenstiles
Old School Grand Master
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here my rotel rcd 855 i think the blue thing out of focus is the clock ??? it says mirophonic all over it....
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