doctorcilantro Posted July 29, 2008 Share Posted July 29, 2008 uF/ MFD nF pF/ MMFD uF/ MFD nF pF/ MMFD 1uF / MFD 1000nF 1000000pF(MMFD) 0.001uF / MFD 1nF 1000pF(MMFD) If someone claims their phono (rca>rca) cable has 1nF of capacitance per meter....isn't this rather high (1000/3 = 333pF/foot)? I know Blue Jeans Cable sells a 30$ interconnect that has 12pF/foot. Am I getting this right? DC Quote Link to comment Share on other sites More sharing options...
Guest " " Posted July 30, 2008 Share Posted July 30, 2008 This is simular to the speaker wire discussions in the sense that many designer speaker wire is designed to change the characteristics of the sound through the manipulation of capacitance, inductance, resistance. In the case of phono lead wire, using cable that has high capacitnce, just saves the trouble off adding capacitors soldered on to the cartrage leads as many cartriges suggest doing. The leads with higher capacitacne are designed that way thru the skin effect created by using insulation types and thichness thicker than usual. So if your performance is too bright, you can add capacitors, or use high capacitance leads. Quote Link to comment Share on other sites More sharing options...
doctorcilantro Posted July 30, 2008 Author Share Posted July 30, 2008 Understandable, but these appear to be rca interconnects for phono use (?): http://www.morrowaudio.com/ph1phonocable.htm DC Quote Link to comment Share on other sites More sharing options...
doctorcilantro Posted July 30, 2008 Author Share Posted July 30, 2008 I agree about the saltiness. And .1nF is probablywhat they mean; then it's about 33.33pF (about the same as my current cable). pico-farad(pF) nano-farad(nF) micro-farad(mF,uF or mfd) capacitancecode 10 0.01 0.00001 100 15 0.015 0.000015 150 22 0.022 0.000022 220 33 0.033 0.000033 330 47 0.047 0.000047 470 100 0.1 0.0001 101 dc Quote Link to comment Share on other sites More sharing options...
doctorcilantro Posted July 30, 2008 Author Share Posted July 30, 2008 Mike Morrow reports that "after re-measuring, they are .01nF per meter - so a claimed 3.3pF/foot. My question is, does one really need cap. that low? I happen to be using a low ouput Grado and wonder is there really any sonic benefit (with an already short cable run) given the acceptable ranges of capacitance above, say 30pF/foot. DC Quote Link to comment Share on other sites More sharing options...
LarryC Posted July 30, 2008 Share Posted July 30, 2008 'nother question: are moving coil carts sensitive to cable capacitance, or is this just an issue for MM's? Or is it an issue for them? Quote Link to comment Share on other sites More sharing options...
doctorcilantro Posted July 30, 2008 Author Share Posted July 30, 2008 IIRC, the weaker the signal, the more suceptible it is to the affect of high capacitance. A real shot in the dark here, could we say that the higher the capacitance, the greater becomes the wire's ability to impede and reduce the signal (bigger the battery the bigger the charge it can "hold"). I wondering if you start with 3pF and go up to say 75pF on one particular system, before real detrimental effects (coloration? distortion?) kick in, are we simply going to observe a change in gain; and would that be rather minimal or substantial given a low output .3-.5mv signal? dc Quote Link to comment Share on other sites More sharing options...
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