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hi, i have replaced the main ps 470mf 35v caps on my Marantz cd 67SE DC Player using a couple almost, new 6800 mf 80v jamicon caps i had from a toasted sub amp. the particular list of mods i am following said to use 6800mf 35v but, i had these other caps just laying around so i thought i would give them a try. of course, they were to large to mount in pc board so, i used mirror tile double sided tape to mount them as close as i could to the original mounting points. my question is, the 18 guage stranded copper wire i used is around 4 or 5 inches long. will these length of leads degrade the performance of these caps? i have placed two .1mf stacked film panasonic caps on bottom of board per, main cap. i also put a .01mf orange drop cap across the leads of the 6800 mf caps themselves, at the other end of the leads. should i maybe use some ferrite beads on these leads also? or maybe twist the leads? i plan to get some maybe, 4700 mf. 35v caps that will fit the board later on when i can. i've also, replaced the rectifier diodes for the analogue and, digital supplies with some 10 amp 100v. schottky diodes i had on hand as samples. i'd be very greatful for any advice! Thanks
Follow Ups:
From what I read it looks like you have paid attention to the details with the bypass caps. I may be going out on a limb here, but I would think that once the cap is charged the wire becomes a part of the tank/reserve. I believe that there may be additional inductance based on the wire, but overall it should work and yield sonic benefits.Of course you could optimize the mod with more esoteric caps and ones that fit the board, but that would take some of the fun out of immediately implementing the modification.
hi DaveT, yes i seem to hear more details, and a tighter bass. Thanks for your help!
but you would hear it if it was affecting you.The very short charging pulses from the rectifiers to the capacitors are now flowing through a piece of wire in free air.
There is potential for this to be radiated into low level areas of your amp and result in 100/120Hz buzz/hum.
If you can't hear it you ain't got it!
hi Clifff, i see what you are saying but, i don't hear anything like you are refering to so, maybe it will be alright. i plan to try and at least, upgrade to some ELNA SILMIC OR CERAFINE CAPS later on maybe, i can get something about 4700mf. 35v. range that will fit the foot print of the board. Thanks for pointing that fact out to me though! i learn something new every day seems like lol!.
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