Quote:
Originally Posted by sweetbeats
I put up a thread awhile ago about my thoughts about cleaning pots and I tend to do what I have to do to gain
access to each pot body so I can turn the pot sideways and jet cleaner in through the holes in the pot body,
sweep the pot and another jet to rinse. You want to get any crud off the wiper too...ain't gonna happen trying
to get cleaner in from the top.
Excessive? Sure, but I was repulsed at the idea of doing the work to try and get the stuff in there and have it
not take, and that was my experience doing it the other way with my M-520, which is what led me to my
current methods.
I don't know if I read that thread. Did you desolder and open the pots? I dreaded desoldering and opening the 14 pots
per channel which would have been 56 pots per quad channel module or 448 pots alltogether not counting the master
section. Maybe I'll do it, if a pot really resists and can not be cured by that method. Then again I could just order that
pot and replace it.
Quote:
Originally Posted by sweetbeats
Caps...you're not asking but here are my thoughts after recapping a whole bunch of stuff...on a board the age
of the M-3500 I'm not sure I would recap anything except for the PSU (it is responsible for ensuring clean
power to the rest of your mixer, and dirty or unstable power is hard on everything else downstream...I have
no quantitative data to back this up, okay? But clean power has been demonstrated to have meaningful
advantages), -OR- if you are having problems and it seems cap related. But I'd recap the PSU. I use Nichicon
PW series caps. Affordable, reliable, well-made and readily available. Cheap quick job to recap that PSU.
That's exactly what I was thinking. I don't want to "overdo" it. The pots (even those in the PSU) look still nice enough
and the console is not that old. I'll measure the PSU and then maybe I'll change those electrolytics or I'll do it just to
be on the safe side and get some soldering practice again, but I won't do the board as it is really loking good. I'll keep
you posted
Quote:
Originally Posted by sweetbeats
Could you hear the difference if you did the whole board? Maybe, but I'm telling you I couldn't do it...I'm tired
of recapping, and I've never done anything as big as that mixer. That's...a...lot...of...caps. I love your idea and
highly recommend the "do a couple channels and A/B them" plan. Very revealing.
I don't think I could do it either. Maybe some differences when you change decoupling caps in gain stages of a very
simple HiFi tube amp. I used some different caps in my tube amp project and thought I could hear a difference. But I
also thought I could hear a difference with different rectifier tubes. People tell me that's to be expected, but I'm
always inbetween "can't measure, can't tell" and "believe it sounds different". Maybe it's a psychological thing like
washing your car and feeling it runs smoother afterwards Some day I'll pull the opamps though and A/B them. You
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