ike hi,
Back to the elite 40 channels 1986 humming issue.
i recapped and refurbished both psu,i changed connectors to NL8 and i
measured 17v on motherboard, so thats fine.
the two psu are connected parallel for the whole console(not like some
modes made ,one psu for each side of the master section).
The mixer is quite when all channels muted.
The hum (about 50hz) appears when channels are ON (faders down) and is
present on all channels.
reading this:
If / when you re-do the PS connection at the board end, it's a good
idea to put in some de-coupling caps on the supply voltages where they
come into the console. About 4700-5600uf at 35-50 volts is good for
the +/-18v rails (two caps total), 1,000uf / 50v for the -25v rail,
100uf / 100v for the +48v rail. The 36 volt rail is kind of optional
but use at least a 50v cap, preferably 63v if you put something across
it.
Best,
ike
Hi Barak,
Two power supplies makes it WAY more complicated than that.
You might want to check with Mike at Sytek and see if he will trade
your power supplies for an upgraded one that will run the whole
console. Otherwise, we have some talking to do...
I will send the NL-8 pin-out when I get a chance to look for it.
best,
Ike
i still didn't try option one (caps mode on the board side)... thought
you can advice...
Thanx
Barak Koren
