Brian Roth
Well-known member
Beware of caps sourced from a dicey source,,,,
Bri
Bri
Question about MCI power supply capacitors
- Thread starter astroman
- Start date
Help Support GroupDIY Audio Forum:
Rob Flinn
Well-known member
They are not op amps, they are logic chips. Dual D type flip flops to be precise. You probably don't need the "SN" type since they proabably don't operate at speed where timing is a consideration. Therefore there are plenty of non obsolete devices that you could use.
Brian Roth
Well-known member
IIRC, the SN prefix was TI's own choice. Other brands had a different or no letter prefix.
Nri
Nri
I've been keeping an eye out for these for my console.
I avoid chinese sellers now after several disasters with counterfet parts.
I've just stumbled upon these. The voltage ratings are higher, but is there any reason these wouldn't work?
Jaycar
https://www.mouser.com/c/passive-co...ic-capacitors|~Voltage Rating DC&sort=pricing
47-68-82-100-120-150-180-220uF axials in 16-50V ratings, and what's also in stock - pick your favourites, whichever physically fit
Plenty to choose from, as i see it
are they bi polar or non polar?https://www.mouser.com/c/passive-co...ic-capacitors|~Voltage Rating DC&sort=pricing
47-68-82-100-120-150-180-220uF axials in 16-50V ratings, and what's also in stock - pick your favourites, whichever physically fit
Plenty to choose from, as i see it
Ah, that detail i managed to miss...
Only one matching that description that Mouser have in stock is this:
https://www.mouser.com/ProductDetail/CDE-Illinois-Capacitor/107BPA016M?qs=3tP%2BN51vMXcmVaYjLpsFVA==
But, if need be, non-polar electrolytics can easily be substituted with a pair of double-value back-to-back series polarized electrolytics. It's actually more practical to use normal radial-package ones, which opens up waaaaaaaaay more options, and cheaper, too!
Ahh thanks.
and I guess certainly cheaper than the ones I linked to
and I guess certainly cheaper than the ones I linked to
MM1100
Well-known member
Hi - used Nichicon Muse non-polar for the entire console + wima for all the EQ’s so that every channel is now matched + master bus 990 mod + recap power supply. It took a while (I used a desoldering station to be careful with delicate traces) but now everything is sounding great and all my reliability and lack of low end issues with channels has gone away as a result. I am up to 9 John Hardy mic preamps (goal is 16) and use those for tracking.
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wow, that's a lot of work.
Looks great. Where did you find info on those mods?
Looks great. Where did you find info on those mods?
MM1100
Well-known member
Crazy but I bought my MCI JH-600 series that had been well used and aged already in 2004. So in the twenty years I have owned it, I have well spent the time in maintenance and mods and its running like new (maybe better than new) now. Same with the Ampex MM1100 16 track I use also well maintained. Solid stuff:
- Mark Richardson for the mix bus mod - amazing http://www.alchematic.com
- Steve Sadler (no longer with us) and Randy Blevins on the power supply maintenance MCI gurus Blevins Audio - analog recording equipment specialist
- Jim Williams on the EQ recomended mods on forums Audio Upgrades
- Sparkos Labs - opamp upgrades that will fit in small spaces Discrete Op Amps
- John Hardy - drop in replacement preamps http://www.johnhardyco.com/pdf/MPC600.pdf only $325 each new
- Doug Williams @emrr - on the bypass cap mods - major forum contributor || ELECTROMAGNETIC RADIATION RECORDERS ||
- @Brian Roth - for general history and maintenance info - thanks!
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MM1100
Well-known member
In memory of Steve
Thanks MM1100, that's some great info to look through.
My JH600 is my favourite moneypit
My JH600 is my favourite moneypit
