80B +-20 and 48v power supply schematic

Twenty five years have passed since Trident Recording Studios made the decision to build their own Multitrack Recording Console.

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80B +-20 and 48v power supply schematic

Postby charliebrewer » Thu Jan 07, 2016 11:40 am

I'm rebuilding an 80B and am looking for the power supply schematic for the analog supply.
I have the 5 volt meter and logic supply info, but this manual is missing the +- 20 volt and 48 volt supply data. Anybody have a schematic ?

I've repaired the +- 20 volt supplies, but someone totally butchered the 48 volt supply.
I'm replacing it with a Power One 48 volt .5 amp supply, but I need to rewire part of the chassis.
I want to disconnect the original transformer AC taps to the phantom supply to reduce unnecessary
current draw.

Thanks,

Charlie Brewer
Tech Services
102 Isaac Dr.
Goodlettsville, TN 37072
charliebrewer@comcast.net
charliebrewer
Analog Owner
 
Posts: 2
Joined: Wed Jan 06, 2016 2:49 pm

Re: 80B +-20 and 48v power supply schematic

Postby charliebrewer » Fri Jan 08, 2016 5:25 pm

I've figured out the PSU distribution and ground summing.
I've moved on and everything looks good so far, +-20 volt and + 48 volt supplies working fine.
charliebrewer
Analog Owner
 
Posts: 2
Joined: Wed Jan 06, 2016 2:49 pm

Re: 80B +-20 and 48v power supply schematic

Postby JimmyDavies » Tue Mar 08, 2016 10:13 am

May i know for which purpose you was looking for the 48V supply?
What components you used to make the 48V and the -20V together?
What is the meaning of 80B here?
Can you please share your schematics here?
JimmyDavies
Analog Owner
 
Posts: 1
Joined: Tue Mar 08, 2016 6:53 am


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