Did Moog use a standard power supply unit for its modular synths? I know of two units, early and later models which have the grey box assembly
but would that be compatible with the larger 3 cab modulars using many modules.
What would be the minimum output current for the +12 and -6 voltage…the circuits state about 1.5amp 12v and 850ma -6…do the various modules draw
that much current? how far can you go adding modules?
There was no “standard” power supply back in those days. Moog designed their own.
Regarding current demands, I’m not a moog modular expert but I play one on TV. There are a couple of experts here though. 3, 2, 1…
3,2,1…0
This probably won’t display correctly formatted unless you’re using a proportional font (and even then), but here’s a list I made about 15 years ago.
It’s not complete, but might give you an overall idea.
All current draw is approximate and may vary depending on module settings.
It should also be noted that one should have some reserve current available.
Not just for future expansion, but also for heat.
A power supply being run at the limits will generate a lot of heat.
Heat is one thing you don’t need inside a Moog modular.
MODULE +12 -6
902 VCA 50ma 30ma
903A NOISE 20ma 30ma
904A VC 40ma 25ma
904B VCF 60ma 50ma
904C COUPLER 30ma 15ma
907 FIXEDFILTER 20ma 10ma
911 ADSR 30ma 15ma
911A TRIGDELAY 15ma 10ma
912 ENVFOLLOW 40ma 5ma
914 FIXEDFILTER 20ma 10ma
921 VCO 50ma 50ma
921A VCODRVR 10ma 10ma
921B VCO 40ma 40ma
923 NOISE 35ma 35ma
928 S/H 50ma 50ma
984 MIXER 25ma 25ma
960 SEQUENCER 300ma 40ma
961 I/O 100ma
962 SEQSWITCH 120ma 10ma
Wow that 960 sequencer draws a lot of power! Could easily halve it by replacing the vintage TTLs with 'LS variants…
For Kevin’s list of modules, the total power consumption for the +12v side is: 1.075 amps.
For -6v it is: 0.560 amps.
The Bode 1630 also draws a lot of current.
About 150ma on each 15 volt rail.
The 960 is filled with old DTL/RTL type logic that definitely suck current, but there’s not a lot of directly swappable chips avail.
Some of that current draw is also due to the incandescent bulbs used.
many thanx for your info particularly to Kevin, that list is very interesting..its going to help me quite a lot, I was concerned my cloned modular PSU was getting pretty warm , I I need to upgrade it to deal with ever increasing modules. I notice that Moog used the 723 but I guess there’s more options now…its just finding the most suitable one.
FYI and FWIW I think the Power-One brand supplies work really well and are relatively cheap brand new if putting into a modular (approx $100 to $250 depending on size) and dirt cheap if purchased used or New Old Stock (NOS) on Ebay (approx $15 to $75) I haven’t verified this but I think the NOS ones tend to hum a little louder under a load. The only DIY you’ll need to do is to add a power inlet, fuse holder and switch (Qualtek makes nice all-in-one units that I’ve used in most of my racks) and then wire the inputs and outputs up.
Power Ones are good.
But it should be noted that many different manufacturers offer basically same supply in most of the same mountings.
Same voltages and currents also.
It’s an industry standard design.
So Power One, International Power, Condor, Cherry all offer or have offered the same supply.
Yes, definitely! Thanks Kevin, I had intended to mention a few of those but i forgot! 
Another one that seems pretty decent is Sola (lots on Ebay):
http://www.solahevidutysales.com/pdf/powersupplies/SilverLine.pdf
I use a 5V Sola for the LED arrays I am working on for the backlighting in my modular. I use a 15V Condor adjusted to 12V output for the flashing lightning bolt that will be behind my transparent multiple module. Neither one of these have stable enough capacitors for the super fine tuning required in a modular. The Sola is the newer of the two and was NOS from 1981. If buying NOS, keep in mind that the caps and trimmers probably aren’t 100%. 
Be careful of Sola power supplies. At work we had several pieces of equipment where we removed Sola supplies because the excess ripple was causing problems.
Almost all of the Moog modular systems from around 1968 thru 1972 used the same basic power module, the model 910. There wasn’t a smaller or different size power supply on the standard models, so both the small system 10 to the large system III used the 910. Only larger custom systems like the CEMS, custom vocoder, or custom program preset systems needed a larger amperage supply.
Here is the standard grey box 910 module.
On the back of the portable systems I,II,and III were provisions for powering up to two extra portable cabinets, via 10 pin Amphenol connectors. (The two on the right)
The other three 8 pin Amphenol connectors were for powering keyboard/linear controllers that connected to the 3 CV and gate busses.
At the back of the extra cabinets was a 10 pin Amphenol to receive the power and CV buss. The 10 pins carried the +12,-6,-10, and ground, along with the buss CV 1,2,3, and the two 5v AC lines for the lighted indicator switches.
There was a seperate filament transformer for the 5V AC used for those lighted switches.
On the back of the 910 there were three 3-pin and one 6-pin Cinch-Jones type connectors provided for powering Moog accessories like the 958 pedal or 959 X-Y controller.
So in a “P” portable system there were power connections for two extra “P” cabinets along with three keyboard/ribbon controllers, and a few accessories. The smaller model 10 had fewer connectors on the back due to the trunk lines and fuses, so provisions for only powering one additional cabinet, and no 5V AC on the model 10.
The wood “C” models had a different power distribution. There was a single 12 pin Cinch-Jones to connect to the upper cabinet. The extra pins were for the S-trigger buss.
So in general usage the 910 powered Moog “P” portable systems had enough power for 6 CP panels and 48U space for standard modules. While the “C” wood console systems had power for 5 1/2 CP panels and 44U of standard modules. The marketing brochures noted that a small less expensive system, could be later upgraded to a larger system as needed. Since some of the various modules were double or more wide, there was not a module power connector for every 1U of space. But Moog usually provided an extra power connector behind a blank space, to power future add on modules. Standard power to modules was provided by AMP type 22 pin connectors, that also allowed pre patched configurations to be custom wired if needed.
All of the Sequencer complement cabinets, both “P” and “C” were fitted with their own seperate 910 power supply. So in a 4 cabinet “P” system with the extra sequencer cabinet there would be two 910’s. Same with a 3 cabinet “C” system with the sequencer compliment, would have two 910 power supplies.
From 1972 and on, with the introduction of the 921 series oscillators, the “P” cabinet model 12 and 15, were fitted with the 909 supply. Similar to the 910 without the -10 needed for the 901’s. And the newer Norlin era model 35 and 55 used the 930 supply with +12,-6,+15,-15.
thanks CZ, great pictures and appreciate the comprehensive info too…is there any information on the unit as to max output supply ..amps etc?