Moog Music Forum

Hello,
I have a System 55, with a PSU I am not satisfied with. Can you please say what the Power One PSU model you have used for your modular?
Regards

Fernando

Great advices!
Removing the problem relocating the PSU can be an interesting operation.
THANKS
I shall let you know the advances

Fernando

I hear a "hum" coming from the transformer of my MOOG System 55 PSU (930). After recapping it and tightening the bolts keeping the transformer pack together little has changed. The low freq noise comes definitely from the transformer, like a mechanical vibration. Moreover, being the modula...

Hello,
I am slimming my collection down and this is a perfectly working Don Martin era Moog VCO. Details here.

http://www.ebay.com/itm/MOOG-modular-95 ... 3cd1650238

Ciao from Italy

Fernando

After replacing the electrolytic caps, I am going to calibrate the trimpots in the 930 Power supply module of my Moog system 55. Honestly, the instructions are not that clear to me. Apart from regulating the correct voltages by means of the related pots, the rest, i.e. current limit and ovp adjustme...

Last calibration to be done in my system 55 (before sending the ... temperamental modules to the K... ing L for a careful check) is the one reported in the object. Honestly, I am not a tech, neither am I totally analphabetic (low level english, but sufficient), but I believe that who wrote the manua...

Thanks Kevin, your explanations are always very exhaustive. As to the replacement resistors, are you referring to the couples near the transistors like Q8/9 and Q11/12?

In the process of calibrating my Moog 55, I abandoned for the moment the early 911 EG problem (see my previous post). Now facing the 902 calibration, I have seen that the procedure is quite tricky. The major difficulty is with the DC output bias. After the whole calibration process completion, as de...

Kevin,
I shorted the T1 pot, but nothing changes.
I guess something was changed (the Philips cap is not original, IMO) but without a schematic diagram it is very difficult to understand what...

Hi all I am calibrating my Moog 55. One of the 8 EGs is completely different from the usual ones. It is a very early version, with more components / caps, no trimpots at all, no possibility of calibrating offsets, glitches etc. It is dated May 3 1968 on the yellow tag. I have not found any clue or s...

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Hello, I am new on this list (although a long-time AHer... :-) I paid more than 600 $ to Mike Bucki in order to get a Moog Module made, much more than 1 year ago. He was not that prompt in his replies, much less in his production time. But now I am really worried, in that I am sure that I am experie...