Moog Music Forum

Yeah, that's it :D Questions: Do you have to remove the cards from the box to change CV settings? Why are there three potentiometers at the front of the cards? The reverb you used for your demo: Original spring reverb or something digital? The cards slide out and all controls can be reached so no &...

So here it is... my first time using the preset box which up to now has been over a year in the building.

I also made a section of a close-up of a card where I'm running through and adjusting all of the card parameters...

https://www.youtube.com/watch?v=WNwtmNOAdJY

Built the switching circuitry on all three cards and have started wiring one card.... it's took me three days to get this far and there's still loads to add and check..!

analogmonster wrote: ↑Mon Aug 16, 2021 5:45 am The only thing I still don't know is whether there might be problems in transporting audio signals concerning crosstalk and noise.

No audio runs through the 'D' connectors... it's all voltages & resistances - just like in Emo's... !

analogmonster wrote: ↑Mon Aug 16, 2021 2:02 am Seems that you got rid of the edge connectors and replaced them by D-SUBs - or are they just not visible on the pics?

Yes, I am using 'D' connectors. It wouldn't let me upload more than three photos... here's the one from the back of the box.

Test fit into the preset box of the three cards I have assembled. Just to check that my measurements were good and the cards don't foul each other. Also to get an idea of how easy it will be to 'programme' them in the 'slid-out' position. Not looking too bad overall... :D IMG_9145.JPG IMG_9146.JPG I...

So that's 2+1/2 cards populated... well, the 2 are not fully because there's still the switching cct to add in the space bottom left - and then there's loads and loads and loads of wiring to do. It's taken me the best part of two full days to get this far, what a job - Jeeez! 😳 Anyway, I'm making th...

Thought I'd try a rough layout of the bits which will populate a preset card. Ooooh... it's looking a bit cramped on there, even more so when you consider that I also have to fit a small (6 resistor and 4 transistor) circuit into that small free space bottom left. So I had to do a quick redesign of ...

So, basically having now built and interfaced everything with regards to the Moog Modular preset box - (except the preset cards and also the 901's, I'm still waiting on the FET from the USA for those...) - it occurred to me that I should maybe test out a few of the features. I could do that by repli...

He had at least 14 or more at one point. He has two preset boxes in some photos around 1972/3. Maybe he used the Moog a lot more around then, he did make lots and lots of different sound effects in the middle of Tarkus and Pictures around that time as can be heard on the boot-legs. His original box ...

Today I finished the preset box button selector unit.... and it's working nicely..!

https://www.youtube.com/watch?v=jRqs00c9PKg

This is good . Are you planning to make the information available ? ie circuit schematics etc ? I guess you put a lot of time and effort into this Can you tell us where the original information was located ? I can only think you had access to Keith’s stuff…choose what, great effort. No I'm keeping ...

analogmonster wrote: ↑Sat Jul 24, 2021 6:42 am Ah, that's good Is the wave shaper also redesigned? That would be a pity, as the old circuit added such a nice and smooth buzz to the waves I like very much.

Yes the wave shaper section is indeed retained - obviously Bob had the same opinion as both you and I...

How is the temperature stabilization done? Not with the diode arrays, I assume. And is the dual pot solution of the frequency vernier changed also? Yes, the complete oscillator section of the 901B is discarded so the dual pot is also gone. The new oscillator is on the piggyback daughter board. The ...