Hi All!
i’m here cause i need some help in building my theremin.
i found an article in Electronic Muscian 1994 (i think) where Bob Moog explained how to build a theremin! as i’m into music equipment building i gave it a try.
Unfortunately i found out that there are 2 components i’m having problems with.
That’s why i hope you can help me out.
Could anyone take a picture of L5, L6 and L11 on the PCB?
i don’t have a real schematic, so i’m doing everything myself but i cannot understand how those inductors are connected on the board.
I know many of you can think i should buy a kit or something directly from Moog but i really want to have this done, myself!
I do not have the means to take these pictures as I am missing the theremin in question. As in, I don’t have one. However, I admire your audacity and borderline insanity for taking on this feat. Good luck!
I scanned these for you but then I remembered that if you go to the products page for the Etherwave Theremin, under Manuals, youll see the users manual as well as the guide that tells you all about “Hot Rodding” your theremin. It includes schematics and how you can add pitch and volume CV’s to your theremin as well as other good stuff. http://www.moogmusic.com/manuals/HotRodEtherwav.pdf
Moog is cool like that, always encouraging people to get elbows deep in their gear. I think Bob wanted everyone to learn how to work on his instruments themselves.
Thanks for your help!
unfortunately i already had those prints..
the problem is that where L5, L6 and L11 are located, you only see two threads. The components on the other side have at least 5 pins!
sorry if i was not clear enough..
hope soemone has the answer i’m looking for!
Just to be more specific..
this is what i you can find on the schematics i have.. the same you can download from the moog site..
this is what the schematic says.. just 2 connections.. (by the way i have an older print with other values for these components but it’s the same stuff anyway!)
but..
this is what the PIN Diagram says: 5 Pins!
as i still couldn’t find these 2 components i’m not sure how they look like (that’s why i asked for a picture of them
hope i cleared things up. i know my first question was not so explanatory.. sorry!
well.. i trust in you!
I find it interesting that there would be 3 contact points that seemingly go nowhere. If there were only two I’d assume it would be a resistor or capacitor. Since there’s three I’m not sure what to make of it. A picture would indeed end this mystery. If there are no other connections, I assume that there are multiple coils on those particular inductors, and those “pins” are the contact points for the additional coils. Just a very wild guess, and I’m probably wrong.
Okay, I’m getting my components mixed up, but it appears to be a non-trimmable coil with various taps for different frequencies - so only two connections need to be made if you only need one frequency.
Yes, I see that. I’d gone to look at the component spec sheet though; it didn’t actually prove to be all that informative. Though I found a good price if you need 10,000…
However, I admire your audacity and borderline insanity for taking on this feat. Good luck! 
