Hello, some friends and I are building the EM Theremin by Moog and we are running into some issues. Please if anyone in this forum have built this theremin can you please share some advice on what to look for and what to avoid. This is for a class project and we have to complete it before the end of the semester.
One big issue that we are currently facing involve the pitch antenna range. We followed the procedure in Moog paper as far as construction but need help with the antenna.
this is an image of our antenna fixture we use for testing. https://www.dropbox.com/s/2bg6g7yq79f73hz/20120831_130019.jpg
I read up some things mentioned by Thierry here http://thereminworld.com/Forums/T/28530/antenna-tuning?Page=3
He mentions that the VPO frequency should increase (+5kHz or so) when the antenna circuit is connected to it. This doesn't seem to happen in our case. We are using an 18'' antenna with diameter 3/8'' as suggested in Moog's paper.
Please any help will be appreciated.