"Sequential Circuits Multitrak. I have replaced the battery and also did the battery drain fix modification so that the new battery will last 7 years instead of 3 months, you can see the picture of the battery mod i did. It is a common problem on most multitrak's the battery drains in less than 3 months. I also got a brand new custom made power supply built for the multitrak. These power supplies are not made anymore, they are rare and hard to find and to get a brand new one made would cost at least $200. I had mine built from a professional technician."
YouTube via ASUKLTD — April 25, 2010 — "Demo of modular analogue synth Tereshkova. This is identical to Vostok, except that instead of a matrix panel and VU meter you get 2 extra multiples, 2 extra VCAs and an extra LFO. Otherwise they are the same."