MOOG OPUS 3. after repair and midi installation

video upload by Alexey Taber

"Now, MIDI pitch bend and LFO modulation are possible from a virtual LFO with 5 waveforms. Modulation to a cutoff and MIDI clock sync to the built-in LFO are also possible. I will post the details of the operation at https://boosty.to/alexey_taber and donate to me for coffee there https://boosty.to/alexey_taber/donate"

Formanta UDS VS Formanta Rockton

video upload by Alexey Taber

Rmif ELSITA - repair/mod/midi

video upload by Alexey Taber

WERSI BA-900 repair/midi

video upload by Alexey Taber

Bass Bot.mod with BA662

video upload by Alexey Taber

via AMSynths:

"The BA662 is a custom made DC controlled variable transconductance amplifier (or OTA) that Roland had manufactured by Rohm from 1978 and is now obsolete and very expensive. There are two types of chip with different suffices; the A version has been selected for lower offset than the B version. They are further classified by gain/gm. The BA662B can only replace another BA662B, whilst an A can be used in either application.

To quote Roland from the 100M Service Manual: 'color has great importance in the circuits of some models'. However there is nothing mystical about the sound of the BA662, it is just a reasonable good OTA chip which is often carefully matched and selected."

And via Sunshine Jones:

"The Roland BA662A VCA chip is the Voltage Control Amplifier IC from the Roland SH-101, TB-303, Juno-60, JX-3P etc. which is a part of what makes it sound so wonderful. These can also be found in the Jupiter-4, the Jupiter-8, and MKS-30,50 and 80. They have counterparts – The Roland BA662B (B stock versions of the A) and also a cousin IC the BA6110 which is similar, and looks virtually identical under a scope, but the power comes from negative rather than positive, and so it won’t work exactly the same way."

rare Synton Syrinx after repair and mod

video upload by Alexey Taber

Check out the AnalogFX SER-2020 for a modern take on the Synton Syrinx.

Roland System 100.after repair and midi instaled

video upload by Alexey Taber

AELITA .rare soviet synth after repair

video upload by Alexey Taber

Estradin-314 - Solaris - after repair witn Vermona Re-Tube

video upload by Alexey Taber

Polivoks Pro sequenced + Cooper FX Generation Loss

video upload by alternatingbitmusic

"Alexey Taber and Alex Pleninger Polivoks Pro sequence via Doepfer Dark Time run though a few pedals for some extra coloring (not that the Polivoks Pro needs any!)."

Elektronika EM-25 produced in the Soviet city of Kherson.Another one repaired and installed midi

video upload by Alexey Taber

rare soviet transistor organ Yunost-70 after repair/midi installed play with vintage EH Small Stone

video upload by Alexey Taber

Polivoks. repair/croped keyboard/midi installed

video upload by Alexey Taber

rare soviet string-organ Elektronika Em-04 test after repair and instal midi with some CC controls

video upload by Alexey Taber

YAMAHA SS30 - installing midi,part II

video upload by Alexey Taber

part 1 here

YAMAHA SS30 - installing midi

video upload by Alexey Taber

SN 1695

Part II here

ECHOLETTE NG51 test after repair with Electronika EM-25

video upload by Alexey Taber

Elektronika EM-20. test after repair and midi instalation

video upload by Alexey Taber

Arp Odyssey II.test new midi with dual voices

video upload by Alexey Taber

another Alice 1387

video upload by Alexey Taber