Roland SH3A synthesizer fixer upper 70's - Black/yellow

Roland SH3A analog synthesizer non functional !

For fixer upper !

DIY new wooden case, very nice !

All the parts are there and I recapped all the PCB's.

The synth goes on, you here the LFO and the parameter pots are working. Noise generator works, Filter works but no VCO.

Schematics are online !

Beautiful project for the rainy days !

Thank you for watching and if you have questions, let me know !

Specs :

ManufacturerRolandDates1975– 1976specificationsPolyphonyMonophonicTimbralityMonotimbralOscillator1 VCO, 1 White/Pink Noise GeneratorLFOLFO1 has sawtooth waveform, LFO2 sine or square and delay slider, Sample-and-Hold with level and sample time sliders. LFO's can be assigned to VCF, VCA, VCO.Synthesis typeAnalog SubtractiveFilterResonant self-oscillating low-pass filter w/ frequency and resonance controlsAttenuator1 ADSR Aftertouch expressionNoVelocity expressionNoStorage memoryNoneEffectsNoneInput/outputKeyboard44 keys (F–C)

The SH-3A is a monophonic analog synthesizer that was manufactured by Roland from 1975 to 1981.[1] It is unique in that it is capable of both the usual subtractive synthesis and also the less common additive synthesis, offering mixable waveforms at different footages. Two LFOs and a unique sample-and-hold section provided capabilities not found in competing self-contained synthesizers of the time. The SH-3A was Roland's first non-preset based synth. The predecessor, the Roland SH-1000, could also do this but didn't offer as much control as on the SH-3A. The rhythmic pulsing in the Blondie song "Heart of Glass" is an example of its sound.

Contrary to common belief, the initial version "SH-3" did not infringe on the transistor ladder-filter patent of Robert Moog. It used a diode filter like the EMS VCS 3. The SH-3A does use a transistor ladder-filter and as a result can generate Moog-like sounds.