RSF Kobol/Expander -1978     Weight = ? Lbs. Number manufactured = >200/800rack MSR = $?


User Manual:
Reset Proceedures: N/A
Operating System code:
MIDI or other control protocol:
Software related Links:
Patches or knob settings:
Circuit Overview: below
Scematics/Service Manual:
Common Service Issues/Tips: below
Parts Sources: Keys knobs semiconductors misc
Uncommon chips/modules used: uA726 in VCO, SSM2040 VCF, SSM2050 EG, CA3080 OTA
Modifications:
General Info Links: Vintage Synth Explorer or Polynomial





















Circuit Overview:
      16 memory CV/gate controlled 2VCO 1LFO 2xADS eg. monosynth with 2-8step sequencer facility. Here is a letter:

Bob,

Wanted to pass this on to you, it was sent to me
from Tony, at Oakly Modular.:

RSF KOBOL

The VCA is just an ordinary CA3080 with an op-amp
 output stage.

The VCF is the SSM2040 and the EGs are SSM2050.

The VCO is a discrete/op-amp affair with a very
 complex waveshaper for 
the variable shape output. The NPN pair in the
 VCO's exponential 
convertor is the temp controlled uA726.
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Service Tips:
      Never worked on one.


Parts:
Not sure what all might be in these yet. Ask if you need a specific part.
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