No title link. Just the two shots and details pulled via this auction.Details:
"Up for bid, a 2430 Ring Modulator vintage analog synthesizer module by E-mu. PCBs are date coded 1974. Info on the E-mu modular can be found at emulatorarchive.com - also the following info is copied from the official E-mu literature from the 1970's:
The Eµ 2430 Ring Modulator is a balanced modulator for electronic music. It contains an Eµ 1430 ring modulator submodule. The module has two inputs, modulation and carrier, which are identical for high signal levels. The output is the algebraic product of the input voltages:
Vout = Vmod x Vcar ÷ 5
when the input attenuators are fully clockwise and the coupling switches are in the DC position. AC coupling will level-shift the corresponding input so it effectively centers around zero volts. This can have a striking effect on the output signal, due to the inherent non-linearity of balanced modulation. The Eµ 2430 was designed for high carrier rejection in the absence of a modulation signal, typically in excess of 80dB. The reverse rejection, that of modulation feedthrough with no carrier, is only 40dB.
Power Requirements: ±15 V @ 10 mA typical
Firm-wire Patch Connections:
Inputs - Modulation, Carrier
Outputs One (3 pins)
Power Bus Connected Inputs: None
Adjustments: Gain
Modulation Rej'n - Mod positive
Modulation Rej'n - Mod negative"
Update: Not directly synth related, but you might want to check out the seller's "KORG Univox EC-100 Stage Tape Echo Delay by Unicord" as well. That was a mouth full. linky
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