For those interested in the dissection and subsequent restoration of vintage analog organs, here a a few shots of my latest project, a '59 Wurly 4100 with model 300 rotary tone cabinet:</P>
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The tone generators, using tuned coils and 12FQ8 tubes with the divider circuitry. The aqua-colored things above are the sustain capacitors. It's impractical if not impossible to troubleshoot an organ like this without a tube tester and a donor organ.</P>
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Generator shelf lowered to the service postition. Tubes and can caps to the right are the amplifier. Someone at Lafayette Music put one over on the original owner and charged good money, I'm sure, for installing a Damp Chaser, the silver rod underneath the manual wiring.</P>
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The Model 300 Rotary Tone Cabinet with the cover off. It's the same case found on the Wurlitzer Sideman. All except higher frequencies are filtered out and I think returned to the main speakers. Notice the piston and flywheel assembly. It seems to dampen the signal once during each revolution of the dual 4" speaker assembly, accentuating the doppler effect. It has a unique sound, not at all unpleasant with this organ.</P>
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