Dynacord Leslie Simulator complete schematic

[StephenGiles]

http://www.keyboardpartner.de/hammond/diagrams

Look under Leslie. I'd like to see a circuit description as there is a mass of good building blocks in there.

There is a plethora of interesting bedtime/bus or train to work reading in there. I think some of the ciruits might benefit from printing on A3 paper.

[George Giblet]

Which one is the simulator?

They all look like rotaries.   Here's the index page,

http://www.captain-foldback.com/Leslie_sub/leslie_schematics.htm

[StephenGiles]

Which one is the simulator?

They all look like rotaries.   Here's the index page,

http://www.captain-foldback.com/Leslie_sub/leslie_schematics.htm

Click on Leslie and then Dynacord CLS 222

[George Giblet]

OK thanks.

I went through part of the circuit but haven't finished the TDA volume chip parts.  I'll try to find a manual.
I think these aim to modulate the directional aspects of the rotating speakers. Also haven't back-engineered the clock/modulation parts to determine the relative phasing of the delay modulation vs the directional modulation.

Basically it split the audio path into low and high bands, modulates all aspects of these "speakers" separately then mixes the
two paths back together again.

Here's a a quick summary which matches the block diagram:


*High-Pass Section (HT)

I001      LPF, 9.4kHz, Anti-Aliasing
I002      HPF, 510Hz,  Crossover HPF, Treble Boost ~ 1kHz (I001 gyrator)
I017/IO18   Short Delay, 2xParalled/Interleaved Delays
R096/R097/R099   Mixer for Dry + Each Short Delay
I002      Reconstruction Filter (9kHz)
I021      Volume modulation**
I022            Acoustic path/directional modulation.**
I005      HPF, 36Hz, feedthrough reject filter


* Low Pass Section (TT)

I002      LPF, 590Hz,  Crossover LPF (also Anti-Aliases)
I019/IO20   Long Delay, 2xParalled/Interleaved Delays
R122/R121/R127   Mixer for Dry + Each Long Delay
I002      Reconstruction Filter (1.9kHz)
I021      Volume modulation **
I022            Acoustic path/directional modulation. **
I005      HPF, 36Hz, feedthrough reject filter


** these items not fully back-engineered

[DougH]

http://www.diystompboxes.com/smfforum/index.php?topic=69200.0