[AH] Paia Synthespin?

[J. Larry Hendry]

Hmmm...  I wonder if this is the same circuit as the PAiA Leslie simulator
oublished in Popular Electronics in the early 70s?  I have a copy of that
here "somewhere."

Larry Hendry
----------
> From: Paul Perry <pfperry at melbpc.org.au>
> To: synth-diy at mailhost.bpa.nl
> Subject: Re: [AH] Paia Synthespin?
> Date: Thursday, December 10, 1998 4:29 AM
> 
> At 12:02 AM 10/12/98 -0500, Tim Johnston  wrote:
> >Anybody know what a PAIA Synthespin is? 
> 
> There is a ckt for this (and other PA1A stuff) in
> "electronic music curciut guidebook' Brice Ward Tab 1975
> it isn't a REALLY rare book
> 
> Uses a LM3900 Norton quad.
> Has a lfo driving a transistor to vary a bandpass filter,
> the (out of phase) output from which is summrd with the input
> to give a phaser effect.
> 
> SPEED this is the LFO speed control
> 
> ACCENT this is 'depth' or 'intensity' of efect
> 
> SPAN as far as I can see varies the freq range of activity
> 
> CENTRE I think is the centre of freq control, with SPAN at max 
> you use this to 'phase' manually
> 
> There are SPEED and CENTRE CV inputs in the rear, with 0-9v range.
> 
> paul perry melbourne australia 
> Frostwave Quad rackmount midi-cv convertor back in stock for Xmas ;-)
>