SSB

[John Speth]

I just purchased 4 AD633 (Low cost analog multiplier) from Newark Electronics for something like $6 each.  (I find Newark good for finding hard-to-find chips but you gotta pay big.)  I got the data sheets with application data from AD's web site.  The chips are well integrated and simple to use.  The offset nulling circuit is a simple resistor/divider type with a pot.  I haven't used them yet but I think 2% max error could be no big deal for musical applications.  

I wonder how a 2% multiplier error translates into the output (ideal vs. actual) for the freq shifter?

John Speth
johns at oei.com

-----Original Message-----

Nope - I built it all on two or three (can't exactly remember)
vectorboards. But hey, that's a good idea! Maybe someday.... does anybody
out there know what multiplier chips are readily available from Analog
Devices these days? I suspect that some of them (AD532 etc.) are out of
production or superceded by now, and that will affect the layout. It's been
a while since I've talked to the Hamilton rep and I don't work at the job
where the old contacts were anymore.