[sdiy] Passive Ring Modulator

[Ken Stone]

I used to use ringmods like this. 4 germanium diodes and a couple of surplus
signal transformers ripped out of old transistor radios. They are awesome.
Mismatched transformers will unbalance the effect, which can be worth
experimenting with.

Ken

At 11:29 AM 7/12/02 -0400, Steve Begin wrote:
>Hi, I'm new to the list, not new to analog (am I gonna get in trouble if I
>spell it like that?)
> gear, but fairly inexperienced when it comes to circuitry.
>
>I've got a question, has anybody had any experience with a passive ring
>modulator design like this one?
>http://www.sonicstate.com/synthfool/ringmod.html
>
>I'm interested in it since it looks very easy to make and cheap and if it
>doesn't work as well as other designs it doesn't bother me that much.  
>However,  I guess the stancor a-4713 driver transformers are no longer in
>production and I can't seem to find anything information on them at all, let
>alone a reference to a part I could use as a substitute.
>I'd really appreciate it if somebody could give me any direction at all
>here.  
>
>The other thing I was wondering about (and I'm sure it's probably painfully
>obvious to a lot of you) was half or full normalled patch bays.  When you
>split a signal doesn't it affect the impedance or something along those
>lines?  I thought it would be a bad thing to do but I haven't seen anybody
>mention any problems with that.  
>How about combining signals without a mixer?  I'm almost positive you get
>problems doing that.
>
>Thanks!
>
>> Steve Begin
>> 
>> 
>> 
>
_______________________________________________________________________
Ken Stone   sasami at hotkey.net.au  
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
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