[sdiy] Passive Ring Modulator

[Steve Begin]

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
> 
> 
>