Cgs synth

Hey All -

Chub was good enough to send me some parts (xformers and diodes) so
I put together the Real RM on perfboard. It works! It does sound
different from my other ring mods (MOTM 110s) - not necessarilly
better, but different and GOOD. One more arrow in the quiver.

The value on the xformers is XL002 - maybe Chub can give better
details. Here's a newbie observation: the transformers have 3 posts
on both sides. I used the outer two to connect the jacks.

Mike

A little more detail-

Mike used four 1N60 diodes and two of Mouser # 42XL002 transformers.
This transformer has a 10K primary and 2K secondary. The transformer
page in the new Mouser catalog is 576. Ken's recommendation of
42TM018 is about twice the size (still quite tiny at less than a
cubic inch)and is 10K across the primary and secondary. Both
transformers are center-tapped on both sides. Mike's initial reports
have gotten my interest piqued, so I'm going for the 42TM018

I have a small quantity of old Ge diodes and I could have sworn that
I had a lot of 1N34's that I got recently. I'll keep looking...

Chub

--- In cgs_synth@yahoogroups.com, "Mike Marsh" <michaelmarsh@s...>
wrote:

Hey all!

Got a working RM using the Mouser transformer part #42TM018. This
differs from Mike Marsh's RM in that he used a micro transformer with
a lower secondary impedance (2K). Sounds prety much the same. I'm
following mine with a non-inverting amp and buffer arrangement using
a TL072 opamp. This will provide the makeup voltage gain of 2.5 -
though I'll probably go a tad higher and just use standard value
resistors for the amp.

Time to etch a pcb and drill a front panel as this definately has a
home in my synth! Let me remind you that I'll happily send out
quartets of reasonably matched germanium diodes to all who ask.

Enjoy!

Chub