So far, about dozen people expressed interest in this module.
Surprisingly, it seems that everyone agreed with my proposed panel
layout, so I will go ahead and pass it along to Moe.
A mounting bracket is in the works, and is being addressed in a
parallel thread on this list.
Someone asked if I was putting together kits, but I don't see the
point. This module uses readily available parts, and buying the
PCB's and panels directly from Ken and Stooge Inc. seems easy enough.
Now, if enough people tell me that they want kits, I'll do it. In
any event, I will put together a parts list and post it to the list.
I'm still open to IC suggestions to maximize tuning precision. We need:
1) Single-packaged very high-impedance op-amp for the sample & hold.
Ken used LF356, and suggests a CA3140 which has an input impedance of
1.5T!! The problem is that Digikey and Mouser do not stock CA3140.
Jameco and JDR sell them, but then shipping gets expensive.
2) A pin-for-pin replacement or best version of 4052 mux. We want
channel matching and low RON.
3) A quad-package op-amp as an input/output buffer. Ken uses a
TL074. An LT1014 is the quad version of the dual op-amp MOTM
typically uses for DC precision (1013), but the 1014 is not
particularly good at handling capacitive loads (such as patch cables)
without additional circuitry that the CGS PCB does not provide.
However, there are op-amps with built-in capacitive-load handling. I
just haven't had the time to look.
>Isn't one of the '500 series modules going to perform full-on ASR functions?
>If so, I am surprised this is being discussed here. I may be TOTALLY wrong
>though, so....
Huh?? I'm all for supporting MOTM, but please, let's be realistic.
Paul S. said something about the Rhythm Wheel, but I have no idea
what it does, or whether or not it could replace a dual ASR. Nor is
there anything about it on the website. So a better question might
be, by the time they ship, will our gorilla overseers will allow us
to keep them??
The CGS ASR is an inexpensive DIY module. A dual unit costs less
than $100 to build. I severely doubt that could have any effect
whatsoever on the sale of an expensive digital module that might be
available sometime next year.