MOTM

From: thomas white <djthomaswhite@...>
1.Attenuator module with 0-10 attenuator and a
reversible attenuator or two, maybe with an inverter
on the bottom as well.
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From: CHRIS PARKER <cparker@...>
Some utility functions I've thought about are:
4.  Attenuators/Reversing Attenuators/Inverters
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From: Dave Bradley <daveb@...>
Utility modules:
2. analog inverter or reversible attenuator
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I just finished a DIY dual reversing attenuator on a small (but nice)
protoboard.
It has 2 ins and 4 outs.  INs are 1, and err... 2
Outs are 1, 2, mix(+) and mix(-)
The individual outs can be wired to be included or
excluded from the mix (when jacked).  You can have
one each way or both the same.

The two pots are standard MOTM spacing.  Since it is only 2U high, it can be
mounted in a standard 1U panel with the jacks below, or on a 2U high panel
with jacks to the side, or even 1U with jacks to the side.   Price of ALL
the components including the 6 switchcraft jacks and 2 Bournes 91A (normal
MOTM quality) pots and circuit board is about  $25.  Add knobs and metal
panel to that.

This might hold some of you over until some official MOTM  stuff comes out.
I plan to put it at my site, but the server is down right now.  *&^%$@#!*
So, mail me if you want a photo of the proto-type.

I have two other small utility projects I want to do on this same board.

After I built this one, I thought the same parts could make just a plain
nice dual reversing attenuator with two outputs on each channel and no
mixing.  The two outputs would be 180 out of phase so that even though you
have the attenuator as reversing, you have both normal and reversed outputs
at the same time.  So the 4 outputs would be 1+ and 1- and 2+ and 2-. I find
I like to have LFO signals both positive and negative at the same time going
as control voltages.  While you can get that using a multiple and inverter,
this method makes both signals attenuated the same.

And, I also thought about adding a switch for 2x or 3x gain since it is
normally a unity gain attenuator only.

Anyhow, none of this is rocket science (or I could not do it.)  But, it was
easy and fun.

Larry H