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Mixer design as of now

2001-03-04 by Paul Schreiber

Here is what I'm about to commit to for the mixer unless someone else
convinces me elsewise:

* 2U wide
* dual 3:1 or single 6:1
* it splits into dual mode when a jack is inserted into OUT 1
* DC path. Can mix AC and/or DC. Uses OP285GP amps. This is a lower
offset/drift version of the OP275GP
* Has a  -5V to +5V DC bias pot, which is switch in/out via panel switch.
Only offsets OUT 2.
* 2 reversing attenuators (1 in each mixer)
* NO 'master Gain' it takes a dual pot and I'm not going down that road
(like 18 weeks lead time).
* $169 kit/$229 assembled
*easy to build, no trimmers. About as hard as a '420 kit.

Well?

Also: I have some new Switchcraft 113 jacks for sale. The are like the 112As
except:

* single open circuit (doesn't have the 3rd shorting lug)
* has an isoloated N.O (Normally Open) switch (on 2 seperate lugs)

The mixer needs a 113E version, which has a N.C. switch (grrrrrr.....)

Regular about $2.50ea. I'll sell em for 10 for $8.00 That's cheap! You don't
*have* to use the switch :)

Paul S.

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