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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Mixer design as of now
2001-03-04 by Paul Schreiber
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