Archive of the former Yahoo!Groups mailing list: MOTM
Subject: Mixer design as of now
From: "Paul Schreiber" <synth1@...>
Date: 2001-03-04
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.