![Mad :x](./images/smilies/icon_mad.gif)
I'll crack it when I get it and check for inductors, etc., but prob'ly not, eh?
Otherwise, I'll re-sell it or mebbe try it on the bedroom stereo ... where I have Optimus 77 speakers on a old Advent receiver.
The 31-1986 and 31-1987 are five band EQs.pandemic wrote:...the 31-1986 (I believe) is a stereo, discrete, inductor based 7 band EQ with dual gang slide potentiometers. The 31-1987 is the same circuit (give or take) with individual controls for left and right.
http://www.radioshackcatalogs.com/catal ... ctory.html
Agreed!Mischievous Fabricated Nonsense:
--Realistic/Radio Shack "black face" seven-band EQ "from the 70s" with "no model number" that "didn't make it to the catalog" because it was a "prototype" with legending from "Neve/API" on the PCB, and which is so rare and must-have that nobody anywhere actually has one.
Go ahead, prove me wrong.
germaniac wrote:Facts:
--Realistic/Radio Shack models 31-1986, 31-1987, 31-1988 are five-band, all inductor, class A, single 44-volt rail. Identical circuits can be found in certain ADC/Teac Soundshaper models.
--Realistic/Radio Shack model 31-1989 is seven-band with the top three bands inductor-based, bottom four bands op amp gyrator-based, op amp signal path, +/- 15 volt rails.
Mischievous Fabricated Nonsense:
--Realistic/Radio Shack "black face" seven-band EQ "from the 70s" with "no model number" that "didn't make it to the catalog" because it was a "prototype" with legending from "Neve/API" on the PCB, and which is so rare and must-have that nobody anywhere actually has one.
Go ahead, prove me wrong.![]()
Joe
Derrick wrote:Nope, God I have seen. 16 pages of discussion, still nobody can produce a picture or model number of this EQ.
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