Vintage RCA Broadcast Audio, 3 Section Variable Equalizer Set, c.1962

Description

* Set of 3 RCA "Variable Audio Compensator" modules based on bridge "T" (constant resistance) design using precision Ls, Cs, and Rs.
* Each module measures 4-1/2"L x 1-3/4"W x 3-1/4"D.
* MI-10143-L, high frequency equalizer features a 7 position switch to raise/lower signals below 2KHz in approximately 3dB increments.
* MI-10143-M, mid frequency equalizer is a shelving filter and features a 7 position switch to raise all frequencies either below 200Hz or above 3000Hz, in approximately 3 dB increments.
* MI-10143-H, high frequency equalizer features a 7 position switch to raise/lower signals above 500Hz in approximately 3 dB increments.
* Input/output impedance for each module is 600 ohm, unbalanced
, overall frequency response is flat from 26Hz to 20,000Hz
,
* While L and H modules have 10dB insertion loss , the M module has 7db loss.