- 3 -
INPUT CONNECTING PROCEDURE
The inherent hum and noise voltages applied to the input of the Audio
Compensator are -110 DBM, or less than 3 microvolts. To avoid lowering the sig-
nal to hum ratio of the Audio Compensator, by adding hum voltages to the input,
extreme care must be taken in its installation. We offer the following recommenda-
tions as a guide to installation:
1. Connect inputs of Audio Compensator as outlined on the table below.
CHANNEL
1 & 2
3
4
5
FOR USE WITH
AM-FM Tuners
Wire Reproducers
Tape Reproducers
Crystal or Ceramic
cartridges
Crystal Microphones
Low Impedance
Microphone
High level Magnetic
cartridges. (Termi-
nated for Pickering
cartridge)
Low level magnetic
cartridges or ampli-
tude responsive
cartridges such as
FM or ceramic
INPUT
(FOR 2.5 V. OUTPUT)
MIN. MAX.
70 MV. 20 V.
10 MV. 1 V.
30 MV. 150 MV.
10 MV. 50 MV.
GAIN
32 db
50 db
40 db
50 db
REMARKS
Input levels in excess
of .07V should be re-
duced by potentiometers
on back panel.
Input levels in excess
of 10 MV should be
reduced by potentiom-
eter on back panel.
See text for operation
of these channels.
The Audio Compensator and magnetic phonograph cartridges should
be mounted at least two feet from power transformers.
Inter-unit cables provide a complete ground system. Alternate
ground wires create ground loops which will usually increase hum
level.
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