McIntosh C108 -, Instruction Manual

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- 3 -
6. Follow steps 4 through 9 above.
7. Adjust the hum centering potentiometer on the D-101
for minimum hum.
8. Follow steps 11 and 12 above.
INPUT CONNECTING PROCEDURE
The inherent hum and noise voltages applied to the input of the C-108 is
-110 DBM, or less than 3 microvolts. To avoid lowering the signal to hum ratio
of the C-108 by adding hum voltages to the input, extreme care must be taken in
its installation. We offer the following recommendations as a guide to installa-
tion:
1. Connect input to C -108 as outlined on the table
below.
CHANNEL
1 & 2
3
4
5
FOR USE WITH
AM-FM Tuner
Wire Reproducer
Tape Reproducer
Crystal Pickup
Crystal Microphone
Low Impedance
Microphone
High Level Magnetic
cartridges. (Ter-
minated for
Pickering Cartridge)
Low Level magnetic
c a r t r i d g e s .
( T e r m i n a t e d for
Audax polyphase
c a r t r i d g e and
W e a t h e r s FM
c a r t r i d g e . )
INPUT
(For 3 v. output)
Min. Max.
. 1 V 20 V.
12 MV. 60 MV.
30 MV. .15 V.
12 MV. 60 MV.
GAIN
30 db
48 db
40 db from
T u r n - o v e r to
20,000 c p s .
48 db from
T u r n - o v e r to
20,000 c p s .
FREQUENCY
RESPONSE
(20-20,000 c p s . )
+ . 2 5 db
+ .25 db
Rises at the
r a t e of 6 db
per octave b e -
low turn-over
frequency to
20 c p s .
REMARKS
Input levels in ex-
c e s s of . 1V should
be reduced by
potentiometer on
back panel.
Input not to exceed
60 MV.
C a r t r i d g e of other
manufacturers may
be used but input
must be terminated
as recommended by
manufacturer. Alter
R6 & R7 o r R 8 .