Shure SE20 User manual

monaural source to one channel of the SE20, the SE20
input should be shunted with a 47,000 ohm resistor
or the high frequency trimmer should be readjusted for
proper high frequency equalization.
Outputs: Output terminals appear on the rear panel as
shown in Figure
C. Outputs are balanced and designed
to feed a
150 ohm or 600 ohm line.
REAR PANEL
FIGURE
C
Channel Level Controls: These controls are located on
the front panel designated as “Channel A Level” and
“Channel
B Level.” They are used to adjust the overall
operating level of the
SE20 and to balance the individual
levels of the two channels.
Response Trimmers: To allow for balancing the
response of the two channels
of a stereo cartridge, or
of two monaural cartridges, high and low frequency
response trimmers are provided for each channel. Figure
D shows the location of these controls and Figure E
shows the range and character of the response change
obtainable.
LOW FREQUENCY TRIMVER
HIGH FREQUENCY TRIMMER
t20
fl -
110
z
w (0
0
go
Lz
w
$-I0
a
_I
w Lz
-20
20 50 100 1,000 10,000 20,000
FREQUENCY IN HERTZ
TYPICAL EFFECT OF RESPONSE TRIMMERS
FIGURE
E
220 Volt Operation: The power transformer may be
restrapped for operation with
220 volt A.C. supply. To
make this change, see instructions on schematic for
revising power transformer connections.
Guarantee: This Shure product is guaranteed in normal
use to be free,from electrical and mechanical defects
for a period
of one year from the date of purchase.
Please retain proof of purchase date. This guarantee
includes all parts and labor.
Shipping Instructions: Carefully repack the unit and
return
it prepaid to the factory. If outside the United
States, return the unit
to your dealer or Authorized
Shure Service Center for repair. The unit will be re-
turned to you prepaid.
1
RESPONSE TRIMMERS
SIDE VIEW (COVER REMOVED)
FIGURE
D

I
jlfiTSklM, 15KHZ-R23
30HZ
- R25
3. ALL RESISTORS 112 WATT 59 CARBON COMPOSITION
UNLESS SHOWN. POTENTiOiETERS
20% TOLERANCE.
2.CHANNEL
"n" IS SHOWN, 4.ALL NON -ELECTROLYTIC CAPACITORS
IN MFD. 10%
CHANNEL'B" IS IDENTICAL AND '100 VOLTS OR MORE UNLESS SHOWN.
TO CHANNEL "A': ELECTROLYTIC CAPACITORS SHOWN IN MFDXVOLTS
(TOLERANCE,-I0
f50 UNLESS SHOWN).
MODEL SE20 STEREO TRANSCRIPTION PREAMPLIFIER SCHEMATIC