Specifications

control is used; however, the appropriate attenua-
tion must be added to the Input Voltage (Horizontal)
Scale. For example, if the INPUT LEVEL control is
set to "5" aproximately 20 dB should be added to
the input voltage figures, so the point marked -60
dBV on the input voltage scale (Horizontal) would
become -40
dBV. In other words, the entire curve
would be shifted 20 dB to the right.
TO USE WlTH SHURE M68 SERIES MICROPHONE
MIXERS:
The two ways of using the M62V with the M68
Series Mixers are:
1. Connect a microphone directly to the microphone
input of the
M62V. Set INPUT IMPEDANCE
switch to appropriate position. Connect the mi-
crophone level output of the
M62V (Hi or Lo
Impedance) to a microphone input on the M68
mixer (either Hi or Lo Impedance, whichever
was selected on the
M62V). This method gives
audio "Level-Loc" control on the one micro-
phone attached to the
M62V
ONLY.
All other
inputs to the M68 are unaffected.
2. Connect the
M62V to control
ALL
inputs of the
M68 mixer, by connecting the microphone level
output of the M68 to the input of the
M62V, (if
the low-impedance microphone level output of
the M68 is used the
M62V input must be set to
"Lo Impedance," if the high-impedance micro-
phone level output of the M68 is used, the
M62V
input must be set to "Hi Impedance") or connect
the AUX.
HIGH LEVEL OUTPUT of the M68 to
the input (set for "Hi Impedance") of the
M62V.
(The INPUT LEVEL control may be used to con-
trol the threshold level as covered under "INPUT
LEVEL CONTROL.") The input for the main am-
plifier or tape recorder is then connected to the
M62V microphone level output (Hi or Lo Imped-
ance) or the AUX. OUTPUT. When used in this
manner, the MASTER CONTROL of the M68
Mixer should be set to about
"5"
and the indi-
vidual controls used to adjust the proper blend
between the channels. If more overall volume is
required,
the volume control on the main ampli-
fier should be advanced. This precaution will
prevent equipment overload.
TO USE WlTH SHURE M67 MICROPHONE MIXER:
Follow the instructions above for the M68, but only
the low-impedance input or output may be used when
connected to the M67. The setting of the M67 controls
only need be such that the VU meter indicates properly
to avoid overload.
TO USE WlTH SHURE M63 AUDIO MASTER:
Follow the instructions above but only the AUX.
OUTPUT of the
M62V may be used to feed the HI
LEVEL INPUT of the M63. The setting of the M63
VOLUME control will control the overall system gain
after the "Level-Loc".
OPERATION HINTS:
Remember that the M62V "Level-Loc" is a device
that provides a constant output level after a predeter-
mined input level (threshold) is reached, therefore,
if
more system gain is needed in PA applications or a
higher record level is desired in tape recording appli-
cations,
DO NOT INCREASE THE INPUT LEVEL GOING
INTO THE "LEVEL-LOC;"
once input threshold has
been reached the output level becomes fixed
IT CAN
NOT GO ANY HIGHER.
For more system gain, increase
the gain control of amplifier, preamplifier or tape re-
corder that is being fed from the
M62V.
Note:
For best results it is recommended that some
time be spent in experimentation with the
"Level-Loc" to enable the user to become ac-
customed to the advantages which this unit
presents.
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.
M62V Modification for
Non-disabling Aux. Output
The M62V may be rewired internally so that the AUX.
OUTPUT will operate (without "Level-Loc" action) when
the MASTER CONTROL is set to "Bypass", rather than
being disabled. This option is useful when the
M62V
AUX. OUTPUT is connected to the auxiliary input of the
M63 Audio Master or M68 Series Mixers. Note: With
this option, the
M62V power cannot be turned off by
the MASTER CONTROL switch. Power should be sup-
plied to the
M62V from an external source such as the
ACCESSORY 28 V. D.C. jack on the M68 Mixer or the
POS. (red) 30 V. D.C. jack on the M67 Mixer or M63
Audio Master, and the internal battery must be re-
moved.
To make this modification (see Figures 3 and
4):
1.
Remove battery from unit.
2. Remove cover from unit.
3. Unsolder and remove wire between MASTER
CONTROL switch S3, terminal #8, and terminal
strip end of 10 kilohm,
Y2
watt resistor.
4. Unsolder wire from S3, terminal #7, and solder it
to terminal strip end of 10 kilohm,
Y2
watt resistor.
5. Unsolder positive end of 2 mfd x 15 volt capacitor
from collector of Q3.
6. Connect a wire from positive lead of 2
x
15 ca-
pacitor to S3, terminal
#8.
7. Connect a wire from collector of Q3 to S3, ter-
minal #7.
8. Connect a wire from center terminal of INPUT
LEVEL control
R1 to S3, terminal
#9.
9.
Install a jumper wire between terminals
#4
and
#5
of S3.
10. Replace cover of unit, but do not install battery if
the
M62V is to be powered from an external
source.
MASTER
CONTROL
SWITCH
53
TERMINAL
DESIGNATIONS
(REAR
VIEW)