Shure 710S User Guide
222
HARTREY AYE EVANSTON.
HONES AND ELECTRONIC COMPONENTS
AREA CODE 312/328-9000 CABLE SHUREMICRO
ILL.
(60204)
U.S.A.
Low-Cost Crystal Microphones
DATA
SHEET
MODELS 710A,
AND 710s
"REX"
General:
sure operated diaphram type c stal microphones. The
crystal used is a Bimorph,
phones have high impedance, high output, smooth response, and a semi-directional pickup characteristic. The
Model "710" Series microphones have a sturdy dietast
case.
The models 7
ment on the table top, desk top, or other flat surfaces;
fit
they
a hand microphone; the microphones are provided with
a stand adapter having a
convential floor stand. The adapter attaches to the base
of the microphone by using the #8-32 machine screw
provided. Model
the microphone circuit. Model 710A has no switch.
Each of the microphones in the "710" series is provided with a
cable.
Applications:
designed for voice and music reproduction and are ideal
for amateur communications, home recording on disc,
tape or wire, fixed and mobile public address systems,
call systems, language lab system and similar applications. The "710" series microphones are rugged units,
are designed for dependability and are recommended
for use where
Connections:
cable should be connected to the grid of the first tube in
the amplifier across a load resistance of
put resistances as low as
sary, but higher values are recommended because of
better low-frequency response obtained. The shield
should be connected to the amplifier chassis or ground.
The shield, chassis or amplifier ground should be
securely grounded to a water pipe or similar ground to
prevent shock hazard during operation of the amplifying
system.
The cable may be lengthened
shielded microphone cable should be used for
purpose. Added lengths of connecting cable will be accompanied by a decrease in output level.
Operation:
crystal microphones.
Crystal microphones may be seriously damaged
accidentally connected to loud speaker or power supply
outlets carrying high voltage. Check your connections
carefully.
Crystal microphones should not be used or kept in
places where the temperature exceeds 125°F. They should
not be exposed to the rays of the sun in ve hot weather
for any considerable length of time -or eft in closed
automobiles parked in the sun during hot weather, as the
temperature inside the automobile may easily build up to
Copyright
271147 (1-67)
Model "7 10" series microphones are pres-
Roche 7 le salt unit. The micro-
10A and 7105 are suitable for place-
conveniently in the palm of the hand for use as
%"-27 thread which
710s has a built in switch to control
7
foot (2.lm) single-conductor shielded
Model "710" series microphones are
good quality
The inner or "hot" conductor of the
is
required at low cost.
5 megohms. In-
I
megohm may be used
if
desired; low capacity
fits
if
necec
the
this
No polarizing voltage is required for
7
1949,
Shure
Brothera,
Inc.
if
125O and
over
When use
mum length of cable consistent with placement requirements. Careful grounding of the cable shield is advisable.
ermanently damage the crystal.
cf'
near a radio transmitter, use the mini-
SPECIFICATIONS
MODELS
710 and 7105
Length .
Width .
Thickness (body)
Finish . . . . .
Net Weight
Shipping Weight . .
(with 7'
. . .
. . . . .
.
. . . .
. .
. .
. . . . . . . . . .
. . . .
. . . .
. .
. . . . .
.
(2.lm) cable). . .
.
. .
Voltage Sensitivity:
microbar at the end of a 7-foot (2.lm) cable across I to
5 megohms at 1000 c.p.s. This is equivalent to 50
below I volt per microbar at the terminals of the 7-foot
l
m) cable.
(2.
Frequency Response:
Internal Output Impedance:
900 micro-microfarad condenser.
Recommended Load Impedance:
Guarantee:
electrical and mechanical defects for a period of one year from
date of shipment from the factory, provided
complied with fully. In case of damage, return the microphone
the factory for repairs. Our guarantee is voided if the microphone
is
opened.
case
License Notice:
Each microphone
Shure patents pending.
33% (81.8mm)
.
2fB
(68.3mm)
I & (36.5mm)
. . .
Metallic Red
'
'Ib
(340g)
. . .
1
v4
Ib. (5679)
3.15 millivolts r.m.s.
60 to 9000 c.p.s.
Equivalent to a
1
to
is
guaranteed to be free from
all instructions
Printed in
6
megohmL
U.S.A.
p
e r
db
are
to
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