Shure R7 User Guide
Ins8al9a+iew
Crysfail
and
Connec+ion
Microphone
Ilns+ruc9ioses
RepBacerarsenQ.
for
Model
(=ar+rislqe
R7
ring.
its
~h~
above
installed
chanical shocks and handling.
Model R7 may be used as a replacement in the Shure Models 707A, 708A,
718A and similar microphones. Also, model R7 may be used as a roplacement in competitive models of such size and shape as will receive the
rubber mounting ring. The rubber mounting ring may be modifiod to
certain microphone cares by buffing, cutting, etc. to desired size without
impairing the performance of the cartridge.
In most instances, a two-wire circuit (single conductor shielded cable) is
used to connect the cartridge. The inner or "hot" conductor should be
connected to the terminal designated
the shield or ground conductor should be connected to the terminal desig-
nated "B". Care must be taken not to injure the crystal in the cartridge
due to applying excessive heat to the terminals when soldering the con-
necting leads.
then
soldering iron. Cool
soaked in
27A50
figure shows the model R7
into
a microphone, this rubber ring provides isolation from ma-
the
(6-68)
The cable leads should be cleaned and carefully tinned:
soldering operation should be performed rapidly with a hot
immediately after soldering with swab or cotton
alcohol.
rubber
"A"
in illustration shown above and
Copyright
When
fit
1949.
SPECllAL
Hiqh
(2.
1
m) cable.
Oufpu*:
50.0
Excellen+ Frequency
Rising high frequency characteristic for maximum intelligibility.
Model
R7 utilizes a Bimorph, Rochelle Salt crystal.
Model R7 crystal replacement cartridge is shipped
its rubber mounting ring to facilitate installation.
Guarantee: Each replacement cartridge is guaranteed to be free from
electrical and mechanical defects for a period of one year from date of
shipment from factory, provided all instructions are complied with fully.
DO
MOT EXPOSE
HUMBDIITY!
This Shure cartridge
tected from temperatures above
humidity. Optimum results will be obtained
microphone is stored in enclosures having a temperature around
a humidity of
under conditions of high temperature and humidity, the Shure "Controlled
Reluctance" Model R5 replacement cartridge is recommended. A
unit may be seriously damaged
power outlets carrying high voltage. Check your connections
Shure Brothers,
DO
is
a Rochelle Salt crystal device and should be pro-
50%.
For replacement in microphones intended to be used
Inc.
INFORhWATlOkl
db below I volt per microbar at end of 7 foot
WeSpornSe:
80
NOT
if
50
te
lo,oOO
cycles per second.
pre-assembled into
HIGH
APPLY
125"
accidently connected to loud speaker or
TEMPERATURE AND
F.
HIGH
(51.6"
VOLTAGE!
C)
and from excessive
if
the crystal cartridge or
SO0
Printed
F.
crystal
carefully.
in
U.S.A.
\
,
and
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