Ins8al9a+iew and Connec+ion Ilns+ruc9ioses for Model R7
Crysfail Microphone RepBacerarsenQ.(=ar+rislqe
SPECllAL INFORhWATlOkl
Hiqh Oufpu*: 50.0 d b below I volt per microbar a t end o f 7 foot (2. 1 m) cable.
~h~ abovefigure |
shows the model R7 |
itsrubber |
ringWhen. |
installed intoa |
microphone, this rubber |
ring provides |
isolation from ma- |
chanical shocks and handling. |
|
|
Model R7 may b e 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 o f such size and shape as will receive the rubber mounting ring. The rubber mounting ring may be modifiod t o fit certain microphone cares by buffing, cutting, etc. t o desired size without impairing the performance of the cartridge.
Excellen+ Frequency WeSpornSe: 50 t e lo,oOO cycles per second.
Rising high frequency characteristic for maximum intelligibility.
Model R7 utilizes a Bimorph, Rochelle Salt crystal.
Model R7 crystal replacement cartridge is shipped pre-assembled into its rubber mounting ring t o facilitate installation.
Guarantee: Each replacement cartridge is guaranteed t o b e free from electrical and mechanical defects for a period o f one year from date o f shipment from factory, provided all instructions are complied with fully.
DO MOT EXPOSE 8 0 HIGH TEMPERATURE AND HUMBDIITY! DO NOT APPLY HIGH VOLTAGE!
This Shure cartridge is a Rochelle Salt crystal device and should be pro-
I n most |
instances, a two-wire circuit |
(single conductor shielded cable) is |
||
used t o |
connect the cartridge. The |
inner or "hot" conductor |
should |
be |
connected t o the terminal designated |
"A" in illustration shown |
above |
and |
the shield or ground conductor should be connected t o the terminal desig-
nated "B". Care |
must be taken not t o |
injure the crystal in the |
cartridge |
due t o applying |
excessive heat t o the |
terminals when soldering |
the con- |
necting leads. The cable leads should be cleaned and carefully tinned: then the soldering operation should b e performed rapidly with a hot soldering iron. Cool immediately after soldering with swab or cotton soaked in alcohol.
tected from temperatures above 125" F. (51.6" C) and from excessive humidity. Optimum results will be obtained if the crystal cartridge or microphone is stored in enclosures having a temperature around SO0 F. and a humidity of 50%. For replacement in microphones intended t o be used under conditions of high temperature and humidity, the Shure "Controlled
Reluctance" Model R5 replacement cartridge is recommended. A crystal unit may be seriously damaged if accidently connected t o loud speaker or power outlets carrying high voltage. Check your connections carefully.
27A50 (6-68) |
Copyright 1949. Shure Brothers, Inc. |
Printed in U.S.A. |
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