No.
135
DATA SHEET
transmission of high frequency sounds, contribu-
ting greatly toward improved intelligibility
without overloading the power stage of the amp-
lifier.
SPECIFICATIONS
Voltage sensitivity:
2.36 millivolts r.m.s. per
bar at the end of a 25-
foot cable across 1 to 5
megohms at 400 cycles. This is equivalent to
32.5 db below 1 volt for a 10 bar signal at the
end of a 7 foot cable.
Internal Output
Impedance:
Equivalent to a 1,500 mic-
ro-microfarad condenser.
Recommended Load
Impedance:
1/2 to 5 megohms.
Model . . . . . . . . .
750B
Height, Overall (a)*. .
4-7/16"
Height, Case
(h)*. .
3-13/16"
Width
(b)*. .
2-3/4"
Thickness
(c)*. .
1-7/8"
Finish . . . . . . . . .
Iridescent Gray
Net Weight. . . . . . .
Shipping Weight.. . . .
14 ounces
1 lb. 3 ounces
Code Word . . . . . . .
RUSEL
* See Fig. C.
Fig. C. Overall Dimensions 750B microphone, and
Mounting Bracket (Hanger A Included as Standard
Equipment, Stud B, on special order).
GUARANTEE:
Each microphone is guaranteed to be
free from electrical and mechanical
defects for a period of one year from
date of shipment from the factory, provided all
instructions are complied with fully. In case of
damage, return the microphone to the factory for
repairs. Our guarantee is voided if the micro-
phone case is opened
LICENSE NOTICE:
Shure patents pending. Licensed
under patents of the Brush De-
velopment Company.
Fig. B: Frequency Response 750B
