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coupling the Model 507B to the input of a high imped-
ance amplifier. A two-conductor shielded cable may
be used for extending only the microphone circuit.
If both the microphone circuit and the remote circuit
are to be extended, a four-conductor cable should be
used having two shielded conductors for the micro-
phone circuit.
The microphone circuit of the Model 507B is nor-
mally open when the microphone switch button is in
the normal position. The microphone switch may be
rewired to have a normally shorted microphone circuit.
To modify the Model 507B for a normally shorted
microphone circuit, proceed as follows:
1. Remove the three No. 6 Phillips self-threading
screws from the back of the microphone case.
2. Separate the case front and back, and remove
the microphone switch button.
3. Unsolder or clip the WHITE cable lead from
upper (from bottom of microphone) switch solder
lug (see Figure 2).
4. Solder the WHITE cable lead to the lower switch
solder lug (containing the YELLOW lead to the
microphone cartridge).
5. Place the microphone switch button in the normal
position on the case front. Place the case back
on the case front and firmly press the two sec-
tions together. Fasten the case back to the case
front with the screws previously removed.
OPERATION
The Model 5078 will operate very satisfactorily under
all ordinary conditions of humidity, heat, and cold.
Dropping the microphone or other severe mechanical
shocks should be avoided.
SPECIFICATIONS
TY pe
Dynamic
Frequency Response
100 to 5,000 Hz (see Figure 3)
6
-
+I0
Z
-
s
o
C
W
c j
-I0
W
L
L
I
I
I
I
l I l l l l l
I
I
l l l l l l l
I
J
20
50
100
lpO0
lO.000
Pop00
FREQUENCY IN HERTZ
TYPICAL FREQUENCY RESPONSE
FIGURE 3
Output Level (at 1,000 Hz)
Open Circuit Voltage*
. . . . . . . . . . . . . . . . .
-39.0 dB
(11.2 mV)
Power Level**
. . . . . . . . . . . . . . . . . . . . . . .
-
58.0 dB
*O dB = 1 volt per 100 microbars
**0 dB = 1 milliwatt per 10 microbars
Impedance
Microphone rating impedance is 150 ohms (200 ohms
actual) for connection to microphone inputs rated
at 19 to 300 ohms
Switch
Double-pole, single-throw, leaf-type
Cable
Attached, recoils to 0.3m (1 ft), extends to 1.8m (6 ft)
Case
Two-tone gray and charcoal ARMO-DUR@
Dimensions
See Figure 4
(I-49/64 INJ
- I
44.mM
r
OVERALL DIMENSIONS
FIGURE 4
Net Weight
312 grams (11 oz)
Packaged Weight
510 grams (18 oz)
FURNISHED ACCESSORY
Mounting Bracket
.........................
RK6MB
REPLACEMENT PARTS
Cartridge
...................................
R50
Switch
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
90A3507
Cable
...................................
70A4110
GUARANTEE
This Shure product is guaranteed in normal use to
be free from electrical and mechanical defects for a
period of one year from date of purchase. Please
retain proof of purchase date. This guarantee includes
all parts and labor. This guarantee is in lieu of any
and all other guarantees or warranties, express or
implied, and there shall be no recovery for any con-
sequential or incidental damages.
SHIPPING INSTRUCTIONS
Carefully repack the unit and return it prepaid to:
Shure Brothers Incorporated
Attention:
Service Department
1501 West Shure Drive
Arlington Heights, Illinois 60004
If outside the United States, return the unit to your
dealer or Authorized Shure Service Center for repair.
The unit will be returned to you prepaid.
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