User's Manual

ManualsBrandsLectrosonics ManualsPro AudioSMV Super Miniature Wireless Microphone Transmitter

SMV Series

LECTROSONICS, INC.

3 WIRE MIC2 WIRE MIC

CAPSULE

SHIELD

AUDIO

SHIELD

AUDIO

BIAS

Alternate locations for bypass capacitors

TA5F

CONNECTOR

TA 5F

CONNECTOR

Preferred locations for bypass capacitors

Install the capacitors as follows: Use 330 pF capaci-

tors. Capacitors are available from Lectrosonics. Please

specify the part number for the desired lead style.

Leaded capacitors: P/N 15117

Leadless capacitors: P/N SCC330P

All Lectrosonics lavaliere mics are already bypassed

and do not need any additional capacitors installed for

proper operation.

Installing the Connector:

1) If necessary, remove old connector from microphone

cable.

2) Slide Rubber Boot onto microphone cable with the

large end facing away from the microphone. (See illus-

tration above.)

3) If necessary, slide the 1/8-inch black shrink tubing

onto the mircrophone cable. (This tubing is needed

for some cables to ensure the cable ﬁts snugly in the

rubber boot.)

4) Use the resistors and connector included with this kit

to conﬁgure the TA5F to your particular microphone.

(See Wiring Diagrams below.) A length of .065 OD

clear tubing is included if insulating the resistor leads

or shield wire is necessary. (Remove rubber strain

relief from connector backshell by pulling it out of the

backshell.)

5) Slide the Strain Relief over the TA5F Insert and

crimp as shown to the right. Then insert the TA5F

Insert and Strain Relief in the TA5F Latchlock. Screw

the TA5F Flex Relief onto the TA5F Latchlock.

6) If needed, position and shrink the 1/8-inch shrink tub-

ing on the microphone cable, then slide the Rubber

Boot down over the TA5F connector.

Microphone RF Bypassing

When used on a wireless transmitter, the microphone

element is in the proximity of the RF coming from the

transmitter. The nature of electret microphones makes

them sensitive to RF, which can cause problems with

the microphone/transmitter compatibility. If the electret

microphone is not designed properly for use with wire-

less transmitters, it may be necessary to install a chip

capacitor in the mic capsule or connector to block the

RF from entering the electret capsule.

Some mics require RF protection to keep the radio

signal from affecting the capsule, even though the

transmitter input circuitry is already RF bypassed (see

schematic diagram).

If the mic is wired as directed, and you are having dif-

ﬁculty with squealing, high noise, or poor frequency

response, RF is likely to be the cause.

The best RF protection is accomplished by installing RF

bypass capacitors at the mic capsule. If this is not pos-

sible, or if you are still having problems, capacitors can

be installed on the mic pins inside the TA5F connector

housing.

TA5F Latchlock

Insert

Insulator

Strain Relief

TA5F Backshell

with Strain Relief

Remove strain relief if

using dust boot

TA5F Backshell

(Strain Relief removed)

Dust Boot (P/N 35510)

Note: If you use the dust boot, remove the rubber

strain relief that is attached to the TA5F cap, or the

boot will not ﬁt over the assembly.

SMKITTA5 Connector kit for SMV series

transmitters, 5-pin TA5F plug with sleeve

Line Level Signals

The normal hookup for line level signals is: Signal Hot

to pin 5, Signal Gnd to pin 1 and pin 4 jumped to pin 1.

This allows signal levels up to 3V RMS to be applied

without limiting.

If more headroom is needed, insert a 20 k resistor in

series with pin 5. Put this resistor inside the TA5F con-

nector to minimize noise pickup.