Lectrosonics MM400b - Manual (Page 15)

Watertight Miniature UHF Belt-Pack Transmitter
Microphone RF Bypassing
Some mics require RF protection to keep the radio
signal from affecting the capsule, even though the
transmitter input circuitry is already RF bypassed.
If the mic is wired as directed, and you are having
difficulty with level, 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
possible, or if you are still having problems, capacitors
can be installed on the mic wires inside the TA5F
connector housing.
Install the capacitors as follows: Use 330 pF capacitors.
Capacitors are available from Lectrosonics. Please
specify the part number for the desired lead style.
2 WIRE MIC
Preferred location for bypass capacitors
CAPSULE MICROPHONE
CONNECTOR
SHIELD
AUDIO
Alternate location for bypass capacitors
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.
Rio Rancho, NM 15