• PIN 1 Shield for positive biased electret lavalier microphones. Bias voltage source for negative biased electret lavalier microphones. Shield for dynamic microphones and line inputs. This pin is also used as the antenna input on VHF models and should not be attached to the connector body.
  
• PIN 2 Shield (ground) for negative biased electret lavalier microphones. Bias voltage source for positive biased electret lavalier microphones.


• PIN 3 Low impedance microphone level input for dynamic microphones. Also accepts hand-held electret microphones provided the microphone has its own built-in battery.


• PIN 4 1K ohm source load for non-Lectrosonics electret microphones. Use in conjunction with other pins to provide attenuation of high level input signals.


• PIN 5 High impedance, line level input (when pin 4 is jumpered to pin 1) for tape decks, mixer outputs, musical instruments, etc.

Caution
On the VHF models do not use the connector body for any electrical connections. A common mistake is to use the connector body as an audio ground. The connector body is already used as an RF ground on the VHF models and no other use is permitted.

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 (see schematic diagram).

If the mic is wired as directed, and you are having difficulty 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 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.

• Leaded capacitors: P/N 15117
• Leadless capacitors: P/N SCC330P

Body Ground