RECOMMENDED MICROPHONE WIRING
Wiring Information for MICRON 500.x Series Transmitters

Pin Numbers
All connections to the 8-way Lemo plug FC 2308 are numbered by the Micron system, which numbers the connections clockwise when looking at the pin and socket end of the microphone plug. The sockets are numbered 1 to 4, and the pins are numbered 5 to 8. Disregard any numbers that may be visible on the Lemo inserts.

Signal Phase
• UHF systems (Transmitted frequency above 300 MHz) The "Normal Phase" wiring given in this list will give the same signal phase, at the receiver main output, as that from a hard-wired microphone.

• VHF systems (Transmitted frequency up to 300 MHz) The "Normal Phase" wiring given in this list will give a signal phase, at the receiver main output, which is inverted with respect to that from a hard-wired microphone. (Use the "Inverted Phase" wiring, where available, to get normal phase output from a VHF system.)

RF Suppression
RF suppression capacitors may be required on some units. A 390pF chip capacitor is effective for VHF and an 18pF at UHF - we recommended that both are fitted.

When pin 7 is used, fit 390pf and 18pf capacitors in parallel from pin 7 to 6.
When pin 3 is used, fit 390pf and 18pf capacitors in parallel from pin 3 to 4.
When pin 2 is used, fit 390pf and 18pf capacitors in parallel from pin 2 to 6.

Sensitivity
The figures shown in brackets, against the microphone details, below are the approximate sensitivity of the microphones in dB, relative to that of a Normal Phase-wired Sony ECM-55.

Please note
The connections given in this list are for the latest TX500.X series transmitters, which have their metal case connected to the battery supply negative. The older models - TX101, 102, 501 & 502 - were positive earth, and may require different wiring with some types of microphone. Please refer to your original handbook or contact us (sales@micronwireless.co.uk) if in doubt. Similarly, if you are a user, supplier or manufacturer of a microphone type that is not listed here, please get in touch.

AKG
CK 67-3 Normal Phase (-2.5)
5,6 Screen
7 White

CK 77-3 Normal Phase
5,6 Screen
4 Blue
3 Red, fit 5.1k resistor, 3 to 8.

CK 97-C Noise cancelling microphone
5,6 Link
4 Screen and Red
3 Blue, fit 5.1k resistor, 3 to 8.

C 407 Normal Phase (-15)
5,6 Screen
4 Blue
3 Red, fit 6.8k resistor, 3 to 8

C 407 Inverted Phase (-12)
5,6 Screen & Red
7 Blue

C 417
5,6 Screen
3 Red, fit 5.1k resistor, 3 to 8.

C 420 / B
5,6 Link 2 Screen, fit an extra suppressor capacitor, 2 to 5,6
3 Red, fit a 12k resistor, 3 to 8.

Audio-Technica
AT 831aW Normal Phase (-7)
5,6 Screen
4 Both Yellow
3 Both Red, fit a 6.8k resistor, 3 to 8

AT 831aW Inverted Phase (-15)
5,6 Screen
3 Both Yellow
8 Both Red

MT 350/B (also MT 350/IV)
5,6 Link
4 Screen
3 White, fit 6.8k resistor, 3 to 8

MT 830 Normal Phase (-3)
5,6 Screen
4 White
3 Red, fit 6.8k resistor, 3 to 8

MT 830 Inverted Phase (-4)
5,6 Screen
4 Red
7 White

Beyerdynamic
MCE 5 Normal Phase (-3.5)
5,6 linked
4 Outer screen
3 Core (green)
8 Inner screen

MCE 10.xx (All versions known to 28/11/96) Normal Phase
5,6 linked
4 Screen
3 Red & White, fit a 4.7k resistor, 3 to 8

Brüel & Kjær
DPA 4060 - B (also -F, -W)
5,6 Screen
3 Red, fit 8.2k resistor, 3 to 8.

DPA 4060 - B (also -F, -W), High sensitivity
5,6 Screen
1 Red, fit 8.2k resistor, 1 to 8.

COS - see Sanken below

Countryman
EMW* (xEMWxxxxx all variants) Normal Phase (0)
5,6 Screen
4 Green enamel core
7 Red enamel core

EMW* (xEMWxxxxx all variants) High sensitivity, Inverted Phase (+20)
5,6 Screen
4 Green enamel core
1 Red enamel core, fit a 6.8k resistor, from 1 to 8

EMW* (xEMWxxxxx all variants) Inverted Phase (+13)
5,6 Screen
4 Green enamel core
3 Red enamel core, fit a 6.8k resistor, from 3 to 8

* This is a provisional connection, as detailed information on the EMW is not available.

WCM16 (aka Shure WCM16) Normal Phase 5,6 linked
4 Screen
1 Green enamel core, fit 24k resistor, 1 to 4
8 Red enamel core WCM16 (aka Shure

WCM16) Normal Phase, Low sensitivity. 5,6 linked
4 Screen
3 Green enamel core
8 Red enamel core

Knowles
VR Series Headset Microphone BJ-8473.
5,6 Screen
7 Grey

Lectrosonics
All Models
5,6 linked
4 Screen
3 Core, Fit 6.8k resistor, 3 to 8

Sanken
COS 11 and COS 11 PT Normal Phase (-7)
5,6 Screen
4 White
3 Black, fit 6.8k resistor, 3 to 8

COS 11 and COS 11 PT Inverted Phase (-4)
5,6 Screen & Black
7 White

Sennheiser
MKE 2, MKE 2R, MKE 2-3 Normal Phase (-7)
5,6 Screen
4 Blue
3 Red, fit 6.8k resistor, 3 to 8
Fit 6.8 µF 10v tantalum electrolytic capacitor, -ve to pin 6, +ve to pin 8

MKE 2, MKE 2R, MKE 2-3 Inverted Phase (-4)
5,6 Screen & Red
7 Blue

MKE 2-2R Normal Phase (-2)
5,6 Screen
4 Blue
3 Red, fit 6.8k resistor, 3 to 8
Fit 6.8 µF 10v tantalum electrolytic capacitor, -ve to pin 6, +ve to pin 8

MKE 2-2R Inverted Phase (-1)
5,6 Red
7 Screen & Blue
(Not recommended, as screen is connected to signal input)

MKE 40 Normal Phase (-7)
5,6 Screen
4 Blue
3 Red, fit 6.8k resistor, 3 to 8

MKE 40 Inverted Phase (-5)
5,6 Screen & Red
7 Blue

MKE 102 Normal Phase
5,6 Screen
4 Blue
3 Red, fit 6.8k resistor, 3 to 8

Shure
SM 83 Normal Phase (-8)
5,6 Screen & Red
7 Black

SM 83 Inverted Phase (-4)
5,6 Screen
4 Black
3 Red, fit 6.8k resistor, 3 to 8

WCM16 - see Countryman WCM16

WH 10 Dynamic Headset Microphone
5,6 Screen
4 Black
1 Red

WL 93 Normal Phase
5,6 Screen
3 Black
8 Red

WL 183, WL184 and WL185 Inverted Phase
5,6 Screen
3 Red, fit 6.8k resistor, 3 to 8
4 Black

Sonotrim
STRML (negative bias version, unmarked case)
5,6 Screen
7 Core

Sony
ECM 30 Normal Phase (-11)
5,6 Screen
7 Red

ECM 30 Inverted Phase connection NOT recommended.

ECM 50 (early 2 wire type) Normal Phase (-6)
5,6 Screen
7 White

ECM-50PST (-6), ECM 55 (0), ECM 77 (-1) Normal Phase
5,6 Screen & Red
7 White

ECM-50PST (-8), ECM 55 (-3), ECM 77 (-2) Inverted Phase
5,6 Screen
4 White
3 Red, fit 6.8k resistor, 3 to 8

Telex
22, 33 Normal Phase (-4)
5,6 Screen
4 Black & White
3 Red, fit 6.8k resistor, 3 to 8

22, 33 Inverted Phase (0)
5,6 Screen & Red
7 Black & White

22, 33 Inverted Phase (-7)
5,6 Screen & Black
3 White
8 Red

TRAM
Serial No. up to 10,000 (Screen + 3 wires) Normal Phase (-14)
5,6 Screen
4 Black
3 Red, Fit 6.8k resistor, 3 to 8
White, no connection

Serial No. up to 10,000 (Screen + 3 wires) Inverted Phase (-12)
5,6 Screen & Red
7 Black
White, no connection

Serial No. 10,000 onwards (Screen + 1 wire) Inverted Phase (-10)
5,6 Screen
7 White
Normal Phase connection for this version is NOT recommended.

Current production 1995 (Screen + 2 wires) Normal Phase (-12)
5,6 Screen
4 Black
3 Red, fit 6.8k resistor, 3 to 8

Current production 1995 (Screen + 2 wires) Inverted Phase (-10)
5,6 Screen & Red
7 Black

Trim
Normal Phase
5,6 Screen
3 White, fit 6.8k resistor, 3 to 8

Voice Technologies
506 Normal Phase
3 Green
5,6 Screen
8 Red


  Wiring details and interface information for Micron products in the field.