SB-953 MC-55 Change in Mic Element (T91-0328-08) 05/04/89 The new Mic element for the MC-55 comes in two pieces. One piece is a two pin ECM and the other piece is a spacer. The spacer is required as the new ECM is half the size of the old one. The wiring configuration is somewhat changed for the installation of the new Mic element. The figures below show the original configuration, the new configuration, and the assembly. The black wire is not used with the new ECM and a 330 ohm resistor is installed on the foil side of the microphone amplifier board. The leads of the resistor should be insulated with electricians tape or shrink tubing. (c) 103189TKC (If you need a copy of this modification leave a note to the SYSOP with your name and address and we will send one out to you.)