Don't force a regular (RJ-45 type) 8-wire plug into the mike jack of a CDM radio, unless you never plan on using the DTMF mike made for those radios. That's because the CDM radios use a 10-wire mike jack, and the shoulders of the 8-wire plug will deform the two outside wires in the jack that are used for row and column selection in the DTMF mike. It is very difficult to bend back the outside wires, once they've been damaged. The DTMF mike for the CDM radios does not contain a tone generator like most DTMF mikes; instead, the button positions are fed into the radio where the tones are generated internally.
73, Eric Lemmon WB6FLY -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of MCH Sent: Friday, July 30, 2010 9:22 PM To: [email protected] Subject: Re: [Repeater-Builder] Re: 420Mhz Radio for Voter? <snip> They share the same programming cable, although most Motorola mobiles do. Hence, the same microphones. <snip> Joe M. >> Tim - WD6AWP wrote: >>> Are the CDM's similar to the Radius M1225?
