I know this message is almost a year old, but the mic in question (589-7600-022) is actually a re-labeled Icom HM-100T, even though it says EF Johnson and Product of Transcrypt on it. I use it (the EF Johnson one) on my Icom IC-2100H. I picked it up off eBay for like $10 NIB to rewire to a Midland 70-0520C Syntech II(still gonna). Wish I had bought a few more.
--- In Repeater-Builder@yahoogroups.com, Mike Morris WA6ILQ <[EMAIL PROTECTED]> wrote: > > I'm looking for a schematic for a EF Johnson DTMF > microphone, model number 589-7600-022. > > Also, does anybody know what radio they are used on? > And the pinout of that radio's microphone jack? > > Mike WA6ILQ >
