[Icom] Problem with ICOM HM-56 hand mic

[Ken]

Hi Jens. Interesting problem, other then checking the battery I'm not sure
what to do next, maybe try the mic on another 275H or 910H and see if the
problem follows the mic. Good luck, Ken

 
--- Jens Schmidt <j.schmidt@paradise.net.nz> wrote:
> Hi Ken,
> 
> I have looked at the reference list, and HM-56 is not listed
> as being compatible with my IC-275H or IC-910H.
> However, it works, as far as PTT, UP/DOWN, audio level
> is concerned, indistinguishable from the factory supplied
> HM-12. DTMF works correctly on both radios.
> I conclude, that the compatibility list is only what Icom
> will guarantee.
> My HM-56 does have battery to hold the DTMF memories.
> A wiring or circuit fault _could_ make it activate PTT line.
> 
> 73 Jens    ZL2TJT
> 
> Ken wrote:
> 
> > Hi, a couple of thoughts; is the mic compatible with your ICOM radio?
> > Check www.icomamerica/ click on "support" then click on "documents"
> and
> > finally "Microphone reference list" to see what radios this mic works
> > with. If it's compatible then I would check for a cable/wiring short
> or
> > shorted PTT switch, good luck, Ken
> >
> > --- W4ABW@aol.com wrote:
> > > Someone once told me that the HM-56 Icom mic had a small battery
> inside.
> > > They
> > > said a dead bat in this mic cud cause the associated ICOM
> > >
> > >  radio to Xmit as soon as the mic was connected, IE before the mic's
> PTT
> > >
> > > switch is depressed. I looked inside the mic and cud not find a
> battery.
> > > Any
> > > thoughts ?
> > >
> > > thanks and 73
> > >
> > > Al
> > > W4ABW
> > >
> > >

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