[ICOM] HM-154T mic

[Patrick - KB8RTZ]

Hello, Tom.

I don't have a schematic, but do have a question about your radio. What model do you have the microphone connected to?

I have an IC-718 and connected to it an SM-20 desk mic. The up/down buttons didn't work on it, either. Turned out that when the radio was set to use the mic up/down buttons as an electric keyer the frequency up/down function on the mic was disabled. When I disabled the electronic keyer function it enabled the mic up/down keys to change the frequency.

Maybe your radio is in the same mode?

73...Patrick...

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On Feb 11, 2015, at 20:49, Tom WA9WSJ via Icom <icom at mailman.qth.net> wrote:

Hello Gents,

Does anyone have a schematic for the Icom HM-154T microphone?

I've looked allot on the internet but not found one.

The up/down buttons do not work on mine. The lock and the up/down switches are good as well as the continuity of the rj45 connector to the pc board of the mic. 

thanks,

Tom




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