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Spectra 900Mhz Mobile Questions

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Spectra 900Mhz Mobile Questions

Postby Sturm4299 » Sun May 19, 2002 3:53 pm

Currently I recieved a Spectra Mobile in the 900mhz. Unfortunatly it didn't come with a mic and such, but it does power up successfully and seems to work. Currently I have a HMN3596A and a HMN1056D mics lying around but are RJ45 based plugs. My first question would be is there a way to wire these for this mobile? From the decoding section on here its a 30w 900mhz Trunked Smartnet capable radio. I am unsure what A# it is, but from pictures it closely resembles the A7. If anyone has some information on the pin-outs for the mics and possibly a conversion to the Spectra's mic jack, that would be greatly appreciated.

My second question is until the programming cable and rib box arrive, currently I have the RSS for Spectra Mobile Radio, version is R06.00.05 . will this work fine in programming this unit?

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Postby EM-01 » Fri Apr 18, 2003 3:45 pm


Did you ever get the info on this you requested, I need it badly also.

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Postby RKG » Fri Apr 18, 2003 5:49 pm

The Spectra mike jack, viewed from the front of the control head, has 10 pins, numbered thus:

1 3 5 7 9

2 4 6 8 10

where pins 5 and 6 are slightly above the line of the others.

The pin assignments are listed thus:

4 SWB+
7 MIC Lo
8 MIC Hi

I BELIEVE that only pins 1, 3, 4, 6, 7 and 8 are used by the standard mike, but I cannot find a schematic for the mike.

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Postby techie » Fri Apr 18, 2003 6:09 pm

The only manual page I have is for a HMN1052A, which uses pins:

3 (BLU) (HUB)
6 (GRN) (PTT)
7 (BLK) (MIC LO)
8 (RED) (MIC HI)

the PTT switch (Normally Open) closes 5+6 (PTT/DIG GND), and
8 + mic (MIC HI).

MIC LO is tied to the ground bus within the mic.
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Postby Cowthief » Fri Apr 18, 2003 6:24 pm


The spectra mic's go on ebay for around $15 tops.

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