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Author Topic: icom rj45 to 8 pin conversion for Icom SM5 mic  (Read 1790 times)
VK2AET
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Posts: 42




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« on: January 06, 2010, 11:29:40 PM »

Hi Everyone,

I was wondering if someone would be so kind as to tell me the pin matching I would need to do to get my SM5 desk mike working with an Icom 7000 which uses an rj45.

I note that the SM5 seems to require 9 volts while to IC7000 provides 8 volts.  I can supply both diagrams if you need them but they are easy to get on the web.

Further to this do you need to have any shielding for the cable of can I just cut one end of a cat 5 cable and solder to an 8 pin mic plug.

Any comments greatly appreciated.

Thanks
Scott
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WA3SKN
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Posts: 5559




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« Reply #1 on: January 07, 2010, 09:07:34 AM »

Not only will you need to change jacks, there is also output level an impedance differences.
Thats why Icom recommends their SM-20 for the Icom 7000.
So, it can be done, but you will need to build a converter box of some type to hold the extras required to make this work.

-Mike.
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KA2UUP
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Posts: 388




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« Reply #2 on: January 07, 2010, 10:47:02 AM »

This is what you need:

http://www.mfjenterprises.com/Product.php?productid=MFJ-1251

It will convert round 8-pin connector to RJ-45 and vice versa.

Cheers!

Bert @ KA2UUP
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KC5JK
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Posts: 98


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« Reply #3 on: January 23, 2010, 05:26:00 AM »

There is also the Icom OPC589 adapter, which has RJ45 one end and 8P-round the other.  Note:  The Heil adapter to mate his proprietary aftermarket mic to an Icom is not wired the same as the OPC589.
I don't think the one volt difference is going to matter for the cartridge, assuming it's an ECM.
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