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icom730 question

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ddbddg1

Senior Member
Dec 18, 2011
114
5
28
sheridan wyoming
Just bought a used icom 730 and it came with no mic.
I am having a hard time finding a mic.
I have a turner +3b desk mic.and also a turner jm+3 power hand mic.
I was wondering if I could wire either of these to work?
If not what would be a affordable hand mic. that would work?
any help would be greatly appreciated
 

Ebay mic. is sold already. and so far I cant find any info on how to wire the turners to the radio or any info on how to mod the mic.
I think I may have wasted my money on this radio
 
I don't think your going to like the way the +3 or any other "CB" mic will work on that radio. Those rigs don't play well with low z mikes. I tried to hook up a 1104c to my ICOM 720A back in the day and it never sounded good at all. You would be much better off getting an ICOM desk or hand mike or the ones pointed out by M42.
 
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w9cll said:
I don't think your going to like the way the +3 or any other "CB" mic will work on that radio. Those rigs don't play well with low z mikes. I tried to hook up a 1104c to my ICOM 720A back in the day and it never sounded good at all. You would be much better off getting an ICOM desk or hand mike or the ones pointed out by M42.
Click to expand...


The mic input impedance of the IC-730 is 1300 ohms according to the manual. Not really a high impedance input. The impedance of the Turner +3 is 5000 ohms, not that bad a mismatch. The Astatic 1104c has an impedance of about 5000 ohms and likes to see a load of at least 1000 ohms. The Turner +3 should match up quite well with the IC-730. It did on my IC-735 when I had it but I preferred the HM-12 hand mic for convenience.
 
Not necessarily. Voice characteristics along with mic freq response as well as freq roll off due to any impedance mismatch all factor into what it sounds like. Different voices are suited better to different mics.
 
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