[ICOM] SM-6 and IC-756 PRO III

[Gary Fiber]

Don't confuse the SM-5 with the SM-6. The SM-5 was designed for the 
720, 730, 740 Series and had tons of mic gain especially if connected 
to a newer rig like the 756PROIII.. The SM-6 will work with the 745 
up to the current models like the IC-756PROIII with no adverse 
effects. Yes the SM-6 does have a gain adjustment but it sports no 
where near the gain the SM-5 had. The SM-6 will not properly drive 
the old Icoms, 720, 730, 740 series that had needed the higher mic 
amplifier gain.

Where the SM-5 will overdrive the newer Icoms. Though I have in the 
past specified one of those of the person spoke very softly. Had a 
guy years ago with an IC-725 who spoke just above a whisper, had him 
purchase an HM-7 and heard back from him about glowing audio reports. 
Now my voice on an IC-725 and HM-7, well I could not crank down the 
mic gain low enough.

Gary K8IZ

At 07:29 AM 8/5/2008, you wrote:

>Cam: The SM-6 microphone will work with the 756-Pro radios, but 
>remember that it was designed for the older Icom radios with lower 
>microphone amplifier gain. This is why the SM-6 contains internal 
>amplifiers. If I had an SM-6 and wished to use it with my Pro-III 
>radio, I would install a Radio Shack 270-090 PC mount electret 
>element in the SM-6, and wire it directly to mike pins 1 & 7, while 
>utilizing the existing ptt wiring at a total cost of about $3 USD. 
>This would allow me to utilize the wonderful microphone equalization 
>built into the Pro.
>----
>Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>Icom Users Net: Sundays, 1700Z, 14.316 MHz
>Icom FAQ: http://www.qsl.net/icom/

Gary Fiber K8IZ
GROL PG-19-6691
Washington State Resident