[ICOM] ICOM IC-208H mic gain question

[George J. Nixon Jr.]

I've had two IC-208H microphones and I get reports of low mic gain.  I've tried the different settings referred to in the owner's manual, without much reported difference.  I've also opened the insulation behind the aperture in the mic itself.  Is there an internal pot adjustment, or part replacement that can be used for this purpose?   I'm also looking for about a 2 ft. coiled mic 8-conductor cable for the HM-133 on it also!
Thanks and 73 - George, N9EJS