I've had 2 mc-60a's, first one I have no clue when the problem started but 
as soon as I got my 570, I had the RFI issue, got another one with my 
TS-2000, was fine for a little while then one day I noticed it doing it, mid 
NTS net. I found the connector was loose on both then that happened and 
there wasn't much I could do but they both looked cracked to me, I don't 
know if they're supposed to be that way but I swore the second one wasn't 
like that when I got it. I dunno, I'm back to the MC-80 right now or the 
audio technica mic with the w2ihy box, mc-60a will probably be sold. I think 
it's absolutely asinine to have to run a wire from the base of the mic to 
the radio, especially when the mic costs what it does. Some radios don't 
seem to have that problem, but it was so bad on my TS-2000 I thought I broke 
the radio good when I turned on the monitor and heard it. If I didn't pay so 
much for the mic, I'd take a hammer to it I'll tell you, I'm done with 
MC-60a's.
----- Original Message ----- 
From: "Michael Ryan" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, September 03, 2009 3:05 PM
Subject: MC-60A RFI Prevention


> Hi all:
>
> As the MC-60A Desk Mic from Kenwood is an excilent mic, it does have a
> tendency to create RFI, depending on the mic, old or new. (HI)
> Well, mine is no different. There is a mod that can be done to remove
> this RFI problem. Anyone have any ideas?  It has something to do with
> the grounding in the connector, maybe even adding a wire or something.
> I'm thinking of sending it along with my 940 to be repared. Where the
> jumper cable connects from the base to the mic it self, the the jacket
> is pretty cracked up and where the connecter connects to the rig it
> self, I can feel the connecter on the cable be a tiny bit lose, probly
> needs to be titened up.
> These small damages could be the cause of some of my RFI but I would
> like to know what that mod is to aliminate it all together.
> On my 940 for a moment, as I'm not hearing any audio through my
> headset when the monitor is turned on, is there a monitor vol control?
> Maybe I turned it down accidently, thinking it was another function.
> I did play around with the speech compressor controls and maybe one of
> those controls is the monitor vol.
>
> TNX & 73:
>
> Michael De VO1RYN