[ICOM] Mic gain on the 706 MKIIG

Wed May 31 13:47:06 EDT 2006

Far be iut from me to dispute Cliff's well known
knowledge and experience, BUT:

If deviation is set at 5 kHz (or whatever is desired)
adjustment downward of the mic gain will not cause
any change in the deviation until that mic gain is
dropped to the point where limiting is NO LONGER
occurring.

This is a similar condition to that which was common
in years past regarding use of packet TNCs with 2m and
other FM transceivers.  To get the best data transfer
one needed to have maximum deviation of the rig
set to 5 kHz (or just a slight bit lower) for voice use
and then set the TNC output to give 3.5 kHz peak
deviation with both tones running.  The same basic
criterion holds true for setting DTMF mic tones.

Distortion  MUST  be avoided to ensure proper
detection of the tones.

73 - Mac, K2GKK/5
Oklahoma City, OK

----Original Message Follows----
From: "Clif Holland" <radio.service at verizon.net>
Reply-To: ICOM Reflector <icom at mailman.qth.net>
To: "ICOM Reflector" <icom at mailman.qth.net>
Subject: Re: [ICOM] Mic gain on the 706 MKIIG
Date: Wed, 31 May 2006 12:19:52 -0500

I would,

1. Check the current deviation as specified in the SM
2. Adjust to spec.

If still too hot due to voice characteristics then adjust down.

I will check distortion on a 1KHz tone as I change the mike gain and see 
what happens. The deviation didn't change.

Clif Holland KA5IPF
www.avvid.com

----- Original Message ----- From: "John Luthy" <jluthy at worldnet.att.net>
To: "ICOM Reflector" <icom at mailman.qth.net>
Sent: Wednesday, May 31, 2006 11:23 AM
Subject: Re: [ICOM] Mic gain on the 706 MKIIG

>Clif,
>
>I highly value your input and your knowledge.
>
>It seems to me, on my radio that the mic gain has a huge effect on FM
>audio quality.
>
>Would you suggest that I set my gain for normal SSB operation and then
>set the FM dev.  ?  I have a friend  (just one )  who has a service
>monitor so betwen the two of us we should'nt do too much damage.
>
>Also I have been told that my audio is way bad on AM unless I set the
>mic gain way down.. around a setting of 2 or 3.  the same setting I
>use on FM.
>
>Or should I keep my big fat fingers out of the radio and just change
>the gain setting when I change modes?
>
>Thanks
>
>N7JL
>John
>
>----- Original Message ----- From: "Clif Holland" 
><radio.service at verizon.net>
>To: "ICOM Reflector" <icom at mailman.qth.net>
>Sent: Wednesday, May 31, 2006 8:24 AM
>Subject: Re: [ICOM] Mic gain on the 706 MKIIG
>
>
>>The mike gain setting has nothing to do with FM deviation. Deviation
>is set
>>by an internal pot. The front panel Mike Gain setting is for SSB.
>>
>>Clif Holland KA5IPF
>>www.avvid.com
>>
>>
>>----- Original Message ----- From: "John Luthy" <jluthy at worldnet.att.net>
>>To: "ICOM Reflector" <icom at mailman.qth.net>
>>Sent: Wednesday, May 31, 2006 9:18 AM
>>Subject: Re: [ICOM] Mic gain on the 706 MKIIG
>>
>>
>> > Jack
>> >
>> > I also have this issue with my 706.   I think I have my gain set
>to 3
>> > and I yell at it on SSB and hold the mic about a foot away on FM.
>> >
>> > There must be some way to set things so this dosent happen.  What
>> > makes it worse is My kenwood d700. I always have to yell at that
>thing
>> > so I find my self over driving my 706 on FM.  just 'cause I'm
>trained
>> > to.
>> >
>> > N7JL
>> > John
>> >
>> >
>> > ----- Original Message ----- > From: "Jack - K4WSB" <K4WSB at arrl.net>
>> > To: "ICOM Reflector" <icom at mailman.qth.net>
>> > Sent: Wednesday, May 31, 2006 3:52 AM
>> > Subject: [ICOM] Mic gain on the 706 MKIIG
>> >
>> >
>> >> Am I missing something?  Every time I switch between FM & SSB I
>have
>> > to
>> >> reset the mic gain.  I understand this is also a problem with the
>> > 910h also.
>> >> This is most inconvenient, especially mobile.
>> >>
>> >> Is there a fix?
>> >>
>> >> Does the 7000 have the same problem?
>> >>
>> >>
>> >> Jack Hartley
>> >> K4WSB
>> >> ARRL - QCWA - OOTC
>> >> DXCC Honor Roll
>> >>
>> >> ----
>> >> 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/
>> >
>> > ----
>> > 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/
>> >
>>
>>
>>----
>>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/
>
>----
>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/
>

----
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/