[ICOM] Icom 706 MK IIG distortion

[George Lee]

Almost all of the 706's I hear on the air are in mobile installations.  If 
the engine is not running (stopped for transmitting) they will invariably 
FM.  That is a voltage problem. Don't think Icom has any plans to change as 
long as this radio has been on the market.

I have a 706MKIIG in my pickup and have not had the FMing problem because I 
never kill the engine when stopped for transmitting.  Never heard any 
problem with the tx audio.  No problem related to the remote cable.

This is my experience, yours may vary.

73, George

----- Original Message ----- 
From: "Ekki Plicht" <ep at plicht.de>
To: "ICOM Reflector" <icom at mailman.qth.net>
Sent: Sunday, January 23, 2005 9:18 AM
Subject: Re: [ICOM] Icom 706 MK IIG distortion


> On Sunday 23 January 2005 04:18, John King wrote:
> [...]
>> The rig in the Saturn has "fuzzy" audio on transmit. I
> [...]
>> Pickup truck. The digital readout would go in and out
>> when transmitting.
>
> I have seen these problems in a customer truck lately. The problem was:
> Remote cable too long (extended beyond what Icom sells), remote cable not
> properly terminated (small screw on main radio body missing), remote cable
> not blocked with ferrites.
>
> Further make sure that your radio get's a high enough voltage. The 706 
> (all
> kinds) show a distorted modulation when supplied with a voltage only 
> slightly
> below the nominal 13.8V. The tolerance (+- some percentage) in the manual 
> is
> simply not correct, the raiso fails much earleir on undervoltage. We tried
> this with several 706s in our club.
>
> 73,
> Ekki, DF4OR
>
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