[ICOM] 781 problem Mic gain gos away

[gfiber at comcast.net]

It almost sounds like a bad electrolytic cap and when you power off the radio and back on it reforms. You might check if the mic bias is there when the gain goes low. I would open the mic connector on the emd of the mic cord and stab the voltage there so its loaded. I can't remember hearing of this issue during my time at Icom.

Gary K8IZ
 -------------- Original message ----------------------
From: KG4LRU at aol.com
> Has anyone run across on the 781 Mic gain just go's away, if you turn  it up 
> its starts driving again after few minutes it returns to normal, and you  have 
> too turn the gain down again.
> It comes and go's I have checked unit with other mic and this one has been  
> in for a complete  service .In the last two years. I have run across one  other 
> friend that his 781 exhibits the same symptoms. Also Turning the radio OFF  
> and back on seems to cure the problem for awhile. Any Ideas Icom service 
> doesn't  have a clue?
>  
> 73
> Phil AI4DQ
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