[bars] Icom IC-735

[Eric A. Cottrell]

Hello,

Those type of problems usually point to an internal power regulator used 
to drop the incoming DC supply to a lower voltage. The finals are almost 
always directly powered for the DC supply coming in. Most of the analog 
circuits will use +8 volts with +5 volts being used for the digital 
circuits. There is a pin on the mike connector that has +8V on it that 
you can check with a voltmeter.

I would try other bands to see if it is just 20 meters. If you meant 
that there is background static except when the radio goes "dead", then 
that also points to an internal power regulator problem.

73 Eric

On 03-Jul-22 4:41 AM, Jason M. Sanroma - K1NAD wrote:
> Hello,
>
> I have an Icom IC-735. It was given to me by my grandfathers friend 
> who happened to be the original owner of the radio. I noticed that 
> after about 40 minutes of TX/RX 20m goes “dead”. The meter is 0 and 
> does not move when I TX or just RX. It turns back on after about 20-40 
> minutes. There is also no background static while on RX.
>
> It is obviously heat sensitive but I am not sure why and what 
> is causing it. Does anyone have the same issue? Can anyone help me 
> with an explanation of what it could possibly be?
>
> Thanks for your help.
>
> 73,
> Jason
> K1NAD
>
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