[ICOM] (no subject)

[Gary P. Fiber]

Jeff,

The problem usually is the current shunt has cracked solder joints 
within the 765 internal power supply if the 765 works ok at low power 
but fails under full power
Reading your message again I see it must be ok when using an external 
power supply.
Do you get 100 watts out on RTTY when using the external power supply?

Repair of the current shunt solder joints is not hard, just get your 
electric screw driver warmed up. A nice 25 watt soldering iron, some 
decent size of solder wick or a desoldering tool, maybe some liquid 
solder flux. I can write up a basic procedure if you need me to.
You will likely find that doing a google search too. This looks to be 
nicely done http://www.k4ro.net/tcg/misc/Icom-765-1.02.pdf
Look up repair of an Icom PS-35 power supply its the same supply within 
the IC-765 except for the case has more cooling fins on the 765 supply.

Gary K8IZ


kd4lyh wrote:
> Good Day,
>  My Icom 765 has several issues but I would like to work on one at a time
> and post to the list if I correct the problem,
>
>   When xmitting in rtty and I turn up the rf power the display starts to dim
> and the Vcc drops. I have hooked up an external ps and measured to see if I
> was getting the same voltage drop and im not stays at 13.8 so something in
> the radio. Im open to suggestions as what to check or repace. Perhaps
> voltage regulators?
>
>
> Regards Jeff kd4lyh
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