[ICOM] Icom 781 heat problem

[Tim Duffy K3LR]

Hello Sam!

A fan on the rear of the 781 will not help power supply heat problems. It will only help the tremendous heat problem of the power amplifier section. Power supply heat problems can
be helped by removing the internal speaker and mounting a fan there.

You are taking on a noble project by drilling the rear chassis, but the Sherwood fan mod is so slick and easy to do, I would highly recommend it over drilling things yourself. I
am using the Sherwood fan kit on all of my 781s. The temperature reduction with the fan during a 48 hour contest is phenomenal!  It looks very Icom stock and does increase the
resale value of the radio.

73!
Tim K3LR

Sam Effinger wrote:

> I have my IC-781 apart and want to punch some holes in the rear panel to  mount a fan to help cool the power supply..
>
> has anyone got any tips on doing this ???
>
> any ideas on the location and how many holes to punch and what type of fan to mount ???
>
> I could buy the Sherwood mod. buy decided to do it myself...
>
> Also I  am one of the guys who used to make the Ekletech remote tuning knob for the IC-781 and  other radios...If you have any problems let me know..I still have spare parts..
>
> This is a great place for Icom help...
>
> Life is good...
>
> Thanks for any help..
>
> Sam  K9SD
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