[Icom] IC-756Pro Heat Issues & Fan Servicing Information

[Geo Clute W7LFD]

>Behalf Of Adam Farson
>Sent: Monday, April 29, 2002 10:30 AM
>To: icom@mailman.qth.net
>Subject: RE: [Icom] IC-756Pro Heat Issues & Fan Servicing Information


>Hi George,

>The case temperature I referred to was the power-transistor case =
temperature,
>not the radio case temperature. I stated that clearly in the phrase =
"70=BAC case
>temperature in an RF power device...."

Yes, I understood that and I convoluted the radio case issue.  The outer =
chassis was my intent with keeping the "case temperature"  at room =
temperature.

>In practice, the radio will not overheat if its air vents are =
unobstructed, and
>it has adequate airflow on all sides. If the radio is mounted in an =
enclosed
>console, the console must be fitted with adequate air circulation fans.

In the receive mode for a few hours at a time the console/chassis =
temperature at the rear left seems to be warm.  I'm not blowing air into =
our out of any of the vents and am just circulating air on the rear, =
bottom, and left panel of the chassis.  Two .095 A 12 volt fans are =
bound together accomplishing the circulation.  After running these fans =
the chassis temperature  is cool to the touch. Voila no more baking.

I know that if the circuit operates as stated in your service manual =
that overheating, which is a very nebulous term, will not occur, however =
I still don't like the heat.

George W7LFD