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

Mon, 29 Apr 2002 10:30:01 -0700

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�C case
temperature in an RF power device...."

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.

Best 73,
Adam, VA7OJ/AB4OJ
North Vancouver, BC, Canada
http://www.qsl.net/ab4oj/
Note new e-mail address:
mailto:[email protected]

-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of Geo Clute W7LFD
Sent: Monday, April 29, 2002 09:39
To: [email protected]
Subject: RE: [Icom] IC-756Pro Heat Issues & Fan Servicing Information

Adam, I was thinking more about the other components, cabling, connectors...etc.
Heat is the enemy.  I suppose I just feel better keeping the case temp at room
temperature.

Geo W7LFD

Behalf Of Adam Farson
Sent: Sunday, April 28, 2002 4:14 PM
To: [email protected]
Subject: RE: [Icom] IC-756Pro Heat Issues & Fan Servicing Information

George,

Not to worry! The thermistor is attached to Q5, one of the PA power devices.
70�C case temperature in an RF power device is hot, but not dangerous.

(In the matter of SI vs. Imperial measure, Napoleon won my war way back in
1955.)