On 24 Sep 2006 08:53:06 -0700, "Telstar Electronics"
wrote:

I came across this site... and picture. Are these diodes an attempt at
thermal tracking for the bias?
http://www.worldwidedx.com/gallery/a...pad_and_diodes

www.telstar-electronics.com

It provides negative thermal feedback.

The voltage across the transistor will decrease as the transistor
temperature increases. This prevents thermal runaway.