On Fri, 12 Dec 2008 20:36:58 +0100, Antonio Vernucci wrote:

The Hallicrafters SR-500 utilizes a pair of Tung-sol 8236s.

The 8236 seems to be identical to the 6DQ5, except for plate dissipation
(50W against 25W) thanks to the use of a carbon plate.

The 8236 seems to be available nowhere.

Any suggestion where to find them?

73

Tony I0JX

You didn't look far. http://www.tubesandmore.com/ has them. Granted,
it's over $80/ea, but "way expensive" is different from "not there".

(I wish I got a kickback from those folks, I really do).

--
Tim Wescott
Control systems and communications consulting
http://www.wescottdesign.com

Need to learn how to apply control theory in your embedded system?
"Applied Control Theory for Embedded Systems" by Tim Wescott
Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html