On Sun, 12 Feb 2012 13:20:03 -0500, "Michael A. Terrell"
wrote:


Baron wrote:

Artemus Inscribed thus:

?
? ? wrote in message
? ...
?? Does anyone have any data on this vintage power transistor ?
?
? Possibly Delco's version of the 2N3055 which was ubiquitous
? in the '70's.
? Art

Yes that is what I'd have gone for...


Or the Delco DS503 Germanium output transistor they used in their car
radios. Delco was still mostly Germanium in the '70s.

http://www.nteinc.com/specs/100to199/pdf/nte121.pdf

As a teenager I used a DS501 running class-A, with a big-ass choke,
direct driving the speaker. Custom made heatsink courtesy of my
father-in-law to be (a machine shop operator ;-)

...Jim Thompson
--
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I love to cook with wine. Sometimes I even put it in the food.