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

Then they were likely to be 2n173 40W TO3 NPN

?-)