Jim Thompson wrote:

On Tue, 08 Aug 2006 14:48:15 -0700, Tim Wescott
wrote:


Jim Thompson wrote:

On Tue, 08 Aug 2006 21:19:21 GMT, "ian field"
wrote:



"Jim Thompson" wrote in
message ...


On Tue, 8 Aug 2006 13:44:27 -0700, "RST Engineering \(jw\)"
wrote:



What primitive semiconductors did you use in the output stage, or was it a
toob device? Did we have 2N3055s in '75? I don't memember.

Jim


[snip]

I'm trying to remember what semiconductors I used. But, IIRC,
2N3055's *were* available around that time.

...Jim Thompson


Was it Ge or Si ?



It was Silicon. I didn't use any Germanium power devices since I
boosted my car radio back when I was a junior in high school.

...Jim Thompson

Correction: it _is_ silicon.
http://www.onsemi.com/pub/Collateral/2N3055-D.PDF.

Digi-Key has them for $2.10 a pop, in the TO-3 case, no less.


I said it was silicon. The Ge device I used in HS was a Delco
doorknob power device. I did 10W class-A ;-)

...Jim Thompson

I was only taking issue with your tense -- the 2N3055, while venerable,
appears to be in current production. So it's an 'is' part, not a 'was'
part.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

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