old transistors photo

[terry michaels]

>Toby Paddock wrote:

> In cleaning up the garage (the...  horror), I ran across some old
> transistors.
> I got them in the late 60's I think from someone who got them from
> someone who got them from someplace.
> Anyway, here is a picture if anyone is interested:
>
> http://www.seanet.com/~tpaddock/images/old_trans_m.jpg   80K
> http://www.seanet.com/~tpaddock/images/old_trans_l.jpg   267K
>
> I'm guessing mostly germanium by the age and a quick
> ohmmeter check. Some may be newer parts, there is some
> obviously newer stuff in the same box.
>
> Also, I noticed that the leads of most of them are ferrous.
> They stick to my tweezers that somehow got magnetized.
>
> What would a distortion box using selenium rectifiers sound like?
> I think there may be some of those still hiding around here. :)
>
>  - -- -  Toby Paddock<

Hi Toby:

The two  rectangular black transistors with the clear plastic base in the
upper right corner of the photo appear to be the Raytheon CK722.  That was
the first transistor intended for the hobbyist market, and was popular in
the early '50s.  A detailed history of this device is available at:

http://www.geocities.com/ResearchTriangle/Campus/4724/index.html

BTW, I sold a CK722 on Ebay for $40.00 last year, a good example of a
"collectible" type item.

Terry Michaels