"flipper" schreef in bericht
...
On Sat, 27 Nov 2010 22:33:41 +0000, Baron
wrote:

flipper Inscribed thus:

On Sat, 27 Nov 2010 16:06:17 -0000, "Ian Field"
wrote:


"flipper" wrote in message
m...
On Fri, 26 Nov 2010 16:07:10 -0600, John Fields
wrote:

On Fri, 26 Nov 2010 13:04:24 -0800, "Artemus"
wrote:


"flipper" wrote in message
news:hv20f65tahl597f69q7v3dg8o88fvrt8bd@4ax .com...

Comes from never throwing anything away. I've still got my 1985
Signetics Linear LSI Data and Applications manual (because it had
so many app notes).


I have the same affliction. I still have apps & data books going
back to my 1973 National Linear Apps Handbook.
Art

---
How about this beauty?: (needs a new spine...)

---
JF

That beats my 1964 G.E. Transistor manual.


I'd be very interested if anyone has any old Mullard data sheets; OC,
AC, AF etc.


Sorry, don't have any Mullard.

Does ring a bell though. Back when I was a young whipper snapper I
might have used one of the OC line in a 'talking on a light beam'
science fair project but all I can remember is the 'cost saving trick'
was to scrape black paint off the transistor body so it could be used
as a photo transistor. Sounds like maybe an OC7 (or 71, 75, etc).

There were various paint coated transistors in the old days that could
have the coating removed so they could be used as light sensitive
devices. I also remember filing the top off some metal can ones
because someone said in a construction project that this one or that
was more sensitive to light.

It was so long ago I can't possibly remember but it was glass
encapsulated and I seem to recall the article I was using mentioned
the 'same thing' sans paint was sold as a photo transistor, and I
think that's true of the OC line.


I remember the OC13, OC14, OC44 and OC45. Black painted glass encapsulated
germanium transistors from Philips that could be used as a light dependend
semiconductor device in a boys secret transceiver project. Some years later
I heard a story at TU Delft about some calculation device - a kind of
predecessor of a transistorised computer - that tend to stop for a coffee
break. It took quite some time to find out that at about coffee break time
the sunshine reached the device and switched on a transistor that had lost a
part of its black paint.

petrus bitbyter