OC50/51 point contact germanium transistors

I'll have to look in my junk box !

Graham

I still have the old, original Philips manual somewhere.

Google!

Bill

-- Fermez le Bush--about two years to go.

The problem with searching is that a short name like "OC50" comes up in many, many places - to do with everything from Zulu warriors to European ovens! And so many chemistry experiments (something to do with Observed Concentrations). Even putting in an extra word, like germanium, doesn't get me very far - some histories, Mr Transistor and others (including Andrew Wylie in this newsgroup back in '96) also looking for them, and (you might guess...) those chemical experiments again.

But I can find enough references to slightly more modern transistors, like the AC128; quite often these are via "parts finder" services that require something like US$500 of each part, and for all I know they all point to the same place. Oh, and I have to join first. Still, there are a few places like AMS with stock of the later germanium transistors like AC126, AC128 etc but even these are expensive or scarce.

The hard bit is finding *any* OC50 or OC51 point-contact transistors for sale (and I'm not even sure any working ones exist any more).

Mark A.

Why fret over an OC50 ?

Btw, you should learn to use the right search terms in Google !

Graham

Ah but if you add the word "transistor" to the mix you get only four links. Interestingly also is the old argument about whether it is OC or 0C and if you change to the zero start letter in Google, then you still get one link.

Peter Dettmann