Motorola 365 Transistor

It sounds like a house number. Somebody ordered a few million or so, marked with their proprietary house number, and either the product died or the company went belly-up, ergo, millions of overstock.

I'd guess it's either a 2N2222/3904/4401 sub, or some exotic thing. Can you get one and run its curves, etc?

Good Luck! Rich

Rich Grise Inscribed thus:

Hi Rich, Thanks for your suggestions. At the moment I don't have access to the test gear to be able to do that. This transistor, there is about a 100 of them, is part of a very large consignment of semiconductors that I acquired as part of an auction lot a few years ago. I'm only now getting round to examining them. There are several hundred VN46A power fets as well as things like PUT's & UJT's in there. It would be nice to know what these devices are.

I really must make an effort to photograph those "Ferranti" IC's.

All you need is a multimeter. That's enough to know if it's NPN, PNP, something else, silicon or germanium.

Knowing those things plus the case style info you already have will ease your search enormously.

-- Cheers, James Arthur

James Arthur wrote

Hfe can be measured with a VOM (Multimeter). Can leakage current be measured with a Multimeter also?

Stashes of parts like that are commonly off spec rejects, too.

Then again, the venerable and historic CK 722's were actually off spec parts reclassified to fit their specs.

I inherited some of the blue ones when I was 10.

Back when there still was a hobby parts market, off spec transistors, SCR's etc flooded the market.

It's easier to measure V(be). That tells you Si or Ge.

-- Cheers, James Arthur

snipped-for-privacy@yahoo.com Inscribed thus:

OK ! Got the AVO out... Silicon PNP EBC pinout. I still don't know if its LF, RF etc. Yes I can measure the Hfe but I haven't tried... Yet ! I suppose I ought to start and catalogue them...

That's a good start.

An old set of Motorola's dark-green Semiconductor Databooks would tell you every transistor they ever made around that time, . I bet it's not that many.

-- Cheers, James Arthur

Measuring inverse beta will tell you if it's gold-doped (high speed switcher) Measuring saturation voltage at moderate current levels will give a clue as to device area. Checking breakdown voltage too...

-f

Sure, and a variable power supply and series resistor. But you've got to have a pretty sensitive current range - leakage is probably in the microamp or less range.

Good Luck! Rich