Identify this tranny?

[armdnrdy]

I purchased a small "grab bag" of electronic components to get my hands on a couple of dual (4 lead) photoresistors to experiment with...
With the photo cells and other goodies came a few transistors which I can't identify.
I get zero hits while punching in the numbers printed on them...
I'm sure that one of the many transistor aficionados will recognize this model.

I read B-10910 with 6635Q written below on one
and B-10910 with 6634Q written below on the other one.

https://www.dropbox.com/s/4hvxe480fy73m9y/trans1.JPG?dl=0

https://www.dropbox.com/s/81nmh8lyu6rhewk/trans2.JPG?dl=0

https://www.dropbox.com/s/exi1ndukk67cjqs/trans3.JPG?dl=0

[thermionix]

He'll always be Bruce to me.




Okay, sorry, I'll take a WAG that 6634 and 6635 are date codes.  34th and 35th week of 1966.  10910 could be some manufacturer's in-house number, and it may be real damn difficult to figure out what it corresponds to.  Maybe Steve Bear has come across these before.  The "B-" might refer to the manufacturer of the transistors, seeing that they have a B logo on them.  I don't recognize the logo myself.

[PRR]

> recognize the logo

Bendix.

http://www.bendixradiofoundation.com/hist_logo.htm

http://www.radiomuseum.org/r/bendix_626.html
http://www.radiomuseum.org/r/bendix_radio_telephone_skipper_101.html

[armdnrdy]

Thanks for that Paul.

I still haven't found any additional info on these numbers but...with you help...I found a transistor with the same Bendix logo.

https://www.dropbox.com/s/q25touj9fbunxwl/bendix%201039.jpg?dl=0

[samhay]

Do you need to know anything a semiconductor analyser won't tell you (and do you have, or have access, to an analyser like a Peak Atlas)?

[armdnrdy]

Do you need to know anything a semiconductor analyser won't tell you (and do you have, or have access, to an analyser like a Peak Atlas)?

No....no Peak Atlas.
I have a atmega328 component tester which tells me these trannys are PNP with an HFE of 100 & 84 for the two.

Since I can't find any documentation on the numbers...I'll have to test them to see if they are silicon or germanium...and if they are useful for any projects.

[TejfolvonDanone]

If you have a DMM you can test them to see if they are germanium or silicon. With the diode tester measure from base to emitter. If the forward drop is around 0.2V than they are germanium.

[anotherjim]

And the slightly higher reading diode is the base-emitter.

[armdnrdy]

If you have a DMM you can test them to see if they are germanium or silicon. With the diode tester measure from base to emitter. If the forward drop is around 0.2V than they are germanium.

.192...and .197

Germanium they are.
Now...once I test these things for HFE and leakage...will I be lucky enough that two out of two are useable for a decent sounding fuzz?