BIP 26x-x 047? and glass diodes that aren't diodes? What are these old parts?

[dentaku]

I was cleaning one of those plastic cabinets of little drawers I got along with a bunch of stuff I bought from the collection of an old man why died recently and found these two little glass "things" with what looks like copper leads.
They're not diodes according to my multimeter but I have no clue what they are.


Also, I found these mixed in with a bunch of 74xx stuff and SIL40xx stuff.
They're all BIP 261x-x 047 and it looks like one is 027.
I can't find what they are.

[Stonent]

Well, what does your multimeter say?

If they're less than an ohm, probably a fuse. More than a ohm, probably a resistor.

The chips are decade counters for driving Nixie Tubes.

http://www.wps.com/archives/tube-datasheets/Datasheets/Burroughs-1061K/10.JPG

[c4757p]

Bidirectional TVS diodes?

[Paul Price]

Charge one or  more large value capacitors from  AC line voltage to peak DC voltage. Remove charged caps and put them in series and connect to a 10K resistor to the "diode" DUT with your scope attached in parallel via a DIY aprox. 10/1 attenuator (i.e. 100k/10K) to a 10x scope probe input on 5V to 10/div DC range. You will see the what this device is, probably a fixed protective breakdown voltage didoe, then switch capacitor polarity and repeat measurement.

[c4757p]

Charge one or  more large value capacitors using a diode from  AC line voltage to peak DC voltage.

FTFY

Yes, it should be obvious, but you shouldn't assume it won't get missed in a moment of cerebral flatulence.

[free_electron]

Those glass things are Diacs. they are a bidirectional avalanche diode that triggers at about 40 volts. used to ignite Thyristors (SCR's) and Triacs.

[dentaku]

OK, that explains why the diode test on my multimeter reads .OL both ways.
 

Those glass things are Diacs. they are a bidirectional avalanche diode that triggers at about 40 volts. used to ignite Thyristors (SCR's) and Triacs.

[dentaku]

The chips are decade counters for driving Nixie Tubes.

http://www.wps.com/archives/tube-datasheets/Datasheets/Burroughs-1061K/10.JPG

Wow, that's some old stuff I DID find a NIXIE tube mixed in with all the other stuff too so it's logical that I also have the drivers for them. I also have some of those old LEDs with the round bubble like lenses over them.

[Stonent]

I find it interesting the haphazard way they stamped the chips. Nothing is lined up.

[dentaku]

I'm lucky some of them weren't missing half of the text considering how misaligned it is.

 

I find it interesting the haphazard way they stamped the chips. Nothing is lined up.