old transistor data

[sakis]

since we have some oldtimers in the forum i dare to post this pictures from recently salvaged transistors from a police stock house ....

interenet seems unable to provide information about that so any one knows about it is very welcome

thanks sakis

[Mooly]

R0G02 Triac ?

[sakis]

down under there is huge marks E and B probably base and emmiter .... diode test from a multimeter doesnt measure like a triac but something like a npn but with other readings

[Mooly]

Googled R0G02 and it comes up as obsolete Triac.
Try it and see.
Used to see a lot of odd parts years ago. Could the other one be a regulator perhaps.

[Mooly]

Add to that, it was in things like TV chassis's that these odd numbers cropped up, you could never find the parts listed generally. Some TV's used Triac line output stages in a commutating type arrangement -- horendous things looking back.

[sakis]

i am with you but this do not justify the existance of tv triac in a police stock room

most items that i had from there in the past where RF related

so these could be parts of power supply related items ?

[Mooly]

I know what I would do. Current limited PSU, connect it up, see what it does. Use a 1 k or something to dab the base and see what happens, does it conduct, does it latch.
Or non of the above
Same for the other. If your not sure if it's a reg bring the voltage up slowly and monitor the third "connection" and see if it levels off. Just keep trying every which way about.

[Mooly]

Maybe it was a secret workshop, not a Police house.

[jacco vermeulen]

Transistor, not a triac.
Try a search for R-Zero-G-Zero-2.
There's also R0G03, R0G04, R0G05, etc, not all TO-3 package types, these semis are from the twilight zone period.

[unclejed613]

welcome to the wonderful world of OEM "house label" parts. you might (usually about a 50/50 chance) find a NTE or SK cross reference for it (a better chance is if you find an ECG or SK book from about 5 or 10 years after the date code on the device). there is a "shelf life" for cross referenced devices. there are many devices you can't find listings for anymore because they're obsolete for too long and are discontinued from even the cross references.

motorola did OEM parts for a lot of equipment manufacturers. usually they are a standard MOT part that has been given a "house number". MOT charges a few cents extra per device for relabeling parts like this, more if they do any selection for beta or other matching to a specification. RCA used to make oem parts too, often for their competitors in the TV market.... (think about that one for a minute...... )