I originally thought this is a relay. It had only 4 pins on it, boxed in a metal case and the label was completely erased.
I actually store it with all the old relays in the same box.
The pink markings here are the external pins that you could access.
This is a very old component probably from the 90's or even 80's.
You can see the metal case and it's completely erased label. The red-brown pieces in the right is the potted fragments. Everything was potted and encased. That red-brown material is actually rubber, very soft and it was not brittle, after all this time.
Inside, for my surprise, I find these 5 metal cases looking LIKE high-frequency oscillators . They clearly have a color code marked on them and probably some polarity along with it... Im guessing big time here. I know in the 80's and 90's I got some diverse components, and mostly transistors that were made in the soviet era, and all they had color markings like these things here. They didnt had a number like we are used today, they had a small blob of color paint on them. I am from Romania, by the way...
Im mentioning those old transistors because these 5 metalic components here are also having 3 legs each.
But the middle leg is cut for the 3 in the middle and only the side ones are used with the middle pin as an external contact pin.
All appear to be linked in series.
Very strange (for me). I never encounter such thing before.
Between 1 leg of each metal component and the external metal case, is connected a capacitor, probably in the order of pico F, I didnt measure them, but by the look of it. Also,all the metal cases (the 5 small ones) were soldered with a big blob of solder at their top.
Each metal case have no inscription on them, no number, no letter! Only that color marking and that's it.
My question to you is :
- What they are?
and
- How to test them?
If they are transistors, that is simple to test, I have 2 or 3 ways for that. But I doubt they are transistors because of that middle leg cut out for 3 of them in the middle. I higly suspect they are high-frequency piezo oscillators, but how I can determine their frequency? I didn't dealt too much into frequency area of the electronics. I have a couple of piezo oscillators and I know for sure they have 2 pins, because I used them as external oscilators for the old 16F84 PIC MCU some 10 or 20 years ago. And they were 16 or 20khz if I remember right.
There are no wrong answers here, a simple guess is fine for me.
Im curious if they can be re-used and also to find their original value.
Thank you.
I actually store it with all the old relays in the same box.
The pink markings here are the external pins that you could access.
This is a very old component probably from the 90's or even 80's.
You can see the metal case and it's completely erased label. The red-brown pieces in the right is the potted fragments. Everything was potted and encased. That red-brown material is actually rubber, very soft and it was not brittle, after all this time.
Inside, for my surprise, I find these 5 metal cases looking LIKE high-frequency oscillators . They clearly have a color code marked on them and probably some polarity along with it... Im guessing big time here. I know in the 80's and 90's I got some diverse components, and mostly transistors that were made in the soviet era, and all they had color markings like these things here. They didnt had a number like we are used today, they had a small blob of color paint on them. I am from Romania, by the way...
Im mentioning those old transistors because these 5 metalic components here are also having 3 legs each.
But the middle leg is cut for the 3 in the middle and only the side ones are used with the middle pin as an external contact pin.
All appear to be linked in series.
Very strange (for me). I never encounter such thing before.
Between 1 leg of each metal component and the external metal case, is connected a capacitor, probably in the order of pico F, I didnt measure them, but by the look of it. Also,all the metal cases (the 5 small ones) were soldered with a big blob of solder at their top.
Each metal case have no inscription on them, no number, no letter! Only that color marking and that's it.
My question to you is :
- What they are?
and
- How to test them?
If they are transistors, that is simple to test, I have 2 or 3 ways for that. But I doubt they are transistors because of that middle leg cut out for 3 of them in the middle. I higly suspect they are high-frequency piezo oscillators, but how I can determine their frequency? I didn't dealt too much into frequency area of the electronics. I have a couple of piezo oscillators and I know for sure they have 2 pins, because I used them as external oscilators for the old 16F84 PIC MCU some 10 or 20 years ago. And they were 16 or 20khz if I remember right.
There are no wrong answers here, a simple guess is fine for me.
Im curious if they can be re-used and also to find their original value.
Thank you.
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