Could you identify this part?

[pav]

Hi all,

Could you help me to identify this part please?

I am attaching its pictures. It was placed inside the chassis of an optical microscope and I think it was never attached to any internal part of the microscope. The brown wires are connected to output ports of the microscope power supply.

As far I can see, there is a stamp that reads "HR 990" (or XR990?).

best wishes,

pav

 

[bertus]

Hello,

Is one side made of mica?
It could be some sort of heating element.
Is there resistance between the two wires connected?

Bertus

 

[pav]

Hello,

Is one side made of mica?
It could be some sort of heating element.
Is there resistance between the two wires connected?

Bertus

Hi Bertus,

Thank you for the prompt answer.

I have never come across mica before, I am not sure I can identify it. This material is not transparent, looks like aluminium. Smooth.

The resistance between wires (and ports of this part) is infinite.

best wishes,

pav

 

[bertus]

Hello,

Mica is often used as an heat resistant isolation material.
Strange that there is no resistance between any connection of the part.

Bertus

 

[73's de Edd]

Sir pav and that's heavy on the Sir . . . .
Amongst all of my worldly TDY's and sojourns . . . .
I'm thinking that I have seen that in a lab on a Leica microscope that had the wiring option of using two styles of halogen lamps.
Any chance that this units wiring is just bundled up and cable tied with another wiring set feeding the more modern lamp, but, also
with you having the option of using up old bulbs, if you had accumulated a stockpile of them.
The unit was either fired porcelain or ceramic . . . . can we see the . .finger blocked . . . . un- photographed side ?
What looks like aluminum on that side, I believe is being man made, compressed micalex sheet. And also confirm if there are not two small holes thru it that accept the paper clip gauge / size of a bi pin halogen lamps 2 pins. AND they connect to the mini pin sockets tied to the wiring.
Also OHM out that "alumi-ninny-yum-yum plate ", with meter probes to confirm that it is not being metal at all, but totally insulative quasi-silverish colored micalex.
REMEMBERING . . .
With my strong captive memory . . . . . check the surface and see if that pressure of forming the sheet didn't leave a mini-mini criss crossing of side by side vert and hoz interwoven lines like the pattern of screen wire used on a screen door, but, they are being condensed up to 1/10th that size and spacing.
Thaaaasssit . . . . . .

73's de Edd . . . . .

HONK ! ! ! . . . . . . . if you love Jesus. . . . . .
or
TEXT while driving . . . . . . . if you want to meet him.


.

 

[pav]

Dear Sir 73's de Edd,

You are correct.

Shame I did not see you message before. A local microscope specialist took a look at the component yesterday and he has also identified the component as the light bulb socket.

How did I manage to miss these two little holes...

The "alumi-ninny-yum-yum plate" is not conductive. So, you are correct again.

Many thanks, have a good weekend.

 

[roughshawd]

That's a heat proof terminal block.(probably)