Please help me identify these .45 3kv TRW caps

[kstlfido]

Hi folks-

I came across a cigar box of these TRW .45uF 3kv (!!) caps recently.

They are metal cylindrical with axial leads. 2 5/8" (66mm) long; 11/16" (18mm) diameter.

Hermetically sealed ends. Gold plated leads. The type on the caps reads:

2760307-2
TRW 957
LMSC-35-1
.45 +- 10%
3000 VDC

 

[kstlfido]

Could anyone here shed some light on what these caps are, particularly the dielectric? Any help would be greatly appreciated.

Thank you- Kent

 

[TheGimp]

Cut one open and dissect it.

Just wear gloves in case it is oil filled, could be PCBs.

What do they measure? .45uF?

 

[tomtt]

Cut one open and dissect it.

i wouldn't-

higher voltage caps are not all that cheep.

post #5 -

http://www.diyaudio.com/forums/solid-state/15212-trw-capacitors-question.html

 

[kstlfido]

Yes, they measure around .45 uf (4.3, 4.6, 4.4, etc.).

 

[gmphadte]

Tektronix 2235 scope has similar caps. I also want to know what they r.

Gajanan Phadte

 

[FlaCharlie]

Caps with hermetically sealed glass ends are oil filled, usually paper in oil. Unless you can find some manufacturer specs somewhere you might have to open one up to check the dielectric. As mentioned earlier, the oil could contain highly toxic PCBs so take extreme care if you open them. Not sure exactly what 'extreme care' would entail. Gloves and mask at least. Then the cap should be disposed of as hazardous waste.

Probably easier to just try them and see if you like them.

. . . Charlie

 

[gmphadte]

They r PIO i.e. paper in oil

For photo, go to
diyaudioprojects.com/Solid/JFET-Phono-Preamplifier-Kit/

Gajanan Phadte

 

[TheGimp]

Those are soviet not US made caps.

This company claims they are film/oil caps, but do not specify what film.

8 NOS vintage TRW 45uF capacitors 3000VDC 3kv hermetically sealed film oil caps