TRW Capacitors Question

mrfeedback · 16th May 2003, 03:19 AM

I picked up a test-set at the local recycling center (tip) the other day, and the boards are full of caps marked "TRW TI-99 1% 100V" in values of 2.0, 1.0 and 0.1 and others.
These are axial, white tubular, with potted ends.
Are these PP ?.

Eric.

Nelson Pass · 16th May 2003, 03:45 AM

Sounds like some I used to use which
were PolyCarbonate. Nice caps, too.

mrfeedback · 16th May 2003, 04:07 AM

Hi Nelson, thanks.
Amazing what you can get for $5.00 nowadays.
I bought two large boxes I believe were used for aircraft wiring loom testing - the front panel is covered in very usefull (to me) center off/on/mom toggle switches.
The boards are covered in those caps, green resistors marked RN55D, and old (obsolete) high quality op-amps and buffer IC's.
These machines were made by Texas Instruments, and by the look would have cost a modest house.

Looks to me like a little goldmine of very high quality parts !.

Eric.

Damon Hill · 16th May 2003, 05:57 AM

More likely mylar, but TRW made good quality components.

If you've got a digital voltmeter and a DC voltage source (a 9V
battery will do), charge up one of the caps and then short
the leads together momentarily. Wait a couple of minutes
and measure the residual voltage; if it's around a tenth of a
volt or so, it's probably the Good Stuff.

jcarr · 16th May 2003, 09:40 AM

Eric: If I am not mistaken, TRW is currently known as ASC (American Shizuki Corporation). If you contact ASC, it is possible that they may be able to tell you what your unknown film caps are.

hth, jonathan carr

jackinnj · 16th May 2003, 09:59 AM

TRW "was" one of the most venerable names in the aerospace, automotive and industrial components business. The company was recently taken over, I think by Lockheed Martin.
I should also add "snoop" since they did the electronics for a lot of intelligence satelites.

16th May 2003, 03:19 AM	#1
mrfeedback diyAudio Member Join Date: Feb 2002 Location: Perth, Australia.	TRW Capacitors Question I picked up a test-set at the local recycling center (tip) the other day, and the boards are full of caps marked "TRW TI-99 1% 100V" in values of 2.0, 1.0 and 0.1 and others. These are axial, white tubular, with potted ends. Are these PP ?. Eric. __________________ I believe not to believe in any fixed belief system.

16th May 2003, 04:07 AM	#3
mrfeedback diyAudio Member Join Date: Feb 2002 Location: Perth, Australia.	Bargain. Hi Nelson, thanks. Amazing what you can get for $5.00 nowadays. I bought two large boxes I believe were used for aircraft wiring loom testing - the front panel is covered in very usefull (to me) center off/on/mom toggle switches. The boards are covered in those caps, green resistors marked RN55D, and old (obsolete) high quality op-amps and buffer IC's. These machines were made by Texas Instruments, and by the look would have cost a modest house. Looks to me like a little goldmine of very high quality parts !. Eric. __________________ I believe not to believe in any fixed belief system.

16th May 2003, 09:40 AM	#5
jcarr diyAudio Member Join Date: Jul 2002 Location: Tokyo, Japan	Eric: If I am not mistaken, TRW is currently known as ASC (American Shizuki Corporation). If you contact ASC, it is possible that they may be able to tell you what your unknown film caps are. hth, jonathan carr __________________ http://www.lyraconnoisseur.com/, http://www.lyraaudio.com

16th May 2003, 09:59 AM	#6
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	TRW TRW "was" one of the most venerable names in the aerospace, automotive and industrial components business. The company was recently taken over, I think by Lockheed Martin. I should also add "snoop" since they did the electronics for a lot of intelligence satelites.

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16th May 2003, 03:45 AM	#2
Nelson Pass The one and only Join Date: Mar 2001	Sounds like some I used to use which were PolyCarbonate. Nice caps, too.

16th May 2003, 05:57 AM	#4
Damon Hill diyAudio Member Join Date: Mar 2001 Location: Auburn, WA (somewhere between Seattle and Tacoma) Blog Entries: 1	More likely mylar, but TRW made good quality components. If you've got a digital voltmeter and a DC voltage source (a 9V battery will do), charge up one of the caps and then short the leads together momentarily. Wait a couple of minutes and measure the residual voltage; if it's around a tenth of a volt or so, it's probably the Good Stuff.

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