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Unknown part

J

Jack Schwab

Jan 1, 1970
0
Offhand, I would say it's a .l mfd 63v cap
 
G

Gerard Bok

Jan 1, 1970
0
I was hoping someone could identify this part for me. I've asked a few
people and no seems to know what the part is, I thought maybe a large
resistor.

Info on it:

100:
63V DC
2%73

http://www.fullmotions.com/downloads/part.jpg

Looks like a high precision capacitor, as used in filters for
e.g. modems in the 1960-70.

So 73 might well be the year of production: 1973
And 2% is not bad at all for a capacitor :)
 
E

Edd Whatley

Jan 1, 1970
0
.1 ufd
63 VDC (or pulsating DC)
2% tolerance
Polyester cap

73's de Ed
 
A

Arfa Daily

Jan 1, 1970
0
Edd Whatley said:
1 ufd
63 VDC (or pulsating DC)
2% tolerance
Polyester cap

73's de Edd

Hi Edd

Interested to know how you arrived at a value of one mic rather than point
one. I was assuming that the " 100 " was 100nF, as it is common convention
to mark caps in nF's ?? Mic ( no pun !! ) back to you sir ...

Arfa
 
S

Smitty Two

Jan 1, 1970
0
Arfa Daily said:
Hi Edd

Interested to know how you arrived at a value of one mic rather than point
one. I was assuming that the " 100 " was 100nF, as it is common convention
to mark caps in nF's ?? Mic ( no pun !! ) back to you sir ...

Arfa

Edd's post showed up on my server as point one. My dad was a college
professor and he always deducted one point for answers less than one
that did not include a leading zero. Too easy for that decimal point to
get lost, or be confused with a speck of fly shit.
 
Typo it's 100k not 100: sorry.

Also anyone think these things are still good? I've had them for like
10 years and they where at a local hospital for like 10 more.

Thanks,
Dan.
 
A

Arfa Daily

Jan 1, 1970
0
Typo it's 100k not 100: sorry.

Also anyone think these things are still good? I've had them for like
10 years and they where at a local hospital for like 10 more.

Thanks,
Dan.
All the same thing - makes no odds. The " K " usually refers to the
dielectric type I seem to recall. The important bit is the " 100 ". Caps
below 1uF and above 1000pF, are usually marked in nanofarads ( 1000's of
picofarads ) so 100 would normally mean 100nF or 0.1uF. However, when caps
of this sort of value are marked by coloured stripes, then they are usually
in picofarads, so a 100nF cap will be brown black yellow, which equates to
100,000 picofarads, so even if the letter " K " is part of the value, this
still makes the marking read 100,000, which is the same as it would be
marked if it was striped _ if you see what I mean !!

As far as the caps still being ok goes, the answer to this will be 99.9%
yes. Polyester or similar dielectric caps, do not deteriorate. However, the
wise man, would run a capacitance meter over them first, just to be sure ...

Arfa
 
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