[TechAssist] Re: Glass resistors?
- From: "Bil Green" <tv.vcrrepair@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 8 Mar 2002 23:35:03 -0800
Gary,
These are usually metal film resistors. I have seen the ones with holes
many times in
older equip.
Actually, the 2W ones I have are rather large for the Wattage rating. If in
doubt I use
a 2W (for the smaller ones at least).
Bil
----- Original Message -----
From: "Gary McCartney" <number63@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, March 08, 2002 10:51 PM
Subject: [TechAssist] Glass resistors?
>
>
> I have a bunch of resistors which feel very light. They
> have 4 little holes in them around the leads at each end. Holding them
> up to a light, you can see all the way through them to the other end.
> They look
> about the size of an old 2W carbon type resistor. I took my cutters to
> one to figure out what was on the inside, and found it to be hard as a
> rock, and when I got through the blue covering (powdery sort of paint),
> I found it was glass!
> The resistance element looks like a surface mounted track around the
> outside of the glass cylinder. I'd like to learn what the
> characteristics of these are. Are they flameproof? Are they rated high
> in Watts for the size of them? Can they replace regular metal film
> resistors for general use? Will they snap if too much heat is generated?
>
> checked Google and haven't found the answer yet.
>
>
> I have a few different values. They are color coded and the resistance
> measurements match the colors the same as regular resistors.
>
> I have posted a picture of a 10k Ohm resistor (size of a 2 Watt), along
> with the one I cracked open, at:
>
>
> http://www.number63.ca/glass-resistors.jpg
>
> Anyone familiar with these?
> --
>
>
>
> Gary McCartney
>
> McCartney Electronics
> 7134 Fife Rd, RR 7
> Guelph Ontario Canada N1H 6J4
> Fax: (519)821-1530
> email: number63@xxxxxxxxxxxxx
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