RE: [ST] Electrics

[jpfreitag@xxxxxxxx]

Your Mileage May Vary.

Great picture BTW. Liked the bmp detail... converting to jpg lossyness is
obvious.

- -----Original Message-----
From: owner-st@xxxxxxxxxx [mailto:owner-st@xxxxxxxxxx]On Behalf Of Chris
Strizver
Sent: Friday, September 28, 2001 9:59 AM
To: ST@xxxxxxxxxxxxxx
Subject: RE: [ST] Electrics


Fair enough. I'll let you know when mine fails, if ever. I think the
advantages of using one long wire outweigh any longevity you may see with
nichrome wire. If I get 5 years out of my jacket and save $150-$200, it'll
be worth it. I expect anyone who uses copper will get more than that.

Its really too bad that nichrome wire has such high resistance. If it were
just a little bit more conductive, you could make a really nice liner with
bigger wire that is easier to solder and connect to. Does anyone know of a
low price/low resistive alternative to nichrome and copper? Dividing your
liner into parallel sections is just a pain!

I think this fits: YMMV  <----- Never been able to figure out what exactly
that stands for, but I got the gist.


- -Chris Strizver


 -----Original Message-----
From: 	owner-st@xxxxxxxxxx [mailto:owner-st@xxxxxxxxxx]  On Behalf Of
Charlie McCullough
Sent:	Friday, September 28, 2001 5:25 AM
To:	ST@xxxxxxxxxxxxxx
Subject:	Re: [ST] Electrics

Copper is annealed by heat. Bending or stressing embrittles/hardens it.

That's why you heat copper to reuse it after having distorted crystaline
structure by stressing (such as for oil drain plug). The heating  recovers
crystaline structure distorted by bending/stress..

Copper will embrittle/harden when subject to "wear" (i.e.
bending/stressing). But heat cycling (annealing) as a general rule softens
(there are some specialty "pure" copper alloys that behave differently).

Copper might be a poor choice for heated clothing - especially when compared
to the Nichrome. But not from the properties associated with heating/cooling
cycles......

Just my $.02

Charlie McCullough
tz250 WERA #90
Lottsa Ducs
Triumph ST

- -----Original Message-----
From: Andrew Bell <abell@xxxxxxxxxxxxxxxx>
To: ST@xxxxxxxxxxxxxx <ST@xxxxxxxxxxxxxx>
Date: Thursday, September 27, 2001 11:11 AM
Subject: RE: [ST] Electrics


>It's my understanding that as the copper is subjected to heat/cool cycles
>it will work harden or become brittle. When you add in the fact that the
>wire is in clothing, that will be scrunched, twisted and subjected to wear
>the odds of failure increase over its use in a static design.
>Nichrome is designed for not becoming work hardened when operated within
>its spec's, is rather springy and will hold up to 'wear' in clothing and
>the like.
>
>As usual YMMV,
>
>
>At 04:17 PM 9/26/01 -0700, you wrote:
>>Can you explain why and how copper would wear out? If it makes any
>>difference, its silver coated copper wire, and is sold as high-temp wire.
I
>>see no reason why it would break, as it is very flexible.
>>
>>Thanks,
>>
>>Chris Strizver
>>
>>  -----Original Message-----
>>From:   owner-st@xxxxxxxxxx [mailto:owner-st@xxxxxxxxxx]  On Behalf Of
Andrew
>>Bell
>>Sent:   Wednesday, September 26, 2001 12:45 PM
>>To:     ST@xxxxxxxxxxxxxx
>>Subject:        RE: [ST] Electrics
>>
>>you really might want to stay with nichrome wire , copper won't give you
>>longevity. There are also carbon fibre weave heating elements available. I
>>don't have those sources handy though.
>>
>>
>>At 11:55 AM 9/26/01 -0700, you wrote:
>> >The copper wire that I got is tephlon coated for lower voltage heat
>> >applications. Maybe get some of this instead?
>> >
>> >-Chris Strizver
>> >
>>
>>Andrew Bell, Test Technician
>>Mixed Signals/ULTECH
>>
>>e-mail: abell@xxxxxxxxxxxxxxxx
>>Tel: (203) 758-8667
>>Fax: (203) 758-8693
>>Web:www.mixedsignals.com , www.ultechvideo.com
>>
>>
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>
>Andrew Bell, Test Technician
>Mixed Signals/ULTECH
>
>e-mail: abell@xxxxxxxxxxxxxxxx
>Tel: (203) 758-8667
>Fax: (203) 758-8693
>Web:www.mixedsignals.com , www.ultechvideo.com
>
>
>     *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *
*
>      The ST/RS Mailing list is sponsored by Jack Lilley Ltd.
>          http://www.TriumphNet.com/st/lilley for more info
>   http://www.TriumphNet.com/st for ST, RS and Mailing List info
>


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