Copyright: 1996 - 2024
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling
2 MB. Its primary purpose was to provide me with ready access to commonly needed
formulas and reference material while performing my work as an RF system and circuit
design engineer. The World Wide Web (Internet) was largely an unknown entity at
the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps
while tying up your telephone line, and a nice lady's voice announced "You've Got
Mail" when a new message arrived...
All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowledged.
My Hobby Website:
Copper wire resistance - RF Cafe Forums
RF Cafe Forums closed its virtual doors in 2012 mainly due to other social media
platforms dominating public commenting venues. RF Cafe Forums began sometime around
August of 2003 and was quite well-attended for many years. By 2010, Facebook and
Twitter were overwhelmingly dominating online personal interaction, and RF Cafe
Forums activity dropped off precipitously. If the folks at
phpBB would release a version with integrated
sign-in from the major social media platforms, I would resurrect the RF Cafe Forums,
but until then it is probably not worth the effort. Regardless, there are still
lots of great posts in the archive that ware worth looking at.
Below are the old forum threads, including responses to the original posts.
|-- Amateur Radio
Gripes & Humor
-- CAE, CAD, &
Test & Measurement
Post subject: Copper wire resistance
Thu Dec 23, 2004 11:10 am
We are working on a new electronic
sensor device which requires the
periodic measurement of a 28AWG
kynar insulated copper wire loop
(ten feet long) under varying ambient
Since the electrical resisitivity of copper increases
linearly with the
ambient temperature, we know the following facts
wire at a temperature of 20C:
Our problem is that we need to know
the electrical resisitivity of copper
wire at each degree reading
between -20C and +70C ( in addition to
the electrical resisitivity
we know that copper has at 20C).
If anyone has a suggestion or
reference for further information, please
advise as soon as possible.
Thanks in advance for your help in this matter.