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:
Air core transformer design - 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: Air core transformer design Posted: Mon May
23, 2005 9:29 am
I need to design a high-frequency, low
power air core transformer implemented by conductors printed on PCB.
Does anyone know about an application notes, free software or java
applet which cam assist me in this case
Thanx in advance
Post subject: Air-core
transformersPosted: Mon May 23, 2005 7:18 pm
What sort of frequency
range and powers are you talking about?
Post subject: Re: Air-core transformersPosted: Wed
May 25, 2005 5:19 am
What sort of frequency range
and powers are you talking about?
Less than 20mW....
About the frequency - since i'm dealing with miniature air core
transformer it has to be several hundreds of MHz or even GHz...
Post subject: Re: Air core transformer
designPosted: Tue Jul 26, 2005 2:58 am
Eli Hait wrote:
I need to design a high-frequency, low power air core transformer
implemented by conductors printed on PCB.
Does anyone know about
an application notes, free software or java applet which cam assist
me in this case
Thanx in advance
Post subject: Posted: Tue Jul 26, 2005
So many people go to the trouble to ask questions on this
website, but don't give any details for there requirments.
you designing a transformer? What's the impedance ratio? Is it balanced
to unbalanced? What's the bandwidth? Center frequency?
Post subject: find out transformer capacity
such that voltage drop acrossPosted: Mon Aug 22, 2005 11:03 am
out transformer capacity such that voltage drop across this transformer
is not more than 20% when 500kW motor is started.
(.8 power factor)