"John Smith" wrote:
This looks like a new idea to me. I will wind a couple/few and play
with them. If they perform as you state--this is revolutionary.
Now be prepared for attacks from the ego freaks and religious radio
zealots... ESPECIALLY if you are correct... grin
John
John,
Thank you. I went looking through the extensive literature that I have
here before sitting down and coming up with this. After it was all modeled,
prototyped, and tested I could only wondered why I had not seen something
like this earlier.
I've modeled this as ideal transformers, real-world transformers (with
losses and parasitics), ideal transmission lines, and lossy transmission
lines and it comes out the same, with minor variations of course. I
prototyped it with short coaxial cables as I did in order to minimse the
parasitics and show that the models and the concept were basically valid.
I'm already catching some flak, but so far it's mostly pointless dribble
and obfuscation. You wouldn't believe some of the nonsense that I've been
seeing. One person claims that in order to use ferrite properly with
coaxial cables to make them appear shorter the ferrite has to be inside the
cable between the outer braid and the centre conductor. He was immediately
slam-dunked into the kill filter.
Chris
,----------------------. High Performance Mixers and
/ What's all this \ Amplifiers for RF Communications
/ extinct stuff, anyhow? /
\ _______,--------------' Chris Trask / N7ZWY
_ |/ Principal Engineer
oo\ Sonoran Radio Research
(__)\ _ P.O. Box 25240
\ \ .' `. Tempe, Arizona 85285-5240
\ \ / \
\ '" \ IEEE Senior Member #40274515
. ( ) \
'-| )__| :. \ Email:
| | | | \ '. http://www.home.earthlink.net/~christrask
c__; c__; '-..'.__
Graphics by Loek Frederiks
"Chris Trask" wrote in message
ink.net...
In recent days on the QRP-L mailing list, the following remarks
were
made by Tom Rauch, W8JI regarding the design of 4:1 current baluns:
"...it is impossible to build a 4:1 ratio current balun that
uses two 1:1 baluns on a single core."
and:
"It's well established any balun made up of series / parallel
transmission lines requires different voltages from the start
to finish of each transmission line. "
I have devised and modeled a 4:1 current balun using two 1:1 baluns on
a
single core, and have tested a fully functional prototype. The design
can
be built without any core, if so desired. The full disclosure of this
design with all theory, references, and test results can be obtained
from my
web page at:
http://www.home.earthlink.net/~chris...k4to1Balun.pdf
The design proves beyond all reasonable doubt that the above
statements to
the contrary are, to put it mildly, gravely in error.
Chris
,----------------------. High Performance Mixers and
/ What's all this \ Amplifiers for RF Communications
/ extinct stuff, anyhow? /
\ _______,--------------' Chris Trask / N7ZWY
_ |/ Principal Engineer
oo\ Sonoran Radio Research
(__)\ _ P.O. Box 25240
\ \ .' `. Tempe, Arizona 85285-5240
\ \ / \
\ '" \ IEEE Senior Member #40274515
. ( ) \
'-| )__| :. \ Email:
| | | | \ '. http://www.home.earthlink.net/~christrask
c__; c__; '-..'.__
Graphics by Loek Frederiks