It was a feeble attempt at humor, given the nearly countable infinity of
posts here on baluns over the last few years including but not limited
to what they are, what they aren't, how they work, do they even work?,
and do they even exist at all. Perhaps my attempt was more feeble than
I
What? You mean the guvmint has classified Carlsbad Caverns now?
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 4/10/2019 11:36 AM, K8TE wrote:
We have one in NM, however I am not allowed to talk/write about it. No, it
has nothing to do with Roswell.
73, Bill, K8TE
I believe I run the highest SWR of anyone here. It is close to 100:1 in
normal operation according to EZNEC (I have never tried to measure it).
The line is open-wire line made with no. 12 (2mm) wire, only about 10m
long. The highest SWR is on 40 meters, and I calculate the loss as
around 1
And for that reason as Roy stated, those components that are rated
"legal limit" are done so under MATCHED conditions. Use a legal limit
component in a condition where SWR is 2:1 or 3:1 or higher and one is
likely to find it becoming a smoke generator at legal limit or even less.
Case and
Hu...see: http://www.dj0ip.de/balun-stuff/
I seem to think this fellow has a good grasp about the "alien origin" of
baluns.
73
Bob, K4TAX
On 4/10/2019 12:23 PM, Fred Jensen wrote:
It also spawned the "balun," a mysterious device that may be of alien
origin since no one seems to
We have one in NM, however I am not allowed to talk/write about it. No, it
has nothing to do with Roswell.
73, Bill, K8TE
--
Sent from: http://elecraft.365791.n2.nabble.com/
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Home:
Or 10:1 or even 20:1. However ... there's always a "however" or a "but"
... it doesn't matter. The dielectric constant of air [the insulator
between open wire conductors] is very close to 1 whereas it is much
larger for various forms of coax. Very high SWR creates very high
voltages along
A typical transmitter does not reverse terminate the transmission line
with its characteristic impedance, so most of the reflected power gets
re-reflected as forward power. Reflected power isn't necessarily lost
power. At least at lower frequencies, it is likely to present a much
higher
For a slightly different answer, take a look at my website www.w3fpr.com
article on Antennas, Transmission Lines, and Tuners.
You can also find that same article preserved at
https://www.qsl.net/w3fpr/ant_article.htm.
73,
Don W3FPR
On 4/9/2019 8:56 PM, Don Sanders wrote:
Since no one has
I agree except that even at 500KW a 2:1 or greater is the norm with open wire
line.
Sent from my iPhone
> On Apr 9, 2019, at 19:10, Fred Jensen wrote:
>
> Well, the reflected power is created by a "virtual transmitter" at the
> feedpoint of the antenna and heads down the coax which has a
Well, the reflected power is created by a "virtual transmitter" at the
feedpoint of the antenna and heads down the coax which has a surge
impedance of Z0 ohms. It meets the SO-239 at the TX and sees an
impedance of Z1, the impedance presented by the PA and output filters.
If Z1=Z0, the power
Since no one has answered your question. I will venture a
supposition that many know but few will speak out.
And some still remember their CB days and the erroneous
advertising saying the power is lost.
Reflected Power flows back down the feed line and is subjected
to the normal feed line loss. It
"...Let's allow the reflected power to increase all the way to 10
watts! At that point, your SWR would be about 2 to 1. Sounds pretty bad, but
surely if you were stranded in the desert and had to use your KX3 and a wire
to get help, you'd be happy to have a match this good...(etc.)"
From
Why does everyone seem to think all the secret, hollow mountains are in
Nevada? I know of one in Colorado and another in Virginia. Umm ...
maybe that's in West Virginia, not sure now. [:-))
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
I chose these scenarios deviously, to
For an interesting discussion..."What happens to the power that's reflected?"
On 4/9/2019 3:42 PM, Al Lorona wrote:
There's always a lot of discussion about measuring SWR, low SWR values, SWR
lights not lighting up, etc. Here's something that might give you a better
'feel' for SWR.
Imagine
Oh My God! A voice of reason! And from here of all places! How absolutely
unexpected!
Thank you sir.
> On Apr 9, 2019, at 12:42 PM, Al Lorona wrote:
>
> There's always a lot of discussion about measuring SWR, low SWR values, SWR
> lights not lighting up, etc. Here's something that might
Thank you Al Lorona!
73
Bob, K4TAX
On 4/9/2019 2:42 PM, Al Lorona wrote:
There's always a lot of discussion about measuring SWR, low SWR values, SWR
lights not lighting up, etc. Here's something that might give you a better
'feel' for SWR.
Imagine that you measure your forward power at 100
My friend Al has described some interesting things about SWR measurement here.
But not all power/swr meters behave this way. In fact the Elecraft W2 meter is
in this class. The designer added an ingenious little circuit to the diodes to
bias them into their linear region. What the smeans is
There's always a lot of discussion about measuring SWR, low SWR values, SWR
lights not lighting up, etc. Here's something that might give you a better
'feel' for SWR.
Imagine that you measure your forward power at 100 W and your reflected power
at only 1 W. You'd probably be very happy about
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