I just downloaded the manual on PDF and read the advanced section
dealing with distance to fault. Sorry to say I must not be as sharp
as I used to be and I can't tell from what I've read if the RG6U
needs a termination for this distance to fault test or if the coax is
unterminated. Since it's the
... I would like to try the DXE NCC-1 too (have one sitting here) to
fight some noise on 80/160m ...
I have a Hi-Z 8-circle for RX, TX antenna is a matched tower ...
The DXE manual says:
The NCC generally works best when both antennas have similar patterns,
polarization, and S/N
ratios.
Carsten,
I use one of mine with a pair of the W8JI style short verticals -- 22
feet high with four 22-foot top-loading wires, and 16 radials each 25
feet long. There is a series inductor and resistor at the feedpoint.
These are in a line to make them endfire NE/SW and spaced about 1/8 wave
Hi Bob,
If you are going so far as to removing all the stubs, go one farther. I' ve
heard that the limited High Power problem is because of arc over between the
top of the tower section and the 80m stub mast above it. I've heard several
stories about fireworks at the top of the tower during
How do again Bob,
I forgot to add IF you short the stub at the top then forget about using the
drop wire. Just put the coax feed direct to the bottom of the load coil, and
the top of the coil to the tower base T. Short out the coil for 80m ops. At
least that is where I'd start experimenting.
The most frequent problem (by far) with good noise cancellers is operator
related.
The second most common problem is antenna choice.
Any suggestion on how to use the unit best? Set up another single RX
Element? Use 'the tower'?
When you mix antennas to make a null, the signal levels
Tom,
Thank you for providing this information.
Your time is valuable and we all appreciate your input on these (and countless
other matter)!
73,
Bob AA6VB
Sent from my iPhone
On Nov 17, 2013, at 10:55 AM, Tom W8JI w...@w8ji.com wrote:
The most frequent problem (by far) with good noise
Amen Bob,
Tom really helps a lot of guys and gals with his expertise. Quite a guy.
73 Price W0RI
Tom,
Thank you for providing this information.
Your time is valuable and we all appreciate your input on these (and countless
other matter)!
73,
Bob AA6VB
Sent from my iPhone
On Nov 17,
We have used the DX Engineering NCC-1 for many years at K3LR on 160 meters.
Before the NCC-1 was manufactured we used the MFJ-1025.
The NCC-1 is a major upgrade above the 1025 performance. The 1025 worked
better than all other noise canceller/RX combiners that I could find and
test with including
Like I said - mistakes happen. If the guy who made the mistake realizes he did
so and is will to correct the error that is nothing wrong with that.
Bernie
Bernie McClenny, W3UR
Editor of The Daily DX, The Weekly DX and How's DX?
Two week trial - http://www.dailydx.com/trial.htm
Mr. Tom - W8JI
Et. All Top Band guys.
Mr. Tom, is a great honor for me to receive your comments.
I'm sure everyone thinks like me.
I also want to thank all those who are interested in this subject, and
further development of the technique of noise cancellation in the Top Band.
Any hint is
Hello Marcelo,
Roger on thanking Tom, W8JI!
Tom designed the MFJ-1025 and the DX Engineering NCC-1.
Both MAJOR contributions - helping us to enjoy our Low Band hobby!
73,
Tim K3LR
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Marcelo
Chrispin
As always, Tom has done a great job educating us on this topic. I
completely agree with everything he said about antenna selection for
effective noise canceling. Unfortunately it isn't always possible to
achieve the ultimate. In some cases it may be possible to achieve
some improvement with
Hi Topbanders, I am preparing my next move with the spitfire.
I have one more question (for those with modeling tools?).
In order to detune the elements to allow omnidirectional radiation from the
vertical, authors suggested to ground the elements where they are switched from
director to
Tim. How does a device such as the NCC-1 work with diversity reception on the
K3? Is it useful there or superfluous?
- Original Message -
From: Tim Duffy k...@k3lr.com
To: Marcelo Chrispin marc...@ultracyber.com.br, Tom W8JI w...@w8ji.com
Cc: HAROLD SMITH JR w0ri...@sbcglobal.net,
As Bernie says, Mistakes happen.
Just to re-iterate --- they DID copy my call correctly!! I heard them come back
to me with K9JWV 599! THAT's why I put in the log.
I wouldn't have logged the QSO if he came back K9JJV 599!!! I'd still be
there calling them!! Hi HiI'm ok with the notion it's not
In order to detune the elements to allow omnidirectional radiation from
the vertical, authors suggested to ground the elements where they are
switched from director to reflector which will give you aprox 74.5 mts long
element grounded at the base.
You better have a good HV relay for that!
Hello Steve!
The DX Engineering NCC-1 works very well with the K3. However it does not
use the diversity reception option of the K3 - as all of the antenna
combining and phasing is done in the DXE NCC-1 to allow signals appear out
of the noise.
The K3 diversity (two RX and two antennas) cannot
Many thanks Tomexcellentas usual.
Unfortunately it is impossible to avoid the question.
Good F/B is what I have with little gain which could coincide with your
modeling.
Which could be the element dimension your modeling suggest to improve gain?
Making the director longer to
And one more question -
ON4UN in V5 states that the Spitfire will lose a few db of gain due to
ground losses. How does one calculate near field ground losses? What
software is needed?
A related question is a general one for antennas with near ground
horizontal elements - e.g. Bruce delta
Gentleman, and I say that honestly... :)
I have a resolution to the issue and along with it my thanks for
those who offered really solid ideas to track down. more to the
opportunity to learn, I have much apparently to learn about my 259B
which is more than just a pretty face.
However, the
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