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
(70 feet). Signal change as I tune the phasing control can be dramatic
as the pattern changes.
Performance is similar to a single one-wavelength Beverage, and in some
conditions signals are equal to my phased Beverages.
I have under construction a broadside-endfire set of four short
verticals that will use an NCC-1 to phase rather than a fixed line.
I have also used combinations of Beverages with the NCC-1 and the
results vary.
73/Jon AA1K
On 11/17/2013 4:54 AM, Carsten Esch wrote:
... 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. You may have to experiment to find the best antenna, but
successful operation occurs more
often with similar antennas.
Use with Beverage or Other Low Noise Antennas
The NCC-1is probably most useful when used to enhance reception on
lower frequencies. The NCC-1
is often useful even if the station already employs low noise
directional receiving arrays.
A suggested method follows:
Connect one Beverage or other similar low noise receiving antenna to
INPUT A
Connect another Beverage or another low noise receiving array to INPUT B
Connect theNCC-1 RECEIVER connector to the receiver's input line.
If you are using a Reversible Beverage, runtwo feedlines back to
theNCC-1 INPUT connections. Then use the NCC-1 to control the
directivity and nulls.
----
Any suggestion on how to use the unit best? Set up another single RX
Element? Use 'the tower'?
Thanks!
Carsten, DL6LAU
Am 17.11.13 00:34, schrieb Tom W8JI:
What is the best acquisition between Timewave ANC-4 or MFJ-1025?
While all of them will work, the Timewave phase adjustment causes a
huge change in level. It also has less phase range. That is bad,
because you have to go back and forth between the controls more.
The phase should really only change phase, and the level or balance
should really only change the signal levels. The MFJ is much better
at control action than the Timewave, and it has much better IMD
performance. The DXE NCC is, of course, better than the MFJ for
everything. The DXE has much wider phase range and better IM
performance, but you pay for the complexity.
73 Tom
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