http://www.wimo.com/bilder/kel-head1.gif

Kelemen Dipole Antennas

We manufacture high performance λ/2-antennas made from high quality materials. The most prominent features are:

Besides the fullsize dipoles we offer shortened dipoles which are favorable when you have only limited space available. The shortened dipoles use extension coils made from Teflon cable. The stronger the shortening the smaller the useable bandwidth, in some cases an antenna tuner might be required.
Like all Kelemen antennas the shortened dipoles are very light and weather and temperature resistant as well.

Kelemen Trap Dipole Antennas

Trap Antennas - what is that?
By insertion of tuned circuits (traps) into each side of a dipole additonal resonances can be produced. Trap dipoles are usually a little bit shorter than fullsize dipoles and offer multi-band operation at places, where space does not permit to install larger antennas.
But with such dipoles the larger weight due to the traps has to be considered: traditional traps have a high weight and lead to much higher tension forces of the wire, the antenna has a sag in the middle. Due to the loss of average height the radiation angle climbs and the efficiency drops. So it is important to manufacture traps with as little weightas possible.
Further, trap dipoels are no wide band antennas: The SWR climbs rapidly when working off the resonance frequency. In some cases the use of an antenna tuner is required.
The location of a trap dipole is more critical than with monoband dipoles. The antennas should be placed (as with any antenna) as high and as free of obstructions as possible, to avoid shifting the resonance frequency. Install as far away from buildings as possible. As a reference height for the design of the Kelemen dipoles we assume an average height of 10m above ground. 

Kelemen antennas are wire antennas with traps made from teflon isolated coaxial cable.

Properties of Teflon (PTFE):

The coaxial traps are very light compared to traditional traps, allowing a better average height above ground. Many portable operations prefer these light antennas because a simple glassfibre pole is often sufficient to lift the antenna. The special traps of Kelemen antennas have a high Q and therefore low losses. All baluns come with a lug for installation.

Inverted Vee installation of wire antennas
If, due to space limitations, the antenna can not be installed in a horizontal manner, the inverted-V mounting is a good alternative. The radiation angle is lowered and more suitable for DX, and only one center pole is required for installation. The angle between the two dipol side should be between 90 and 130 degrees, and it should not be less than 75 degrees. The ends of the wire should not touch the ground but end some meters above ground, perhaps they require extensions with insulating rope.

Kelemen antennas are manufactured from high quality materials. All cast parts are milled from weather proof polycarbonate; all hardware like screws, washers, nuts and clamps are made from stainless steel. Our baluns have a bolted, clear polycarbonate case and are not filled with insulating plastic like other baluns. This makes the production of these baluns much more expensive, also because we still have to make the baluns weather resistant, but this method has a clear benefit: In case of an 'accident' you can fix the balun yourself. And it is much lighter than other, conventional baluns.

Included in delivery: Antenna ready to use incl. balun with PL socket and incl. insulators.

Kelemen antennas are made for power loads from 200 to 2000 watt, depending on model, see table.

Kelemen Multiband Trap Dipoles



Model Max. Power (PEP) Length Bands Order No.  
DP-160804030 400 W 45m 160, 80, 40, 30 11500.L843 255.00 
DP-160804030-H 2kW 46m 160, 80, 40, 30 11500.L843H 279.00 
DP-1608040 400 W 52m 160, 80, 40 11500.L84 178.00 
DP-1608040-H 2kW 54m 160, 80, 40 11500.L84H 229.00 
DP-1608040-H-P 2kW 52.5m, SSB band 160, 80, 40 11500.L84H-P 229.00 
DP-16080-H 2kW 66m 160, 80 11500.L8H 199.00 
DP-16080-SH 2kW 48m 160, 80 11500.L8SH 199.00 
DP-8040 400 W 30m 80, 40 11500.84 128.00 
DP-8040-S 400 W 27m 80, 40 11500.84S 128.00 
DP-8040-H 2kW 32m 80, 40 11500.84H 199.00 
DP-8040-SH 2kW 27m 80, 40 11500.84SH 199.00 
DP-804020 400 W 26m 80, 40, 20 11500.842 169.00 
DP-804020-H 2kW 28m 80, 40, 20 11500.842H 229.00 
DP-8010 400 W 37m 80, 10 11500.81 128.00 
DP-801510 400 W 31.5m 80, 15, 10 11500.851 159.00 
DP-8040201510 400 W 22m 80, 40, 20, 15, 10 11500.84251 269.00 
DP-8040201510H 2 kW 22m 80, 40, 20, 15, 10 11500.84251H 309.00 
DP-804030 400 W 27m 80, 40, 30 11500.843 169.00 
DP-804030-H 2kW 28m 80, 40, 30 11500.843H 229.00 
DPK-8040 400 W 22m 80, 40 11500.K84 153.00 
DPK-8040-M 1kW 22m 80, 40 11500.K84M 204.00 
DP-4020 400 W 16m 40, 20 11500.42 137.00 
DP-4020H 2 kW 17m 40, 20 11500.42H 153.00 
DP-4020-S 400 W 14m 40, 20 11500.42S 137.00 
DP-4030 400 W 16.8m 40, 30 11500.43 137.00 
DP-4030-H 2kW 16.8m 40, 30 11500.43H 178.00 
DP-40201510 400 W 11.6m 40, 20, 15, 10 11500.4251 204.00 
DP-201510 400 W 7.6m 20, 15, 10 11500.251 153.00 
DP-201510-H 2kW 7.6m 20, 15, 10 11500.251H 188.00 
DP-WARC 3 Band 400 W 10m 30, 17, 12 11500.376 153.00 
DP-WARC+40 400 W 12.6m 40, 30, 17, 12 11500.4376 199.00 
DP-WARC+8040 400 W 22.0m 80, 40, 30, 17, 12 11500.84376 255.00 
DP-4030201510 400 W 10.6m 40, 30, 20, 15, 10 11500.43251 255.00 

Kelemen Moneband Dipoles

Model Max. Power (PEP) Length Bands Order No.  
DPK-160-24m 1kW 24m 160 11510.KL24 169.00 
DPK-160-32m 1kW 32m 160 11510.KL32 169.00 
DPK-160-38m 1kW 38m 160 11510.KL38 169.00 
DPK-80 1kW 19m 80 11510.K80 169.00 
DPK-40 1kW 12m 40 11510.K40 149.00 
DP-80 1kW 39m 80 11510.80 129.00 
DP-80-H 2kW 39m 80 11510.80H 149.00 
DP-40 1kW 20m 40 11510.40 129.00 
DP-40-H 2kW 20m 40 11510.40H 149.00 
DP-30 1kW 15m 30 11510.30 129.00 
DP-20 1kW 10m 20 11510.20 102.00 
DP-17 1kW 8m 17 11510.17 102.00 
DP-15 1kW 7.5m 15 11510.15 102.00 
DP-12 1kW 6m 12 11510.12 102.00 
DP-10 1kW 5m 10 11510.10 102.00 
DP-6 1kW 3m 6 11510.6 79.00 

 

Kelemen Moneband Dipoles

Model Max. Power (PEP) Length Bands Order No.  
DPD-8040 1kW 39m 80, 40 11520.D84 135.00 
DPD-8040-H 2kW 39m 80, 40 11520.D84H 149.00 

 

Kelemen 4-band Wire Groundplane

4-Band portable Wire Groundplane following the Kelemen principle.

For 40/20/15/10m coil, winds up to a tiny package, lightweight.

Basically the antenna consists of half a Kelemen antenna and a radial set (1 radial per band, fine to add more yourself). With the antenna and a fibreglas mast you'll be on air on all 4 mentioned bands QRV in a flash. The feed has a PL female connector. Length of radiator 5.8m, weight 670g, power rating 400W.

We recommend to put the radials not directly on the ground, but rather to have the antenna base at 1-2m height and wire up the radials diagonally down near to the ground. The ends of the radials should NOT be grounded then!

Order No.
11505.4251 Kelemen 4-band Wire Groundplane 99.00
18338.08 Fiberglas mast 8m 39.50
18338.10 Fiberglas mast 10m 54.50
18339 Bag for Fiberglas masts 5.00

 

Kelemen Baluns

 Our baluns have a bolted, clear polycarbonate case and are not filled with insulating plastic like other baluns. This makes the production of these baluns much more expensive, also because we still have to make the baluns weather resistant, but this method has a clear benefit: In case of an 'accident' you can fix the balun yourself. And it is much lighter than other, conventional baluns. Each balun has a hook formounting and is equipped with a PL socket.


Balun 1kW

Balun 2kW
Transmission ratio Impedance Power Application Order No.  
1:1 50 Ω 1kW (CW) Dipole 11530.1.1000 67.00 
1:2 100 Ω 1kW (CW) Loop 11530.2.1000 67.00 
1:4 200 Ω 1kW (CW) Folded Dipole 11530.4.1000 67.00 
1:6 300 Ω 1kW (CW) Windom 11530.6.1000 67.00 
1:9 500 Ω 1kW (CW) T2FD 11530.9.1000 67.00 
1:1 50 Ω 2kW (CW) Dipole 11530.1.2000 79.00 
1:2 100 Ω 2kW (CW) Loop 11530.2.2000 79.00 
1:4 200 Ω 2kW (CW) Folded Dipole 11530.4.2000 79.00 
1:6 300 Ω 2kW (CW) Windom 11530.6.2000 79.00 
1:9 500 Ω 2kW (CW) T2FD 11530.9.2000 79.00 
1:9 unun / 450 Ω 20W Longwire 11535.20 42.00 
1:9 unun / 450 Ω 1kW Longwire 11535.1000 67.00 
1:9 unun / 450 Ω 2kW Longwire 11535.2000 79.00 


 

Universal mount for baluns

Universal Mount for 1KW Baluns
For easy installation of baluns on a horizontal or vertical tube up to 50mm diameter. Solid aluminium plate, complete with 3 sets of U bolts and mounting hardware, all stainless steel. Of course also suitable for other baluns with max. 50mm diameter.

Order No.
11538 Balun Mount 19.50

Alle prijzen zijn inclusief BTW., maar exclusief verzendkosten.
Tussentijdse prijswijzigingen en typefouten voorbehouden.
Fabrikanten kunnen specificaties en uitvoeringen wijzigen.