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If the transformer is used with an external tuner in conjunction with a single wire antenna typically 130-135 feet in length, power should be reduced on those bands that show an SWR above 1.6 to 2:5 without the tuner.
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Chętnie wyświetlilibyśmy opis, ale witryna, którą oglądasz,...
- 80-10m EFHW
If the transformer is used with an external tuner in...
- Model 4935
Stacked cores wound with trifilar set configured for use as...
- 54MHz
I can highly recommend this 9135 - 9:1 Unun, in particular...
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Model 64131e - 64:1 & 49:1 - 80-10m EFHW - Up to 1kW....
- Multiband Verticals & Longwires
Units by Antenna Type. Multiband Verticals & Longwires. ......
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Recommended wire lengths and Installation Notes for Unun models 4932, 4935, 9130, 9132 & 9135. Table shows typical SWR relative to installed wire length. SWR will vary based on topography, proximity of nearby structures, configuration of the antenna wire and choice of ground or counterpoise.
An 80-10 end-fed half-wave antenna can be a very good performing part of an HF station. But its performance depends heavily on a well-designed and carefully constructed 49:1 unun, which matches the long wire impedance to within tuning range of operation. But the perfor-mance of an end-fed antenna is also very dependent on height above ground.
Model 49131 – 49:1 – 80-10m EFHW – Up to 1kW. For those that enjoy the LNR of End fed antennas, but want to run more power, Balun Designs now offers an excellent alternative. Built with the same craftsmanship as all our other units, this new model will allow you to either replace your current matching unit or construct a new higher power ...
This project assembles a 49:1 ferrite-core (“FT”) type #43 transformer that matches 50 ohm input to 2500 ohm end fed antenna. It is optimized for 3.5/7/10/14 MHz but will work reasonably well on all amateur bands from 80 meters thru 10 meters with a 135 foot length of wire and a short connection to ground.
For it's simplicity and small dimensions is very popular for portable or SOTA activities, and also as a static-mobile antenna. This Mini 49:1 UnUn can be used also as the base point of a vertical dipole antenna with its half wave length. MULTIBAND ANTENNA.
64:1 / 49:1 Unun 80-10m EFHW – 1kW 64131e. For those that enjoy endfed antennas but want to run more power, Balun Designs now offers an excellent alternative. Built with the same craftsmanship as all our other units, this new model will allow you to either replace your current matching unit or construct a new higher power end fed half wave ...
