9:1 Unun 1.5 - 54MHz - 2kW - #9132
|Manufacturer: Balun Designs|
This design is excellent for matching both long and short length wire antennas for multiband use. Allows the internal tuner of most rigs to tune remotely mounted single wire antennas. This unit utilizes stacked cores for increased power handling and added inductance for the lower frequencies.Be sure to review the various lengths in the link below to obtain the lowest SWR across most if not all HF bands.
This unun should be used with the wire lengths listed in the table shown in the above link. Use of the 9135 for "random" wire lengths, other than shown, can potentially create an impedance that is too low for an ATU to match. If a wire length not shown in the table is installed, an antenna analyzer should used to determine the actual feedpoint impedance that will require matching for each band of operation.
Ununs are intended for use with unbalanced antennas such as verticals and long wires.
They will not work with balanced designs such as dipoles, loops and use with a balanced antenna may cause damage to the unit.
| Core Material
|| Custom mix low permeability ferrite by Fair Rite Products for maximum bandwidth.
Core is coated and sealed for long term durability.
| Winding Type
|| Individual core wound with trifilar set configured as 9:1 unun.
| Winding Material
|| 14 gauge Superior Essex Heavy build polyamideimide Allex 240 Winding Wire.
Windings are inserted into Teflon tubes increasing total breakdown to 10,000 volts.
| Power Rating
|| 1 to 54 MHz - 2kW.
|Useable Frequency|| 1 to 54 MHz
| Insertion Loss
|| Less than .02db
|| SO-239 connectors are silver plated with Teflon insulation.
Studs and eyebolts are 1/4 inch.
Alternate connectors and Mounting Options are available in the Accessories section.
||All Stainless Steel|
| Enclosure Type
|| NEMA rated 4x marine grade junction box for outdoor installations.
Cover utilizes integral neoprene gasket for weatherproof integrity.
|| 4x4x2 inches for main body of unit
| Additional Info
|| Very high efficiency (98-99%).