QRP 9:1 Unun 1.5 - 54 MHz 300 watts #9130
|Manufacturer: Balun Designs|
Designed for use with single wire unbalanced antennas, this new addition is small, compact and perfect for quick portable/emergency installations. This 9:1 Unun (450-50 ohms) will easily handle 300 watts and covers 1.5 - 54 MHz. Using this unun will allow transceivers with internal antenna tuners to work most if not all HF bands. For optimum results, please use the link below to select best wire length and lowest SWR. A good ground or counterpoise may also be required.
This unun should be used with the wire lengths listed in the table shown in the above link. Use of the 9130 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 or loops and use with a balanced antenna may cause damage to the unit.
Be sure to look at the unique mounts available for the our line of low power baluns
The enclosure for the low power units is small, lightweight and portable, but NOT intended for long term or permanent outdoor use. If used in a long term outdoor installation, additional attention must be given to weatherproofing and possible strain relief. Damage caused by such use is not covered under our lifetime warranty.
| 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
|| Trifilar wire winding configured as 9:1 unun.
| Winding Material
|| Superior Essex Heavy build polyamideimide Allex 240 Winding Wire
5000v breakdown voltage
| Power Rating
|| 1.5 to 35 MHz - 300 watts, 35 to 54 MHz - 200 watts.
All ratings based on resonant load. High SWR will reduce power handling ability.
|Useable Frequency|| 1.5 to 54 MHz
| Insertion Loss
|| Less than .02db
|| SO-239 connectors are silver plated with Teflon insulation.
Alternate connectors and Mounting Options are available in the Accessories section.
||All Stainless Steel|
| Enclosure Type
|| Polycarbonate (ABS) box with bottom plate that fits flush with the case
Plate is an exceptional fit that can be easily weatherproofed if desired.
|| Very compact 3x2x1.5 inch
| Additional Info
|| Very high efficiency (98-99%).