Model 15113 - 1.5:1 Balun (75 to 50 ohms) 3kW
- SKU:
- 15113
Description
Excellent broadband balun that can be used anywhere there is a need to transform 75 ohms balanced to 50 ohms unbalanced. Its most common use is at the feedpoint of monoband dipoles that have an impedance of 72-75 ohms. This is a two stage unit with a 75 ohm 1:1 current balun wound on the large toroid to generate high levels of RF choking impedance and conversion of the signal from balanced to unbalanced . The output of the balun is then fed into a 1.5:1 unun for impedance reduction to a 50 ohm unbalanced feedline.
Specifications
| Core Material | Custom mix low permeability ferrite by Fair Rite Products for maximum bandwidth. Cores are coated and sealed for long term durability. |
| Winding Type | Two separate windings. Large toroid is 1:1 balun designed at 75 ohms impedance. Winding is 14 gauge Thermaleze wire inserted in teflon tubes. Small core is trifilar wind of thermaleze wire creating a 1.5:1 Unun providing the impedance transformation from 75 ohms to 50 ohms unbalanced. |
| Winding Material | Essex heavy build polyamideimide Allex 240 Winding Wire Standard wall Teflon tubing. |
| Power Rating | 1.5 to 35 MHz - 3kW All ratings based on resonant load. High SWR will reduce power handling ability. |
| Useable Frequency | 1.5 to 31 MHz |
| Insertion Loss | Less than .03 db |
| Connectors | SO-239 connectors are gold center conductor with Teflon insulation. Studs and eyebolts are 1/4 inch. Alternate connectors and Mounting Options are available in the Accessories section. |
| Hardware | All Stainless Steel |
| Enclosure Type |
NEMA rated 4x marine grade junction box for outdoor installations. Cover utilizes integral neoprene gasket for weatherproof integrity. |
| Dimensions | 4x4x2 inches for main body of unit Dimensional Drawing of Standard Enclosure |
| Additional Info | Very high efficiency. Will not heat up or saturate at like many of the "less expensive" designs. |
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