Model 4130 - 4:1 Unun 1.5 - 54 MHz - 300 watts

Designed for use with end fed wire antennas and multiband verticals,  this unun is small, compact and perfect for quick portable/emergency installations. This 4:1 Unun (200-50 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.  A 28-31  foot wire will allow 40 thru 10 meter coverage and a 43-50 foot wire will provide access to 80 thru 10 meters.  A good ground or counterpoise is also required.

This model also works well with any of the 19, 31 and 43 foot portable verticals and the wing nut model makes setup and breakdown quick and easy.  If you have a 43 foot vertical, a long wire over 200 feet and/or want to run high power, consider the model 4132s or model 4134s which provides additional inductive reactance for enhanced performance on the lower bands. 

Installation Notes and Recommended Wire Lengths

**CAUTION**

The enclosure for our low power units is small, lightweight and portable, but not intended for long term or permanent outdoor use. If used in a permanent outdoor installation, additional attention must be given to weatherproofing and strain relief. Damage caused by such use is not covered under our warranty.

BNC & N connectors are available in "Accessories & Connectors" section of our website

Specifications

Installation Notes