Antenna Centre + 4:1 Matching Transformer

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Antenna Centre + 4:1 Balun


A antenna centre with built in 4:1 matching transformer (sometimes refered to as a balun although strictly speaking it's not!). 

  • Feeder strain-relief built in
  • BNC socket
  • Water-resistant construction
  • Antenna wire strain-relief built in
  • Fixing for centre support
  • Lightweight 86g (3 oz.)
  • High performance by design - flat from 3-30MHz
  • Loss < 0.2dB @ 14MHz
  • Matched VSWR < 1.50:1 0.5-60MHz
  • Matched VSWR < 1.15:1 1.8-30MHz
  • 125 Watt power rating

Also useful for pre-matching higher impedance antenna systems such as doublets to bring the VSWR into the matching range of internal antenna tuners. In this application the length of feeder between the transformer and the tuner must be short (certainly no more than a couple of metres - 6 feet).

Note: the transformer is designed with a lip that can be sealed using a silicone sealant if required for use in more permanent installations. We do not supply the balun sealed as this allows users to gain access to the enclosure.

2 Reviews Hide Reviews Show Reviews

  • 5
    Fine product

    Posted by Chris, DL7ACA on 4th Aug 2016

    Very good product. Works and portable the best on the market.

  • 5
    4:1 is good for 160 to 10

    Posted by va3ol on 26th Jun 2015

    It took me an hour to build the 4:1 balun and I actually read the instructions. Easy kit and My antenna analyzer says it is 1:1 from 160 to 10 with a 200 ohm load.
    Now about the buying experience here.
    I ordered May 29th and it arrived June 25. Considering that I chose economy (low price) shipping this is good.
    My order included other items and I think the quality of everything is good.

    I would definately buy here again.