This antenna is an excellent choice for an efficient, High Power End Fed Half Wave (EFHW) for your home QTH where you need an SO-239 coax connector.
 
Built using a two T240-43 Fair-Rite 2643803802 cores, 49:1 winding, 3kv 100PF TDK capacitor and all stainless-steel components. The antenna is built to last. 
 
We can supply the antenna as a transformer only, or with 80m or 40m band antenna wire options. 
 
Select 80m band option to resonate on 80m, 40m, 20m, 15, and 10m with no ATU.
 
You can also use the antenna on 30m, 17m and 12m bands, although you may need to use an ATU.
 
Select 40m band option to resonate on 40m, 20m, 15, and 10m with no ATU. You can also use the antenna on 30m, 17m and 12m bands, although you will need to use an ATU.
 
 
Antenna details  
 
Transmit power rated at UK Legal Limit SSB 250w CW/DATA 
Efficient 49:1 transformer 
Genuine 2 x FAIR-RITE 2643803802 cores 
SO239 Socket 
Heavy duty insulator 
All stainless-steel fittings 
Enclosed in an IP65 ABS GREY enclosure with a small hole in the bottom to help with any condensation 
Enclosure has several mounting points if required 
 
Please review the Efficiency sweep and an SWR sweep with a 2.5k resister across antenna and earth connections. If you are familiar with EFHW designs the sweeps will give you some insight into how the antenna will work.
 
The 2xFT240-43 antenna works best for 80m-20m bands with reduced efficiency above 15m band, dropping off at 10m.
 
Note  
We supply antenna wire longer than needed. Therefore you will need to trim the antenna wire to bring the antenna to resonance. 
 
Always check your SWR before using any antenna.  An SWR of more than 1.5:1 may damage your transceiver.