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  • 64:1 impedance transformer UNUN 300 Watts

64:1 impedance transformer UNUN 300 Watts

  • Brand: Wire Antennas UK
  • Product Code: 64:1-impedance-transformer-UNUN
  • Availability: 5


  • £35.00

  • Ex Tax: £35.00

An impedance transformer (64:1) to feed a high impedance, end fed (unbalanced) random wire which is likely to be a few hundred ohms, and transform it into something closer to a 50Ω (unbalanced) coaxial input. 300 watts

This is a unun ( unbalanced to unbalanced ) transmission line transformer designed to match 3200Ω  to 50Ω .

It has a constant impedance transformation ratio of 64:1 from 3.5MHz to 50MHz. The efficiency is 98 percent.

 

Technical specification :

Type :                                               64:1 Unun
Frequency :                                      3.5MHz – 30MHz
Impedance ratio:                              1:64
Input Impedance:                             50Ω
Output Impedance:                          3200Ω
Power Handling(CW/SSB) :             200W /400W and 500W of peak power
Core Type :                                      FT140-43 by Fair-rite® Co.
Capacitor 100pF 40KV
Assembled and tested.

 



This is a unun ( unbalanced to unbalanced ) transmission line transformer designed to match 3200Ω  to 50Ω .
It has a constant impedance transformation ratio of 64:1 from 3.5MHz to 30MHz. The efficiency is 98 percent This is ideal for low to medium bands 160 meters to 20 meters.

Technical specification :
Type :                                               64:1 Unun
Frequency :                                      3.5MHz – 30MHz
Impedance ratio:                              1:64
Input Impedance:                             50Ω
Output Impedance:                          3200Ω
Power Handling(CW/SSB) :             300W  of peak power

Core Type :                                      FT240-43 by Fair-rite® Co.

Capacitor 100pF 3KV

Assembled and tested.

Please note as from January 2021 the boxes are now Black


This transformer requires a feed line choke to isolate the coax feed line from the antenna.


UNUN Balun 64:1  Type 43 core material giving extremely flat bandwidth.
Note these cores are expensive and beware cheap 64:1's will not perform as you expect.
Low Insertion Loss and exceptional match across all HF bands.
Stainless steel hardware. 
Wire is Class H 212 Deg Celsius double coat enamel.
Sealed weatherproof box  Usable Frequency Range 160m to 10m.
High Quality means paying for what you get  Cheap = very inefficient = very hot.
Would you connect anything less to your expensive radio equipment. 
We make 3 models : 300w, 600w and 1 kW all use the same material cores
We offer good product customer support.






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