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  • 49:1 impedance transformer UNUN 10 Watts

49:1 impedance transformer UNUN 10 Watts

  • Brand: Wire Antennas UK
  • Product Code: QRP 49:1-impedance-transformer-UNUN 10 WATTS
  • Availability: 13
  • Short Description: SUPER FLAT SWR QRP 49:1 UNUN the ideal transformer for working 40 to 10 meters while Sota Operational. No tuner required.

  • £30.00

  • Ex Tax: £30.00

2 reviews / Write a review




An impedance transformer (49:1) to feed a high impedance, end fed half wave wire which is likely to be a few hundred ohms, and transform it into something closer to a 50Ω (unbalanced) coaxial input. 10 watts

This is a unun ( unbalanced to unbalanced ) transmission line transformer designed to match 2500Ω  to 50Ω .

It has a constant impedance transformation ratio of 49:1 from 1.81 MHz to 30MHz.

 




Technical specification :

Type :                                               49:1 Unun
Frequency :                                      1.81 MHz – 30MHz
Impedance ratio:                              49:1
Input Impedance:                             50Ω
Output Impedance:                          3200Ω
Power Handling(CW/SSB) :            10W
Core Type :                                      FT110-43 by Fair-rite® Co.
Capacitor 100pF 3KV
Assembled and tested.

 


This is a unun ( unbalanced to unbalanced ) transmission line transformer designed to match 2500Ω  to 50Ω .
It has a constant impedance transformation ratio of 49:1 from 3.5MHz to 30MHz. 

Technical specification :
Type :                                               49:1 Unun
Frequency :                                      1.81 MHz – 30MHz
Impedance ratio:                              49:1
Input Impedance:                             50Ω
Output Impedance:                          2500Ω
Power Handling(CW/SSB) :            10W  of peak power

Core Type :                                      by Fair-rite® Co.

Capacitor 100pF 3KV

Counterpoise connection 

Assembled and tested.
For QRP Kevlar wire click here
 




UNUN Balun 49:1  Type 43 core material giving extremely flat bandwidth.
Note these cores are expensive and beware cheap 49:1'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 80m 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 offer good product customer support.






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