9:1 Unun 400W

£41.99 inc. tax
Product Code: 1X0t2HO Units in Stock: 3

9:1 Unun 400W

9:1 Unun using a T200-2 core ptfe wound then 9 trifilar windings around the toroid core. An unun is an impedance transformer, usually 4:1 or 9:1 , which matches an unbalanced antenna to a 50 ohm coaxial cable which is also an unbalanced feedline. (Hence the name Unun Unbalanced input to Unbalanced output)
A 9:1 transformer is often used for an end-fed half wave antenna. Or a non resonant longwire or Vertical Antenna for multiband use with an Antenna tuner.

In the case of a 9:1 Unun it's job is to transform an impedance of 450 ohms at the antenna to 50 ohms at the radio, 50 ohms being the common standard of impedance of most radio equipment at the antenna sockets.

T200-2 core
Ptfe wound Core
Ratio 9:1 450 ohm to 50 ohm
Power Rating 400W
9 trifilar windings of enamel copper wire 1mm diameter
S0239 Connector
Enclosure L100mm W68mm H55mm
A2 Stainless Steel Lifting eyes
power rating 400W
Weight 303g
Made in the UK by M1ECC-Antennas

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9:1 Unun 400W
9:1 Unun 400W