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This UNUN tested and working item 450W version!
T183 toroid coated with epoxy paint for extra durability.
Design 3-52MHz, best 3-30 frequency response and is very efficient.
Power rating 450 W SSB,
Windings of trifilar enameled wire.
Insertion loss is < 0.6dB (measured on miniVNA)
All hardware is Stainless Steel
The unun is installed in a weatherproof 90mm X 65mm X 40mm IP65-ready box, that are excellent for outdoor installation when a lid is sealed. (photo as an example only)
T130-8/90 toroid coated with epoxy paint for extra durability.
Design 1.8-30MHz frequency response
Transfformation ratio: 1:1(default) or 4:1 (on request)
Power rating 150 W SSB @ SWR ...