High-efficiency / High power 49:1 transformer for EndFed Half Wave (EFHW) antenna
Up to 2,5KW SSB
From 40 up to 10m (usable on 80m too)
Classical 49:1 baluns/transformers are based on FTxxx-43, with wide spaced windings, and a crossover.
But do you know that such design has a poor efficiency, down to 66% and up to 80% max only?
Don't you want your RF power to be really radiated, without excessive heating, limiting your output power?
Unique design worldwide
==> Get the most efficient "QRO" 49:1 solution with this unbeatable product !
- Efficiency measured > 90% from 40 up to 10m (up to 98%)
- 2,5KW SSB rated from 40 up to 15m
- 1KW SSB rated on 10m
- Usable on 80m at "lower" 500W SSB rating
- SWR < 1,6:1 on a 2450 Ohms load on ALL bands ! (2,2:1 on 80m)
- Close-wound windings + autotransformer (14/2 turns ratio)
- Genuine 3x FT240-61 toroids from Fair-rite + 3x47pF capacitor from TDK (6Kv rated each) ==> unique design on the market !
- 2mm dual coated enameled wire
- 11,5x9cm waterproof ABS box, with 4 pre-drilled holes for easy mounting (mast, wall, etc)
- Stainless steel eyebolt for strain relief
- Counterpoise external connection available
- Input = PTFE SO239 connector
- Output = M6 stainless steel A4-grade screw with wing-nut and ceramic insulator
All devices are checked before shipping and I ship worldwide !
Be sure of what you get, this is made in France, by a ham, for hams !
73
Ronan F8AFC