Mini-Kits EFHW 49:1 Autotransformer Kit. This Kit uses the Fair-rite 2643251002 Toroid for high efficiency with a rating of 100 Watts CW ( FT8 ) and an estimated rating of >300 Watts SSB. The Kit includes everything to construct your own Transformer.
Included In the Kit: 1 x 2643251002 Toroid, 1 x D9020 ABS Enclosure, 1.1m x 1mm Enamelled copper wire, Hookup wire for internal connections, 8 x Cable ties, 2x Cable Tie mounts and screws, 2 x M5 Eyelet Hooks, nuts and washers ( Stainless Steel 304 ), 4 x M5.3 Eyelet crimp terminals, 1 x 100pF 500v Silver Mica Capacitor, Your choice of BNC or UHF Female connector.
You will require the following which is not included in the Kit. Wire for the Antenna, >20Metre length for a 40m to 10m band version, or >40m length for a 80m to 10m band version. A counterpoise will also be required on the ground connection of the Autotransformer. For a counterpoise it is suggested that the coax feedline is used and choked off at distance along the feedline using 6 to 8 turns of the coaxial cable through a FT240-43 Toroid. The recommended distance from the Autotransformer is 2 metres for a 40-10m version, or 4 metres for a 80-10m version. The choke provides a reduction of noise from the Radio end appearing at the Antenna, and RF from the Antenna coming down the feedline to the Radio.
This Kit is available with either a BNC or UHF Female socket connector.
Specifications | |
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Frequency Range: | 3 to 30MHz |
Power Rating: | 100W Minimum CW ( FT8 ) >300W SSB |
Toroid: | 43 Material Fair-rite ( # 2643251002 ) |
Turns Ratio: | 49:1 Autotransformer 14 turns tapped at 2 turns |
Enclosure Size: | 88x88x53mm |
Weight: | 255 grams |
End Fed Half Wave 49:1 Autotransformer Kit
- Brand: Mini-Kits
- Product Code: EFHW-49:1-KIT
- Quantity In Stock: On Order
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$41.95
- Export: $38.14