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Broadband Multi-Wire ANTENNA BARRETT

BROADBAND MULTI-WIRE ANTENNA BARRETT BC91200

This antenna consists of three wires connected at the both ends. In the middle of the central wire there is 50W 1250 Ohm resistor. External wires are cut in the middle, attached to isolators and feed through the balun.

a1-dipole

a1-balunBalun is wired on a ring shape ferrite core with diameter 40/25 mmm hight 12 mm.
This dimensions are big enough for 125watts CW, higher power can kill this balun (from autopsy, hi,hi: CW with 500watts fires it for sure – see photo).

On the following photos you can see construction of this balun and assemble of 1250 Ohm resistor (8x10kOhms parallel).a1-balun a1-rezystor

 

ที่มา: http://www.qsl.net/9l1btb/antenna.html

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