Return to Answer

See this YouTube video titled: "The 49:1 Half-Wave End-Fed Antenna Transformer, Part 1." https://www.youtube.com/watch?v=MgZap6xWZLs

It says:

49:1 with 3 to 21 windings on the transformer is good for 40m & 80m bands

and

49:1 with 2 to 14 windings on the transformer is good for 40m, 20m & 15m bands.

I made the 2 to 14 with an FT240-43 toroid and 100 pF capacitor. I connected a 66ft vertical wire in a tree and SWR is less than 1.3 on 40m, 20m & 15m bands.

See this YouTube video titled: "The 49:1 Half-Wave End-Fed Antenna Transformer, Part 1." https://www.youtube.com/watch?v=MgZap6xWZLs

It says:

49:1 with 3 to 21 windings on the transformer is good for 40m & 80m bands

and

49:1 with 2 to 14 windings on the transformer is good for 40m, 20m & 15m bands.

I made the 2 to 14 with an FT240-43 toroid and 100 pF capacitor. I connected a 66ft vertical wire up a tree with 15 meters of coax and SWR is less than 1.3 on 40m, 20m & 15m bands.

See this YouTube video titled: "The 49:1 Half-Wave End-Fed Antenna Transformer, Part 1." https://www.youtube.com/watch?v=MgZap6xWZLs

It says:

49:1 with 3 to 21 windings on the transformer is good for 40m & 80m bands

and

49:1 with 2 to 14 windings on the transformer is good for 40m, 20m & 15m bands.

I made the 2 to 14 with an FT240-43 toroid and connected 66ft of wire. SWR is less than 1.3 on 40m, 20m & 15m bands

See this YouTube video titled: "The 49:1 Half-Wave End-Fed Antenna Transformer, Part 1." https://www.youtube.com/watch?v=MgZap6xWZLs

It says:

49:1 with 3 to 21 windings on the transformer is good for 40m & 80m bands

and

49:1 with 2 to 14 windings on the transformer is good for 40m, 20m & 15m bands.

I made the 2 to 14 with an FT240-43 toroid and 100 pF capacitor. I connected a 66ft vertical wire in a tree and SWR is less than 1.3 on 40m, 20m & 15m bands.

See this YouTube video titled: "The 49:1 Half-Wave End-Fed Antenna Transformer, Part 1." https://www.youtube.com/watch?v=MgZap6xWZLs

It says:

49:1 with 3 to 21 windings on the transformer is good for 40m & 80m bands

and

49:1 with 2 to 14 windings on the transformer is good for 40m, 20m & 15m bands.

See this YouTube video titled: "The 49:1 Half-Wave End-Fed Antenna Transformer, Part 1." https://www.youtube.com/watch?v=MgZap6xWZLs

It says:

49:1 with 3 to 21 windings on the transformer is good for 40m & 80m bands

and

49:1 with 2 to 14 windings on the transformer is good for 40m, 20m & 15m bands.

I made the 2 to 14 with an FT240-43 toroid and connected 66ft of wire. SWR is less than 1.3 on 40m, 20m & 15m bands