ARRL

Register Account

Login Help

WB7TEM

Joined: Sat, Apr 4th 1998, 00:00 Roles: N/A Moderates: N/A

Latest Topics

Topic Created Posts Views Last Activity
Unun design for digital (FT8) Nov 11th, 14:45 2 429 3 weeks, 6 days ago

Latest Posts

Topic Author Posted On
Unun design for digital (FT8) WB7TEM on 11/11/24
I am looking for a unun design for 100% duty cycle operation in the HF bands. I want to be able to run 300 to 400 watts out, if needed on FT8. I want to place the unun at the point where the coax enters the shack. In my reading I decided to go with a toroid configuration, specifically FT240-43 With 14AWG wire. I believe a double stack of cores would dissipate the generated heat. The thing is, I haven't found a drawing that shows how to wind the cores. Can you help? Thanks.

John, WB7TEM

Back to Top

EXPLORE ARRL

Instragram     Facebook     Twitter     YouTube     LinkedIn