Search found 4 matches

by 4nradio
Thu Aug 25, 2022 6:18 pm
Forum: General Discussion
Topic: The small SWL beam (1...30 MHz)
Replies: 117
Views: 35213

Re: The small SWL beam (1...30 MHz)

Thanks for the reminder of back-to-back Bias-T boxes! I had forgotten that I can use them this way. I have an extra identical one to the Bias-T that's powering my ALA1530LN right now (not the Wellbrook supplied unit, but a ham-made pair of Bias-T's). These work well from MW on up. What do you think ...
by 4nradio
Thu Aug 25, 2022 1:09 am
Forum: General Discussion
Topic: The small SWL beam (1...30 MHz)
Replies: 117
Views: 35213

Re: The small SWL beam (1...30 MHz)

The places I DX from a few times a year have significant sea gain (coastal salt water) effect, so I suspect the SULA will perform well there even on the lower end of medium wave. The 50 ohm preamps I currently have on hand are as follows. The Wellbrook module is an old one that I repackaged in an al...
by 4nradio
Tue Aug 23, 2022 9:43 pm
Forum: General Discussion
Topic: The small SWL beam (1...30 MHz)
Replies: 117
Views: 35213

Re: The small SWL beam (1...30 MHz)

Thanks so much for the detailed reply! Although my interests are lower HF and MW, I see the wisdom of keeping this antenna at the design parameters at least to begin. So, when I make this I'll keep as close to the "textbook" as possible including height above ground. I've never used conduc...
by 4nradio
Mon Aug 22, 2022 9:37 pm
Forum: General Discussion
Topic: The small SWL beam (1...30 MHz)
Replies: 117
Views: 35213

Re: The small SWL beam (1...30 MHz)

Hi Andrew & 13dka, I can't thank you enough for your detailed instructions, NEC modeling results, and observations on this antenna! You've put a lot of effort into documentation and I hope a lot of radio hobbyists give this project a try. I've used Flags and other terminated loops for years duri...