Re: The Broadband Butterfly ... an HOA-friendly all-HF antenna for your attic


Jim Jenkins
 

I would question the efficiency of this antenna as a 16:1 balun wired to a 1200 ohm resister would convert the 1200 ohms to 75 ohms and be low vswr as he measured, but the power would almost all be dissipated in the resister rather radiated. Since the connections are lengths of wire there may be some radiation, but since the currents are very low in the wire due to the 1200 ohm impedance I expect this antenna may measure well, but not work well.

Regards,

Jim

AA1J

 

From: TLARC@groups.io <TLARC@groups.io> On Behalf Of George N2APB
Sent: Thursday, January 31, 2019 7:23 PM
To: TLARC@groups.io
Subject: [TLARC] The Broadband Butterfly ... an HOA-friendly all-HF antenna for your attic

 

Build a simple "terminated dipole antenna" for your attic that will operate across the entire HF band ... without an antenna tuner!  

Visit the TLARC home page to learn all about it!

73, George N2APB
www.tlarc.org 

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