Tag Archives: wspr

Multi Band Slinky Doublet

Posted on April 11, 2016 by Steve Netting OH3SPN

Designing an HF antenna for Swindon Makerspace presented several challenges:- Routing coax from Makerspace to the roof is potentially tricky High external vertical antennas would require lightning protection No convenient external earths available Counterpoises impractical due to size Large horizontal … Continue reading →

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Random Wire Loop Antenna

Posted on March 9, 2015 by Steve Netting OH3SPN

I’ve recently been researching multi band antennas. My first thought was to remove the balun from my 40m dipole, feed with ladder line from an external auto-ATU and treat as a doublet. However, in several auto ATU manuals one antenna … Continue reading →

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