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Dan, I know you were blown-away by the little short vertical radiator producing any RF at all. So was I.

I don't think high gain was the idea for the DDRR. I'm convinced their ideas were all about being able to hear really weak signals at very long distances. They wanted to be able to dig down deep in the QRN and clear up the lower background noise levels. Then they could make all the power they needed to make the TX contacts.

I've modeled a few DDRR ideas and posted some above, but I never had good dimensions, and for sure no real details. I checked out as much as I could find and understand, but guessing dimensions should be a last resort. However, I did see some results that appeared close to what was reported, so I will probably get back to the idea.

Check YouTube, where there might be some of these small magnetic loop ideas you could play with.

<blockquote data-quote="Marconi" data-source="post: 724376" data-attributes="member: 903">Dan, I know you were blown-away by the little short vertical radiator producing any RF at all. So was I. I don&#039;t think high gain was the idea for the DDRR. I&#039;m convinced their ideas were all about being able to hear really weak signals at very long distances. They wanted to be able to dig down deep in the QRN and clear up the lower background noise levels. Then they could make all the power they needed to make the TX contacts.I&#039;ve modeled a few DDRR ideas and posted some above, but I never had good dimensions, and for sure no real details. I checked out as much as I could find and understand, but guessing dimensions should be a last resort. However, I did see some results that appeared close to what was reported, so I will probably get back to the idea.Check YouTube, where there might be some of these small magnetic loop ideas you could play with.</blockquote>

[QUOTE="Marconi, post: 724376, member: 903"] Dan, I know you were blown-away by the little short vertical radiator producing any RF at all. So was I. I don't think high gain was the idea for the DDRR. I'm convinced their ideas were all about being able to hear really weak signals at very long distances. They wanted to be able to dig down deep in the QRN and clear up the lower background noise levels. Then they could make all the power they needed to make the TX contacts. I've modeled a few DDRR ideas and posted some above, but I never had good dimensions, and for sure no real details. I checked out as much as I could find and understand, but guessing dimensions should be a last resort. However, I did see some results that appeared close to what was reported, so I will probably get back to the idea. Check YouTube, where there might be some of these small magnetic loop ideas you could play with. [/QUOTE]

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