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Homebrew Equipment A place to show, design and discuss the weird and wonderful electronic creations from the hands of individual members. |
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#21 | |
Pentode
Join Date: May 2023
Location: Clovis, California, USA.
Posts: 190
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Why would someone buy one ?
They so cheap to build the hardest part is bending the PCV tubing (heat and sand makes the bend) {Maybe more making there own today. } Dave Quote:
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#22 |
Dekatron
Join Date: Sep 2011
Location: Rugeley, Staffordshire, UK.
Posts: 8,645
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I have to laugh, a lot of people refer to the Wellbrook as being "simple", yet it took someone to reverse engineer one and publish the findings before anyone started to build (copy) them!
I found Andrew easy to deal with and in what was the dying days of the company he made a balun to feed the output of the Wellbrook into a vintage radio for me and supplied it FOC after I'd bought my Wellbrook.
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A digital radio is the latest thing, but a vintage wireless is forever.. |
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#23 | |
Pentode
Join Date: May 2023
Location: Clovis, California, USA.
Posts: 190
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I guess it from point a view.
Dave Quote:
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#24 |
Octode
Join Date: Dec 2012
Location: Stockport, Greater Manchester, UK.
Posts: 1,872
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An equivalent commercial product is the NTi MegaLoop FX Active Loop Antenna at €548. NTI make a range of H-field antennas, including a passive version at €199 but this requires a seriously huge loop of 5m dia. which I think would lose the near-field rejection of local qrn
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#25 |
Dekatron
Join Date: Apr 2009
Location: Oxfordshire, UK.
Posts: 4,739
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In the present day, I struggle to figure out why anyone would buy a commercial mag loop at the prices they ask for. Following Wellbrook's opening of the "mag-loop era", the internet has become flooded with homebrew designs. Anyone starting a "literature review" on the web now would need some time to complete it.
Taking it one step further, there has been a great deal of interest recently in small loop antennas for transmission. This follows a general crack down on the use of large HF antennas in many built-up areas of both the US and EU. The significant downside with the transmitting loops is the very high RF voltages which appear on them. B
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Saturn V had 6 million pounds of fuel. It would take thirty thousand strong men to lift it an inch. |
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#26 | |
Pentode
Join Date: May 2023
Location: Clovis, California, USA.
Posts: 190
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I dod know cost so must
Part hobby for me is making look like it was made in factory. Saving was not a part Dave Quote:
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