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Covid..and making phased loop antenna array..
Great work, Simon. I'm sure a lot of folks will be interested. David G3UNA
Great work, Simon. I'm sure a lot of folks will be interested. David G3UNA
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By
David Cutter
· #7542
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Covid..and making phased loop antenna array..
QST March 2015 by DK6ED may be of interest and shows 4 fixed loops in an array, alongside a small rotatable array. The rotatable array looks relatively straight forward to build and his personal web s
QST March 2015 by DK6ED may be of interest and shows 4 fixed loops in an array, alongside a small rotatable array. The rotatable array looks relatively straight forward to build and his personal web s
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David Cutter
· #7536
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Tips to improve LAA+ Performance?
Eric We are only interested in receive capability not transmit, so, cable loss is not so important, ie dB per m, etc. It's most important to prevent ingress along the length of the feeder and shielded
Eric We are only interested in receive capability not transmit, so, cable loss is not so important, ie dB per m, etc. It's most important to prevent ingress along the length of the feeder and shielded
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David Cutter
· #7485
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Tips to improve LAA+ Performance?
That's interesting. Are cables otherwise identical, eg single screen, diameter, manufacturer? Chris has a good track record in using Cat 5(S?) cable which is excellent at keeping noise out. David G3UN
That's interesting. Are cables otherwise identical, eg single screen, diameter, manufacturer? Chris has a good track record in using Cat 5(S?) cable which is excellent at keeping noise out. David G3UN
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David Cutter
· #7483
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Tips to improve LAA+ Performance?
Hello Simon Sturdy looking loops and it looks like you've put a lot of effort in to them. I was wondering how these would compare to Chris's idea of bicycle rims. David G3UNA
Hello Simon Sturdy looking loops and it looks like you've put a lot of effort in to them. I was wondering how these would compare to Chris's idea of bicycle rims. David G3UNA
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David Cutter
· #7481
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Looking for UK source of low noise 5V DC supply
I would be tempted to use a discrete regulator off your 12V supply, with suitable heatsink David G3UNA
I would be tempted to use a discrete regulator off your 12V supply, with suitable heatsink David G3UNA
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David Cutter
· #7473
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Considering the active antenna for SWL (comments from forum members)
John End fed wire to loop with proper common mode treatment will be night and day, but don't just look for signal level comparison, the aim of the game is signal to noise ratio. The SW8 should easily
John End fed wire to loop with proper common mode treatment will be night and day, but don't just look for signal level comparison, the aim of the game is signal to noise ratio. The SW8 should easily
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David Cutter
· #7286
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Loop antenna removal
Tom Very sound. Please keep us posted on further developments. I have a friend in this situation and your method has given me some clarity and a way forward for him. David G3UNA
Tom Very sound. Please keep us posted on further developments. I have a friend in this situation and your method has given me some clarity and a way forward for him. David G3UNA
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David Cutter
· #7206
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Loop antenna removal
I agree with John's sentiments, we seem to live in a society of suspicion and litigation for the slightest thing someone might point at. Having said that, you need to establish that you are not transg
I agree with John's sentiments, we seem to live in a society of suspicion and litigation for the slightest thing someone might point at. Having said that, you need to establish that you are not transg
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David Cutter
· #7200
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CCW Inverted-U antenna
Thanks for the tip, Adrian. David G3UNA
Thanks for the tip, Adrian. David G3UNA
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David Cutter
· #7172
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CCW Inverted-U antenna
Yes, I did the same and it means learning 4NEC2 which I don't have time for right now. It would be easy if it were in EZNEC which I am familiar with. I assume the issue is the EZNEC doesn't model wire
Yes, I did the same and it means learning 4NEC2 which I don't have time for right now. It would be easy if it were in EZNEC which I am familiar with. I assume the issue is the EZNEC doesn't model wire
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David Cutter
· #7168
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My OFF TOPIC post earlier
I found it pertinent and funny. David G3UNA
I found it pertinent and funny. David G3UNA
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By
David Cutter
· #6955
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Hi Z Antenna Amplifiers
Yes, it's been pretty active for a few days now. I hope he does well out of it. David G3UNA
Yes, it's been pretty active for a few days now. I hope he does well out of it. David G3UNA
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By
David Cutter
· #6905
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HF Preselector Power
At that current I would be tempted to run a pack of AA cells for the ultimate quiet power supply. I doubt you will find a "modern" power supply as quiet. David G3UNA
At that current I would be tempted to run a pack of AA cells for the ultimate quiet power supply. I doubt you will find a "modern" power supply as quiet. David G3UNA
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David Cutter
· #6863
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My newest CCW Loop
It would be easy to compare if you had one receiver switched between 2 antenna inputs. For most purposes it's all about signal to noise ratio, so, the lower the background noise the better. The signal
It would be easy to compare if you had one receiver switched between 2 antenna inputs. For most purposes it's all about signal to noise ratio, so, the lower the background noise the better. The signal
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David Cutter
· #6776
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My newest CCW Loop
Hi Brent These look very instructive. Can you arrange for them both to have the same left hand scale, best would be dBm? 73 and Happy New Year David G3UNA
Hi Brent These look very instructive. Can you arrange for them both to have the same left hand scale, best would be dBm? 73 and Happy New Year David G3UNA
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David Cutter
· #6764
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SAQ VLF transmission on Christmas Eve
Hi Chris Can you put the audio onto your web site so we can hear for ourselves? David G3UNA
Hi Chris Can you put the audio onto your web site so we can hear for ourselves? David G3UNA
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David Cutter
· #6706
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Saying hi.
Look for TV antenna rotator: used to be common from USA/Japan David G3UNA
Look for TV antenna rotator: used to be common from USA/Japan David G3UNA
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David Cutter
· #6616
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Loop antenna amplifier upgraded
OK, John, thanks for the info, I see lots of ads for this loop. I've had several products from CCW and I don't think you will be disappointed David G3UNA
OK, John, thanks for the info, I see lots of ads for this loop. I've had several products from CCW and I don't think you will be disappointed David G3UNA
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David Cutter
· #6584
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Loop antenna amplifier upgraded
Hi John I might have missed something along the way and I'd like you to fill me in: I think you are talking about a transmitting loop marketed by Martin Lynch, of several that he advertises and are qu
Hi John I might have missed something along the way and I'd like you to fill me in: I think you are talking about a transmitting loop marketed by Martin Lynch, of several that he advertises and are qu
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David Cutter
· #6582
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