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Receiving Loop Antenna Question
If i were to construct a square receiving loop antenna for the am bcb that
is 24" or more per side..... how important would the guage of the wire be & also solid versus stranded wire? Antenna would be used indoors. |
#2
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Receiving Loop Antenna Question
"Spin" wrote in message ... If i were to construct a square receiving loop antenna for the am bcb that is 24" or more per side..... how important would the guage of the wire be & also solid versus stranded wire? Antenna would be used indoors. Hi Spin Have you seen this site? http://www.mindspring.com/~loop_antenna/ Jerry KD6JDJ |
#3
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Receiving Loop Antenna Question
Spin wrote:
If i were to construct a square receiving loop antenna for the am bcb that is 24" or more per side..... how important would the guage of the wire be & also solid versus stranded wire? Antenna would be used indoors. Any wire you can comfortably work with is fine. |
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Receiving Loop Antenna Question
On Jan 21, 9:57*pm, "Spin" wrote:
If i were to construct a square receiving loop antenna for the am bcb that is 24" or more per side..... how important would the guage of the wire be & also solid versus stranded wire? Antenna would be used indoors. Doesn't matter much. Maybe a slight difference in Q with thin vs fat wire, but overall no big deal. I've got loops made from thin copper motor wire, and also one from insulated #14 gauge stranded house wire. They all work. From a mechanical standpoint I think a diamond is easier to deal with.. Here is one of my favorite designs for a cheap simple PVC loop. You can slap one together pretty fast. Kind of like PVC tinker toys.. :/ You do have to drill the holes, but that's easy. http://home.comcast.net/~nm5k/loop5.jpg |
#6
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Receiving Loop Antenna Question
Ian Jackson wrote:
In message , writes On Jan 21, 9:57 pm, "Spin" wrote: If i were to construct a square receiving loop antenna for the am bcb that is 24" or more per side..... how important would the guage of the wire be & also solid versus stranded wire? Antenna would be used indoors. Doesn't matter much. Maybe a slight difference in Q with thin vs fat wire, but overall no big deal. I've got loops made from thin copper motor wire, and also one from insulated #14 gauge stranded house wire. They all work. From a mechanical standpoint I think a diamond is easier to deal with.. Here is one of my favorite designs for a cheap simple PVC loop. You can slap one together pretty fast. Kind of like PVC tinker toys.. :/ You do have to drill the holes, but that's easy. http://home.comcast.net/~nm5k/loop5.jpg What about ribbon cable? I've got a fair length of ribbon cable (something like 25 wires - the sort used in PCs to connect hard drives and the like) put away for a rainy-day loop antenna project. While I could make one large loop using all 25 wires for the really low frequencies, I'll almost certainly cut it up and make several smaller loops with fewer wires for the higher frequencies. Or put some taps on it,say every 2 turns? each one connected to a pole of a large 12 position rotary switch.. then you can select a small loop,or a really large one,for the low stuff. :-) Tuneable! |
#7
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Receiving Loop Antenna Question
Ian Jackson wrote:
In message , writes On Jan 21, 9:57 pm, "Spin" wrote: If i were to construct a square receiving loop antenna for the am bcb that is 24" or more per side..... how important would the guage of the wire be & also solid versus stranded wire? Antenna would be used indoors. Doesn't matter much. Maybe a slight difference in Q with thin vs fat wire, but overall no big deal. I've got loops made from thin copper motor wire, and also one from insulated #14 gauge stranded house wire. They all work. From a mechanical standpoint I think a diamond is easier to deal with.. Here is one of my favorite designs for a cheap simple PVC loop. You can slap one together pretty fast. Kind of like PVC tinker toys.. :/ You do have to drill the holes, but that's easy. http://home.comcast.net/~nm5k/loop5.jpg What about ribbon cable? I've got a fair length of ribbon cable (something like 25 wires - the sort used in PCs to connect hard drives and the like) put away for a rainy-day loop antenna project. While I could make one large loop using all 25 wires for the really low frequencies, I'll almost certainly cut it up and make several smaller loops with fewer wires for the higher frequencies. Stick with a single wire and relatively few loops. More wire won't make the loop bigger, just harder to tune. |
#8
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Receiving Loop Antenna Question
On Fri, 23 Jan 2009 13:57:40 +0000, dave wrote:
Ian Jackson wrote: What about ribbon cable? I've got a fair length of ribbon cable (something like 25 wires - the sort used in PCs to connect hard drives and the like) put away for a rainy-day loop antenna project. While I could make one large loop using all 25 wires for the really low frequencies, I'll almost certainly cut it up and make several smaller loops with fewer wires for the higher frequencies. Stick with a single wire and relatively few loops. More wire won't make the loop bigger, just harder to tune. I don't think he meant to connect all those wires in parallel. But, it would be a little tedious to connect each wire at one end to its neighbor at the other end (of the loop), and _not_ create an ugly bird's nest at the 'joint'. Jonesy -- Marvin L Jones | jonz | W3DHJ | linux 38.24N 104.55W | @ config.com | Jonesy | OS/2 * Killfiling google & XXXXbanter.com: jonz.net/ng.htm |
#9
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Receiving Loop Antenna Question
Allodoxaphobia wrote:
I don't think he meant to connect all those wires in parallel. I thought he was talking about a tapped coil with the unused parts floating. Might result in a new Tesla coil design. :-) -- 73, Cecil http://www.w5dxp.com |
#10
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Receiving Loop Antenna Question
"Allodoxaphobia" wrote in message ... On Fri, 23 Jan 2009 13:57:40 +0000, dave wrote: Ian Jackson wrote: What about ribbon cable? I've got a fair length of ribbon cable (something like 25 wires - the sort used in PCs to connect hard drives and the like) put away for a rainy-day loop antenna project. While I could make one large loop using all 25 wires for the really low frequencies, I'll almost certainly cut it up and make several smaller loops with fewer wires for the higher frequencies. Stick with a single wire and relatively few loops. More wire won't make the loop bigger, just harder to tune. I don't think he meant to connect all those wires in parallel. But, it would be a little tedious to connect each wire at one end to its neighbor at the other end (of the loop), and _not_ create an ugly bird's nest at the 'joint'. Jonesy Hi Jonesy For what Its Worth, I tried making a big AM reception loop using some big ribbon cable, and it didnt work. The cable was/is color coded so it was easy to connect the ends so the input to output is a series connection of the wires. The antenna didnt work. I assummed it was due to excessive 'distributed capacity' between windings. I had no interest in researching the reason for ribbon cable use for AM loop antennas. Besides, it got Very difficult to assemble the loop onto the mounting frame and have it look presentable. " Stick with a single wire and relatively few loops. More wire won't make the loop bigger, just harder to tune." Jerry KD6JDJ |
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