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Active loop antenna
Hi,
On minicircuits.com catalog,there are some interesting mololithic Rf amplifier ERA/MAR series offering good IP3.I would like to know if you have some schematich diagram to homebrew an active broadband loop antenna from 100 Khz to 30 Mhz !! Best regards Franco Italy.- |
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Re: Is anybody there....
larry allen
Its hovering around zero degree C here in Toronto, Ontario
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Larry ve3fxq ----- Original Message -----
From: "Rob Moore" <rmoore5@...> To: <loopantennas@...> Sent: Tuesday, February 27, 2007 5:37 PM Subject: [loopantennas] Re: Is anybody there.... Rub it in! It's about 55 degrees here and rainy in San Jose. --- In loopantennas@..., Steve Baker <mcqueen_34@...> wrote: ____________________________________________________________________________________ Do you Yahoo!? |
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Re: Super Loop 40/80m
willmcray
Thanks for the input. I don't have the lot size or supports to get
the loop any higher then what I have which is 30 ft at the highest point. The apex is pointed down and at about 6 foot off the ground. The antenna works great positioned as is, just courious what I would gain by going horiziontal with it at say 25 feet. From what I understand it is a bit directional moounted verticial. I guess all I can do is try. Every instalation is different and I need to try and see what works best for my location. 73, Will W6AAV --- In loopantennas@..., Jim Dunstan <jdunstan@...> wrote: 40yahoogroups.com>loopantennas@...> on 10-Sent: Tuesday, February 27, 2007 2:52 PM it20. I have it vertically polorized. I have heard that positioning withhorziontal will provide better performance. Has anyone out here 80m,experience with this antenna. I thought of building a skywire for Ibut I can't support 278 feet of wire. Currently I have 218 ft and arrangedcan work with that as the very most. in one way or another in a loop arrangement .... in early daysthey were generally arranged in a vertical configuration while more recentlythe horizontal arrangement is popular. If designed to be naturallyresonant at a particular band they are 1 wavelength in circumference and canbe fed with a coax feed line. If not resonant, or more than 1 wavelengththey are generally used multiband. In this case they are fed with balancedopen wire feed line and tuned with an antenna tuner. Performance isgenerally unpredictable and mostly a necdotal.the center at least 1/2 wavelength above ground is a 'hot' performer. Ihave had mixed results with the 'lots of wire' horizontal 'Sky Wire' |
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Re: Is anybody there....
Rob Moore
Rub it in! It's about 55 degrees here and rainy in San Jose.
--- In loopantennas@..., Steve Baker <mcqueen_34@...> wrote: ____________________________________________________________________________________ Do you Yahoo!? |
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Re: Is anybody there....
Steve Baker
Sorry wasn't paying attention. I was out laying by the
pool. 75 degrees here in Phoenix! Steve B. Well I'm glad the group is stil active! It sounds ____________________________________________________________________________________ Do you Yahoo!? Everyone is raving about the all-new Yahoo! Mail beta. |
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Re: Super Loop 40/80m
Jim Dunstan
At 06:15 AM 2/28/2007 +1300, you wrote:
What is a sky wire ? Hi, 'Sky Wire' is a euphemism for an antenna system with lots of wire arranged in one way or another in a loop arrangement .... in early days they were generally arranged in a vertical configuration while more recently the horizontal arrangement is popular. If designed to be naturally resonant at a particular band they are 1 wavelength in circumference and can be fed with a coax feed line. If not resonant, or more than 1 wavelength they are generally used multiband. In this case they are fed with balanced open wire feed line and tuned with an antenna tuner. Performance is generally unpredictable and mostly a necdotal. I know that a 1 wavelength loop that is vertically oriented with the center at least 1/2 wavelength above ground is a 'hot' performer. I have had mixed results with the 'lots of wire' horizontal 'Sky Wire' approach. Height above ground beats mult-wavelengths every time. Jim |
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Re: Is anybody there....
Rob Moore
Well I'm glad the group is still active! It sounds like everyone is
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playing with different things or freezing in the winter weather! I'm doing that too. Right now I'm trying to see how well I can pick up the NOAA polar orbiter satellites with my PCR-1000 and decode APT's which are sent down. I only have a discone up at the moment which is a lousy antenna for this application, not being circularly polarized, but I thought if I could receive anything, I'd go the next step and put up a turnstile or QFH antenna and a decent 137 Mhz preamp. Unfortunately, this is off-topic for this group but what the heck. Rob --- In loopantennas@..., Richards <jruing@...> wrote:
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Re: Super Loop 40/80m
Keith Browning
What is a sky wire ?
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278 feet is around a full wavelength Keith ----- Original Message -----
From: "willmcray" <w6aav@...> To: <loopantennas@...> Sent: Tuesday, February 27, 2007 2:52 PM Subject: [loopantennas] Super Loop 40/80m I just built a super loop antenna for 80/40. It also works well on 10- 20. I have it vertically polorized. I have heard that positioning it horziontal will provide better performance. Has anyone out here with experience with this antenna. I thought of building a skywire for 80m, but I can't support 278 feet of wire. Currently I have 218 ft and I can work with that as the very most. Any help would be helpful. Will W6AAV If you've got links, post them in the Links section! Post files here. If the file comes from a website, please put it in the Links rather than uploading the file. You can now view images at higher resolution in Photos. Upload JPG and GIF into Photos. Please convert BMP or TIF to JPG or GIF before uploading. And please trim all this when replying! Yahoo! Groups Links __________ NOD32 2082 (20070226) Information __________ This message was checked by NOD32 antivirus system. |
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Re: Is anybody there....
Richards
I am not here at all.....
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... but thanks for asking... //////////////// JHR /////////////// ======================================== John Popelish wrote: Rob Moore wrote:Helloo...... HHEELLLLOOOoooooooo..... |
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New Loop Project
jr_dakota
I just got a Lego Mindstorms NXT robotics kit with a very cool 32 bit
ARM7 controller that's been open sourced, hardware and software ... It supports Bluetooth, USB, and I2C communications ... So one of the projects I'm already starting to work on is an automatic loop tuner for portable loops .... basically I'm making a SWR bridge for input (This is the trickiest part but shouldn't be too bad using the NXT Toolkit for National Instruments Labview which the provided programmibng software is based on) and using one of the motors to turn the tuning cap .... Turning the tuning on and off will be done on a laptop, PDA or desktop using Bluetooth allowing me to put the loop away from the operating position and still be able to autotune it So it will work like this ... I switch the antenna over from the reciever/transciever to my AMQRP Antenna Analyst which will feed in the desired frequency, then I enable the autotuner via Bluetooth, let it tune and send back a signal when it's successful, then I turn off the autotuner, switch the antenna back to the reciever and I'm ready to rock .... Once this works out successfully then I'm going to try making an autotuner using a pair of variable caps and a roller inductor controlled directly by the NXT JR |
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Re: Is anybody there....
John Popelish
Rob Moore wrote:
Helloo...... HHEELLLLOOOoooooooo.....Still here. I just got lost on a major tangent to make a magnetometer. That and collect and restore a batch of old oscilloscopes off eBay. |
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Re: Is anybody there....
also still here, like John P on a bit of a tangent
Paul Birke Guelph ON |
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Re: Is anybody there.... (thought I heard an echo)
Steve Ratzlaff
(I can't hear you, I thought I heard an echo from somewhere---what was that you said?)
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My ALA100 with 100' vertical loop is working fine, LF-HF--nothing to comment on, there. Still winter here. :) Steve NE Oregon ----- Original Message -----
From: "Rob Moore" <rmoore5@...> To: <loopantennas@...> Sent: Monday, February 26, 2007 5:11 PM Subject: [loopantennas] Is anybody there.... Helloo...... HHEELLLLOOOoooooooo..... |
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Super Loop 40/80m
willmcray
I just built a super loop antenna for 80/40. It also works well on 10-
20. I have it vertically polorized. I have heard that positioning it horziontal will provide better performance. Has anyone out here with experience with this antenna. I thought of building a skywire for 80m, but I can't support 278 feet of wire. Currently I have 218 ft and I can work with that as the very most. Any help would be helpful. Will W6AAV |
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Re: AOR LA350 Loop Antenna
Fraser
Hi Andrew,
I had this problem when selling a Lowe PR-150. I had people saying they would outbid all others. I decided the fairest option was to set a price and offer the unit to the first person who contacted me. He was happy to pay the price and I was happy to sell so it seemed fair. Alternatively you could put it on eB*y Fraser (an interested party) --- In loopantennas@..., "Andrew Lincoln" <andrew.lincoln2@...> wrote: at the moment there are 3 people interested, how can I fairly decide which one to sell it to, any suggestions ? posting this reply here.Loop Antenna have a PayPal Account, if not it is easy to register andit's free. Web addressHopefully this won't cost much.refusal on |
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Re: AOR LA350 Loop Antenna
Hello
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To those that are interested in buying the AOL LA350 Loop Antenna, at the moment there are 3 people interested, how can I fairly decide which one to sell it to, any suggestions ? Thanks Andrew ----- Original Message -----
From: Fraser To: loopantennas@... Sent: Wednesday, February 14, 2007 11:42 AM Subject: [loopantennas] Re: AOR LA350 Loop Antenna Hi Andrew, I tried sendoin a PM but it failed so sorry to the Group for posting this reply here. I have a PayPal account and no problen with postage costs. I live in Milton Keynes. Fraser --- In loopantennas@..., "Andrew Lincoln" <andrew.lincoln2@...> wrote: > > Hello > > Do you and the other people interested in buying the AOR LA350 Loop Antenna have a PayPal Account, if not it is easy to register and it's free. Web address > www.paypal.com > > One other thing postage would be extra and if required can be registered post or recorded delivery I think it's called. Hopefully this won't cost much. > Where do you live, I live in Letchworth Hertfordshire. > > Thanks > > Andrew. > ----- Original Message ----- > From: Fraser > To: loopantennas@... > Sent: Tuesday, February 13, 2007 11:06 PM > Subject: [loopantennas] Re: AOR LA350 Loop Antenna > > > > Hi Andrew, > > If you do decide to sell, I should be grateful for first refusal on > it. > > Cheers > > Fraser > > --- In loopantennas@..., "aandrewb2001" > <andrew.lincoln2@> wrote: > > > > Hello all > > > > I have a AOR LA350 Loop Antenna that I might be selling. > > It is in mint condition, not sure if I have still got the manual or > not > > but have got the box. > > Comes with two loops and power adapter. > > I would like ?70.00 for it if I decide to sell, is that reasonable? > > > > Thanks > > > > Andrew. > > > > > > > > [Non-text portions of this message have been removed] > [Non-text portions of this message have been removed] |
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Re: AOR LA350 Loop Antenna
Marc
Andrew Lincoln schreef:
Hello Throw them in a river. The right guy is the one that drowns. Humor from the middle ages ... Marc |
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Re: AOR LA350 Loop Antenna
Robert Meuser
I am also interested and have a PayPal account. Please add me to the list. How much are you asking?
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R Andrew Lincoln wrote: Hello |
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Re: AOR LA350 Loop Antenna
Hello
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To those that are interested in buying the AOL LA350 Loop Antenna, at the moment there are 3 people interested, how can I fairly decide which one to sell it to, any suggestions ? Thanks Andrew. ----- Original Message -----
From: Fraser To: loopantennas@... Sent: Wednesday, February 14, 2007 11:42 AM Subject: [loopantennas] Re: AOR LA350 Loop Antenna Hi Andrew, I tried sendoin a PM but it failed so sorry to the Group for posting this reply here. I have a PayPal account and no problen with postage costs. I live in Milton Keynes. Fraser --- In loopantennas@..., "Andrew Lincoln" <andrew.lincoln2@...> wrote: > > Hello > > Do you and the other people interested in buying the AOR LA350 Loop Antenna have a PayPal Account, if not it is easy to register and it's free. Web address > www.paypal.com > > One other thing postage would be extra and if required can be registered post or recorded delivery I think it's called. Hopefully this won't cost much. > Where do you live, I live in Letchworth Hertfordshire. > > Thanks > > Andrew. > ----- Original Message ----- > From: Fraser > To: loopantennas@... > Sent: Tuesday, February 13, 2007 11:06 PM > Subject: [loopantennas] Re: AOR LA350 Loop Antenna > > > > Hi Andrew, > > If you do decide to sell, I should be grateful for first refusal on > it. > > Cheers > > Fraser > > --- In loopantennas@..., "aandrewb2001" > <andrew.lincoln2@> wrote: > > > > Hello all > > > > I have a AOR LA350 Loop Antenna that I might be selling. > > It is in mint condition, not sure if I have still got the manual or > not > > but have got the box. > > Comes with two loops and power adapter. > > I would like ?70.00 for it if I decide to sell, is that reasonable? > > > > Thanks > > > > Andrew. > > > > > > > > [Non-text portions of this message have been removed] > [Non-text portions of this message have been removed] |
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