Re: Topband: Shared Apex Loop Array
CTU 2014 - Session 6 Part 1 - Low Band Receive Antenna Discussion Q - W3LPL | | | | | | | | | | | CTU 2014 - Session 6 Part 1 - Low Band Receive Antenna... | | | | View on www.youtube.com | Preview by Yahoo | | | | | hi all annyone ever did test this setup?How does it perform in reality? may someone test it ore coud see the difference to HI-Z ore Beverage Antennas? Anny Info vy welcome Best wishes Frank DL8YHR.DE Frank, Try this. There are also more videos on the subjectRegards,Jim/k2hn _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Shared Apex Loop Array
K9CT used one this year. He also has an 8 circle (not sure which one). KK9K -Original Message- From: Gary K9GS Sent: Tuesday, November 10, 2015 7:54 PM To: topband@contesting.com Subject: Re: Topband: Shared Apex Loop Array Does anyone know if there is another source available for this besides YouTube? The PowerPoint slides are unreadable except when they are zoomed in (briefly). On 11/10/2015 4:46 PM, Jim Murray via Topband wrote: CTU 2014 - Session 6 Part 1 - Low Band Receive Antenna Discussion Q - W3LPL | | | | | | | | | | | CTU 2014 - Session 6 Part 1 - Low Band Receive Antenna... | | | | View on www.youtube.com | Preview by Yahoo | | | | | hi all annyone ever did test this setup?How does it perform in reality? may someone test it ore coud see the difference to HI-Z ore Beverage Antennas? Anny Info vy welcome Best wishes Frank DL8YHR.DE Frank, Try this. There are also more videos on the subjectRegards,Jim/k2hn _ Topband Reflector Archives - http://www.contesting.com/_topband -- 73, Gary K9GS Greater Milwaukee DX Association: http://www.gmdxa.org Society of Midwest Contesters: http://www.w9smc.com CW Ops #1032 http://www.cwops.org _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: shared apex loop array
Here's the correct URL: http://www.contestuniversity.com/attachments/W3LPL_Receiving_Antennas_2014.pptx 73, Tony K4QE On Tue, Nov 10, 2015 at 9:26 PM, Jim Murray via Topband < topband@contesting.com> wrote: > Sri can't seem to get these links to work. This is listed on Google then > follow receiving antennas, etc. Last try- hopefully it works. > > W3LPL - Contest University > www.contestuniversity.com/.../W3LPL_Receiving_Antennas_2014.pptx >- >- > Receiving Antennas - or - What happened to the. Beverages at K3LR > and W3LPL? directive antennas for small lots; higher performance for larger > lots; very high ...Regards,jim/k2hn > _ > Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: shared apex loop array
Sri can't seem to get these links to work. This is listed on Google then follow receiving antennas, etc. Last try- hopefully it works. W3LPL - Contest University www.contestuniversity.com/.../W3LPL_Receiving_Antennas_2014.pptx - - Receiving Antennas - or - What happened to the. Beverages at K3LR and W3LPL? directive antennas for small lots; higher performance for larger lots; very high ...Regards,jim/k2hn _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: shared apex loop array
Thank you Tony! On 11/10/2015 8:35 PM, Anthony Scandurra wrote: Here's the correct URL: http://www.contestuniversity.com/attachments/W3LPL_Receiving_Antennas_2014.pptx 73, Tony K4QE On Tue, Nov 10, 2015 at 9:26 PM, Jim Murray via Topband < topband@contesting.com> wrote: Sri can't seem to get these links to work. This is listed on Google then follow receiving antennas, etc. Last try- hopefully it works. W3LPL - Contest University www.contestuniversity.com/.../W3LPL_Receiving_Antennas_2014.pptx - - Receiving Antennas - or - What happened to the. Beverages at K3LR and W3LPL? directive antennas for small lots; higher performance for larger lots; very high ...Regards,jim/k2hn _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband -- 73, Gary K9GS Greater Milwaukee DX Association: http://www.gmdxa.org Society of Midwest Contesters: http://www.w9smc.com CW Ops #1032 http://www.cwops.org _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Shared Apex Loop Array
I have used 4 bi-direction 760 foot Beverages for 5 years or so here in Michigan. I put up the AS SAL-30 a month ago and my experience with the has been very favorable. I can't do a direct A to B with the Beverages right now so I must reserve making any bold statements about the comparative performance as yet, but it definitely beats a full size 4-Square on 80M. Modeling indicates that if single band (160M only) performance is desired - it can be optimized even further from the broadband 'tuning' I am using at present. QEX has an article on this antenna, and it is republished on the Antenna Specialties website. Is is a two element crossfire vertically polarized array made from loops. Personally, if I were going to build one, I would spread the loops apart. I would make the loop centers as far apart as possible, not to exceed 1/4 wavelength on the highest band. The directivity should be very similar to a properly designed and functioning four square, although near field coupling in congested installations could make a larger element four square, or a larger array, more noisy. When I was fighting LORAIN on 160 and wanted to work Japan (for Asia), I built an open wire line coupled array of eight loops like this. The loops were 70 ft on centers. This, and a good noise pulse blanker, allowed me to work JA1HKP and JA7AO on 160 through 100 kW. My long array loop design was a offshoot of looking at an advertisement for a loop array sold by some commercial company for the military. If they could do it I could figure out how I could do it. My noise pulse blanker was a offshoot of a LORAIN blanker concept of a W6 published in the 1950's (I guess). I just used a different circuitry of my own style, and added a delay line so the blanking pulses appeared on the switch tube (I originally used a 6BE6, and later changes to those new devices called semiconductor diodes). The log-loop array allowed me to hear only one or two LORAIN signals, so blanking time when signals were blanked decreased. I probably spent 400 hours so I could work two JA stations. 73 Tom _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Shared Apex Loop Array
Is is a two element crossfire vertically polarized array made from loops. Personally, if I were going to build one, I would spread the loops apart. I would make the loop centers as far apart as possible, not to exceed 1/4 wavelength on the highest band. Let me expand a bit how it works. Because the SA array has such close spacing, the center vertical element wires cancel. They just vanish from any significant pattern effect. The result of the shared apex is the loops function as two short ground independent verticals that are phased. The axis null in a loop forms because all opposing sides carry 180 degree out-of-phase currents. If we push two small loops together, the vertical center wires carry mostly opposing currents, and go into transmission line mode. They are too close for any useful pattern control, so the loop changes mode. The reason I suggest wider spacing, if I was doing all that electrical hardware, is pushing the loops apart keeps the loop elements in loop mode, so far as pattern is concerned. This will add two nulls through the loop axis. Although the nulls are rather small area, any new null or additional null not in signal direction is a good null. The no free lunch rule is, as usual, in full force. We simplify by using one support and decrease length, and we lose other nice things. We have two short verticals phased, instead of what would be three or four with wider spacing. 73 Tom _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Shared Apex Loop Array
Tom, Good to hear you chime in on this topic - I listen very intently when the oracle of Barnesville speaks... I have been trying to learn more about the SAL array from the 4NEC2 models - as it seems to outperform anything else I have to listen with at present. The models show narrower forward directivity from the SAL than a 4-square - which seems to be confirmed by my subjective observations. Can this be explained by the very close spacing of the 'virtual' verticals as well? Transmission line mode (in the closely spaced vertical wires of the loops) to me implies equal and opposite currents and yet the antenna performance would seem to be based on currents out of phase - hence the delay line to combine/cancel them for directivity? Regardless, I am not sure if any sort of descriptive logical explanation will ever allow me to understand what is going on with this antenna but I am beginning to get comfortable with the modeling. The bigger question to me is; do you think the 4NEC2 model results faithfully represent what is going on with this antenna? I am wondering how an 8 circle array of these SAL antennas - fed 4 at a time in the classical broadside/endfire way, like individual verticals - would perform? (Maybe not use the amplifiers or check that they have identical phase delay?) I think the single support makes something like that mechanically feasible - not much different than top loaded verticals with 4 support wires/guy ropes. Bruce W8RA From: Tom W8JI w...@w8ji.com To: bruce whitney zuce...@yahoo.com; Carl Luetzelschwab carlluetzelsch...@gmail.com; topband@contesting.com Sent: Monday, February 10, 2014 1:36 PM Subject: Re: Topband: Shared Apex Loop Array Is is a two element crossfire vertically polarized array made from loops. Personally, if I were going to build one, I would spread the loops apart. I would make the loop centers as far apart as possible, not to exceed 1/4 wavelength on the highest band. Let me expand a bit how it works. Because the SA array has such close spacing, the center vertical element wires cancel. They just vanish from any significant pattern effect. The result of the shared apex is the loops function as two short ground independent verticals that are phased. The axis null in a loop forms because all opposing sides carry 180 degree out-of-phase currents. If we push two small loops together, the vertical center wires carry mostly opposing currents, and go into transmission line mode. They are too close for any useful pattern control, so the loop changes mode. The reason I suggest wider spacing, if I was doing all that electrical hardware, is pushing the loops apart keeps the loop elements in loop mode, so far as pattern is concerned. This will add two nulls through the loop axis. Although the nulls are rather small area, any new null or additional null not in signal direction is a good null. The no free lunch rule is, as usual, in full force. We simplify by using one support and decrease length, and we lose other nice things. We have two short verticals phased, instead of what would be three or four with wider spacing. 73 Tom _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Shared Apex Loop Array
Regardless, I am not sure if any sort of descriptive logical explanation will ever allow me to understand what is going on with this antenna but I am beginning to get comfortable with the modeling. The bigger question to me is; do you think the 4NEC2 model results faithfully represent what is going on with this antenna? What are the dimensions of your antenna? Just one loop will work, if they are identical, and the spacing to the mirror. _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Shared Apex Loop Array
Bruce, I have considerable experience with loop arrays; whilst they are good performers in an electrically noisy environment, they suffer from poor directivity at higher angles. This can also be seen with EZNEC models by looking at the AZ Plot with an Elevation angle of say 40 degrees. The directivity and RDF is much better with a pair Phased Flags for example. Other issues, Tom has mentioned a too close element spacing which will lower the array gain. Also there is the issue of array stability i.e. a minor phase or amplitude error will completely screw up the pattern. 73 Andrew G8LUG _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Shared Apex Loop Array
The antenna geometry indicates that it should perform similar to a Waller Flag *under the same conditions*. The Waller flag though, (as Tom has alluded to) has more spacing between the loops and is usually mounted higher in the air. Height above ground is important. Raise your model up to 100 ft. Also, since the currents in the center vertical wires are out of phase, you should be able to eliminate three of those wires. Tie all the wires together at the top and at the bottom, and use just one wire from top to bottom. Jim - KR9U -Original Message- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Andy Ikin Sent: Monday, February 10, 2014 4:12 PM To: bruce whitney; Topband Reflector Subject: Re: Topband: Shared Apex Loop Array Bruce, I have considerable experience with loop arrays; whilst they are good performers in an electrically noisy environment, they suffer from poor directivity at higher angles. This can also be seen with EZNEC models by looking at the AZ Plot with an Elevation angle of say 40 degrees. The directivity and RDF is much better with a pair Phased Flags for example. Other issues, Tom has mentioned a too close element spacing which will lower the array gain. Also there is the issue of array stability i.e. a minor phase or amplitude error will completely screw up the pattern. 73 Andrew G8LUG _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Shared Apex Loop Array
Hi Jim The antenna geometry indicates that it should perform similar to a Waller Flag *under the same conditions*. The perform under same conditions is expected, however the WF RDF is between 11.5db to 12 db. How that compares with a 8.5db RDF antenna? I would say two antennas with the same RDF should perform similar. The WF is a different antenna, it's a rotatable pair of loaded loops. Each loop is open and loaded with a resistor. Regards JC N4IS _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Shared Apex Loop Array
since the currents in the center vertical wires are out of phase, you should be able to eliminate three of those wires. Tie all the wires together at the top and at the bottom, and use just one wire from top to bottom. Jim - KR9U That is similar to an antenna I tried in 2002 from the hardcoredx website. Mine was a 3/4-inch diam. aluminum pole in the center with 6 wires (3 opposing pairs) all attached to the top and bottom of the pole ends. I could never get the phasing system to work correctly, abandoned the project, and reinstalled the K9AY. I've wanted to revisit it however since reading the phasing setup used in the shared apex loop articles. Steve KK7UV --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: Shared Apex Loop Array
I recently put reviews about the SAL-20 and SAL-30 on eham.net if anyone is interested. Two on air demonstrations of the F/B are on YouTube. Please refer to: http://www.youtube.com/watch?v=tVi5xQIXnXU (160m) and http://www.youtube.com/watch?v=F_S7JwfEpQ8 (80m). -- David J Rodman MD Assistant Clinical Professor Department of Ophthalmology SUNY/Buffalo Office 716-857-8654 _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Shared Apex Loop Array
See N3OC's review of the Shared Apex Loop Array in the February PVRC Newsletter, page 5 http://pvrc.org/Newsletters/feb14.pdf Its competitive with other small receiving arrays and single Beverages and its not surprising that much larger arrays of phased Beverages and phased verticals offer superior RDF performance. 73 Frank W3LPL - Original Message - From: D Rodman MD rod...@buffalo.edu To: topband@contesting.com Sent: Sunday, February 9, 2014 5:19:29 PM Subject: Topband: Shared Apex Loop Array I recently put reviews about the SAL-20 and SAL-30 on eham.net if anyone is interested. Two on air demonstrations of the F/B are on YouTube. Please refer to: http://www.youtube.com/watch?v=tVi5xQIXnXU (160m) and http://www.youtube.com/watch?v=F_S7JwfEpQ8 (80m). -- David J Rodman MD Assistant Clinical Professor Department of Ophthalmology SUNY/Buffalo Office 716-857-8654 _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Shared Apex Loop Array
Is the SAL-30 available piecemeal? I have plenty of wire, coax, enclosures, support tubing, etc, and would just need the proprietary controller Since I already have 5 two wire 500-750' Beverages for 10 directions the high cost of a complete package is not economically justifiable for me just to see if the SAL-30 makes a difference. I may be a dinosaur but I still enjoy the mental stimulation of building things. Carl KM1H - Original Message - From: donov...@starpower.net To: topband@contesting.com Sent: Sunday, February 09, 2014 1:13 PM Subject: Re: Topband: Shared Apex Loop Array See N3OC's review of the Shared Apex Loop Array in the February PVRC Newsletter, page 5 http://pvrc.org/Newsletters/feb14.pdf Its competitive with other small receiving arrays and single Beverages and its not surprising that much larger arrays of phased Beverages and phased verticals offer superior RDF performance. 73 Frank W3LPL - Original Message - From: D Rodman MD rod...@buffalo.edu To: topband@contesting.com Sent: Sunday, February 9, 2014 5:19:29 PM Subject: Topband: Shared Apex Loop Array I recently put reviews about the SAL-20 and SAL-30 on eham.net if anyone is interested. Two on air demonstrations of the F/B are on YouTube. Please refer to: http://www.youtube.com/watch?v=tVi5xQIXnXU (160m) and http://www.youtube.com/watch?v=F_S7JwfEpQ8 (80m). -- David J Rodman MD Assistant Clinical Professor Department of Ophthalmology SUNY/Buffalo Office 716-857-8654 _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband - No virus found in this message. Checked by AVG - www.avg.com Version: 2014.0.4259 / Virus Database: 3697/7077 - Release Date: 02/09/14 _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Shared Apex Loop Array
I’m curious if it’s really any different than a two loop K9AY on one support. Cecil K5DL From: Carl Sent: February 9, 2014 1:36 PM To: donov...@starpower.net; topband@contesting.com Subject: Re: Topband: Shared Apex Loop Array Is the SAL-30 available piecemeal? I have plenty of wire, coax, enclosures, support tubing, etc, and would just need the proprietary controller Since I already have 5 two wire 500-750' Beverages for 10 directions the high cost of a complete package is not economically justifiable for me just to see if the SAL-30 makes a difference. I may be a dinosaur but I still enjoy the mental stimulation of building things. Carl KM1H - Original Message - From: donov...@starpower.net To: topband@contesting.com Sent: Sunday, February 09, 2014 1:13 PM Subject: Re: Topband: Shared Apex Loop Array See N3OC's review of the Shared Apex Loop Array in the February PVRC Newsletter, page 5 http://pvrc.org/Newsletters/feb14.pdf Its competitive with other small receiving arrays and single Beverages and its not surprising that much larger arrays of phased Beverages and phased verticals offer superior RDF performance. 73 Frank W3LPL - Original Message - From: D Rodman MD rod...@buffalo.edu To: topband@contesting.com Sent: Sunday, February 9, 2014 5:19:29 PM Subject: Topband: Shared Apex Loop Array I recently put reviews about the SAL-20 and SAL-30 on eham.net if anyone is interested. Two on air demonstrations of the F/B are on YouTube. Please refer to: http://www.youtube.com/watch?v=tVi5xQIXnXU (160m) and http://www.youtube.com/watch?v=F_S7JwfEpQ8 (80m). -- David J Rodman MD Assistant Clinical Professor Department of Ophthalmology SUNY/Buffalo Office 716-857-8654 _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband - No virus found in this message. Checked by AVG - www.avg.com Version: 2014.0.4259 / Virus Database: 3697/7077 - Release Date: 02/09/14 _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Shared Apex Loop Array
It seems to me as a user of many types of loops of all sizes in a noisy residential area, that there is still something beyond Lower take off angle from the long beverages vs these loops, and perhaps even beyond better s/n ratio which makes beverages better. OR maybe it's just the fact that those with long beverages are naturally in more open areas as the actual RDF, gain etc isn't that much greater from a terminated loop to a beverage to warrant the reception differences I hear on my station vs those in the general area with the beverages. Can it be the capture area of the longer antenna is a key differentiator. ?? Sent from my iPhone On Feb 9, 2014, at 1:13 PM, donov...@starpower.net wrote: See N3OC's review of the Shared Apex Loop Array in the February PVRC Newsletter, page 5 http://pvrc.org/Newsletters/feb14.pdf Its competitive with other small receiving arrays and single Beverages and its not surprising that much larger arrays of phased Beverages and phased verticals offer superior RDF performance. 73 Frank W3LPL - Original Message - From: D Rodman MD rod...@buffalo.edu To: topband@contesting.com Sent: Sunday, February 9, 2014 5:19:29 PM Subject: Topband: Shared Apex Loop Array I recently put reviews about the SAL-20 and SAL-30 on eham.net if anyone is interested. Two on air demonstrations of the F/B are on YouTube. Please refer to: http://www.youtube.com/watch?v=tVi5xQIXnXU (160m) and http://www.youtube.com/watch?v=F_S7JwfEpQ8 (80m). -- David J Rodman MD Assistant Clinical Professor Department of Ophthalmology SUNY/Buffalo Office 716-857-8654 _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Shared Apex Loop Array
Carl, You can check out the original article in the Oct. 2012 issue of QST. I believe there was a QEX article also around the same time. Russ, N3CO Carl k...@jeremy.mv.com wrote: Is the SAL-30 available piecemeal? I have plenty of wire, coax, enclosures, support tubing, etc, and would just need the proprietary controller Since I already have 5 two wire 500-750' Beverages for 10 directions the high cost of a complete package is not economically justifiable for me just to see if the SAL-30 makes a difference. I may be a dinosaur but I still enjoy the mental stimulation of building things. Carl KM1H - Original Message - From: donov...@starpower.net To: topband@contesting.com Sent: Sunday, February 09, 2014 1:13 PM Subject: Re: Topband: Shared Apex Loop Array See N3OC's review of the Shared Apex Loop Array in the February PVRC Newsletter, page 5 http://pvrc.org/Newsletters/feb14.pdf Its competitive with other small receiving arrays and single Beverages and its not surprising that much larger arrays of phased Beverages and phased verticals offer superior RDF performance. 73 Frank W3LPL - Original Message - From: D Rodman MD rod...@buffalo.edu To: topband@contesting.com Sent: Sunday, February 9, 2014 5:19:29 PM Subject: Topband: Shared Apex Loop Array I recently put reviews about the SAL-20 and SAL-30 on eham.net if anyone is interested. Two on air demonstrations of the F/B are on YouTube. Please refer to: http://www.youtube.com/watch?v=tVi5xQIXnXU (160m) and http://www.youtube.com/watch?v=F_S7JwfEpQ8 (80m). -- David J Rodman MD Assistant Clinical Professor Department of Ophthalmology SUNY/Buffalo Office 716-857-8654 _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband - No virus found in this message. Checked by AVG - www.avg.com Version: 2014.0.4259 / Virus Database: 3697/7077 - Release Date: 02/09/14 _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: Shared Apex Loop Array
Recently I came across an interesting advertisement for the Shared Apex Loop Array, SALA, and thought I would poll the Top Banders to see if they have used one and get your opinions before plunging into another project. Over the years I have built and tried the K9AY, Flag. Pennant, DHDL, Beverages and others. Some still exist here at the QTH but many of the others have come down or were reworked as other designs came along. The SALA kooks very interesting and might even work here in the Arizona desert. This antenna looks good for HF and LF operation. Hopefully the FCC will open up some of the LF spectrum and this certainly looks like a good candidate for both, How about it “Top Band Home brewers” Have any of you tried this NEW design? _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: Shared Apex Loop Array
Terry W7KW, Yesterday I posted a message here about the Shared Apex Loop Array. N3OC's review of it appears in the February PVRC newsletter. My Product Review of it will appear in the April QST. My experience with it has been extremely favorable on 160m, 80m and 40m as I cannot put up multiple long Beverages. Carl K9LA _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Shared Apex Loop Array
Carl, I have used 4 bi-direction 760 foot Beverages for 5 years or so here in Michigan. I put up the AS SAL-30 a month ago and my experience with the has been very favorable. I can't do a direct A to B with the Beverages right now so I must reserve making any bold statements about the comparative performance as yet, but it definitely beats a full size 4-Square on 80M. Modeling indicates that if single band (160M only) performance is desired - it can be optimized even further from the broadband 'tuning' I am using at present. Bruce W8RA From: Carl Luetzelschwab carlluetzelsch...@gmail.com To: topband@contesting.com Sent: Saturday, February 8, 2014 4:12 PM Subject: Topband: Shared Apex Loop Array Terry W7KW, Yesterday I posted a message here about the Shared Apex Loop Array. N3OC's review of it appears in the February PVRC newsletter. My Product Review of it will appear in the April QST. My experience with it has been extremely favorable on 160m, 80m and 40m as I cannot put up multiple long Beverages. Carl K9LA _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: Shared Apex Loop Array
I did a search and haven't found any previous comments on this reflector about the Shared Apex Loop Array. Has anyone tried it yet? -- 73, Tony K4QE Elecraft K3 #6478 + P3 #2058 + KPA500 #844 + PR6 + K144XV ___ Topband reflector - topband@contesting.com
