Re: Topband: Rx splinter
In the professional / commercial world a receiver multicoupler is used to connect a number of receivers to one antenna. RegardsAdrian vk2wf Sent from my SAMSUNG Galaxy S7 on the Telstra Mobile Network Original message From: WW3S Date: 2/2/19 7:50 am (GMT+10:00) To: topband@contesting.com Subject: Topband: Rx splinter What’s the best way to split one rx antenna between 2 transceivers? Sent from my iPad _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
Re: Topband: Rather use N-type (was Re: The answer to PL-259
Hi allIn my past life I used to service Hagenuk ATUs for the navy. Internally a BNC connector was used for main feed. It was a nominal 1kw device but it was pressurized to 14psi with nitrogen. 73Adrian vk2wf Sent from my SAMSUNG Galaxy S7 on the Telstra Mobile Network Original message From: "Richard (Rick) Karlquist" Date: 8/12/18 1:22 pm (GMT+10:00) To: k...@k3lr.com, 'Mike Waters' , 'Frank Donovan' , 'topband' , 'Steve Maki' Subject: Re: Topband: Rather use N-type (was Re: The answer to PL-259 On 12/7/2018 6:07 PM, Tim Duffy wrote: > > W6NL asked me this question - would you run 1500 watts with BNC connectors? > > Tim K3LR Actually, I have gotten away with BNC connectors on 160 meters at 1500W for decades. YMMV! 73 Rick N6RK _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
Re: Topband: Inv L in Tree
HiMy vertical is fed with 60m of underground hardline coax to put it as far in the open my property allows. I have been removing all the smaller trees and undergrowth continually. Unless conditions are poor getting RBN pings in the US or Canada happens every night. The ARRL antenna handbook is right on this issue.73Adrian vk2wf Sent from my SAMSUNG Galaxy S7 on the Telstra Mobile Network Original message From: vk3io Date: 4/10/18 9:56 pm (GMT+10:00) To: Brian Campbell , topband@contesting.com Subject: Re: Topband: Inv L in Tree Hi Brian and others. Brian should have added with his comment, that he has made numerous qso's to VK (that is with me and other VK's) with his "poor antenna" on top band overs the past years and when and if he can move the wire away from the tree trunk, then he will no doubt make many more qso's. What a difference one S point can make or even a half an S point, when you move the wire away from the tree, by 2 or 3 feet, if possible. When I consider the number of dx qso's I "almost made" over the past 30 years or so, on Top Band and what I could have worked, if only for one S point, on TX and or RX. If only I had the drive or time to make such a small improvement to my antenna system. Cheers from Ron, vk3io. On 04-Oct-18 9:22 PM, Brian Campbell wrote: > Ed, Gary and All, > > Seeing as I have had my Inverted L ( 85' / 27M vertical ) against my tree's > trunk ( actually touching it - oops ) since I installed it, and as I also > have tress in the elbow, I may have to try and move it out some after reading > all the suggested articles. The only reason it is like it is, is for > convenience, as I have no towers ( or trees in the right location ) to hang > it off of atm so it was either that or no Inverted L. > > All I can and will say is that just "anecdotally" speaking and nothing else, > it will still work, not as good as one that is stood off a few feet I am sure > but better than nothing if it gets you on the air. Or to put it another way, > a poor antenna is much better than no antenna at all. > > Good Luck and remember YMMV > > 73, > Brian > VE3MGY > > > > > > > > From: Topband on behalf of Gary Smith > > Sent: October 3, 2018 9:27 PM > To: Topband@contesting.com > Subject: Re: Topband: Inv L in Tree > > Ed, > > FWIW, I'm using what used to be an INV-L. > I laid out a radial bed as well as > possible, next to a marsh. I am in a > hurricane area and with the winds, the > trees have fallen over. I originally shot > a line over a tall branch with a spud gun > I made (see it on my QRZ page, at the > bottom), at that time it was an "L". > > The branch came down and I used another > branch, albeit farther away. With > attrition, I am now using a tree maybe 30' > away from straight up. Doing it the way I > did allows me to have a radial bed away > from the trunk of a tree. I can't move the > bed so the type of antenna had to change. > I am using WD-1A field telephone wire for > my antennas, with its SS solid core it is > incredibly strong and it is so thin it is > very hard to see. > > It's not nearly as good of an antenna as > many here use but it is quite good, even > as a sloper. I was able to work 9X0T on > 160 tonight and could barely hear him with > the QRN & RFI but he heard me. Point being > that a sloper works very well on 160, you > don't "have to have" an INV-L. > > Whatever you go with, I wouldn't run the > antenna next to the trunk. I would keep it > some distance to the trunk and as long as > you have enough length for radials & > antenna & I'd use some method of getting a > stealthy wire like WD-1A up over & into > the tree-top and down to the radial plate. > > 73, > > Gary > KA1J > >> Has anybody snaked a wire up a tall tree trunk to make an Inv L? >> >> Any interaction? Success?? Has to be stealthy because the tree os >> my neighbor's :-) >> >> Thanks, >> Ed NI6S >> _ >> Topband Reflector Archives - http://www.contesting.com/_topband >> > > > > _ > Topband Reflector Archives - http://www.contesting.com/_topband > _ > 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: AA0RS sig in EU
Hi allYesterday I worked DL7CX, OT4A and PE5T just on my sunrise.73Adrian vk2wf Sent from my SAMSUNG Galaxy S7 on the Telstra Mobile Network Original message From: daraym...@iowatelecom.net Date: 12/9/18 6:58 am (GMT+10:00) To: topband@contesting.com, "Dr. Wolf Ostwald" Subject: Re: Topband: AA0RS sig in EU Greetings Topbanders. . .Wolf is right. Get out phones and fire up the filaments! I got on TB this morning for the first time this season (just got the antennas recommissioned after lightning season) and worked VK7CW, VK5XDX, VK2WF, and VK3HJ. No sign of our good friends from JA yet but things are looking up! 73. . .Dave, W0FLS -Original Message- From: Dr. Wolf Ostwald Sent: Saturday, September 08, 2018 2:35 PM To: topband@contesting.com Subject: Topband: AA0RS sig in EU Hello ! it seems that slowly the band nw opens up. Dave had a workable signal this morning into EU. It was a kind of 1 minute QSB intervall. And on the peak he was 549. But he came back to the second call . In them ol`days we used to work the westcoast by the third weekend in September. But from what i experienced the last years, we have less stns capable of bridging the continent and another ocean. Its about time everybody brings up the filaments and wears the headphones again. see u guys down there wolf df2py _ 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: WD8DSB & LU5OM 160 meter year long test complete
Hi AllArgentinaian stations are hard to work indeed from VK2. After 12 months on Topband I did finally work LU8DPM on 28 July 18.73Adrian VK2WF Sent from my SAMSUNG Galaxy S7 on the Telstra Mobile Network Original message From: VK3HJ Date: 3/8/18 3:20 pm (GMT+10:00) To: topband Subject: Re: Topband: WD8DSB & LU5OM 160 meter year long test complete I have heard Manuel a couple of times, just, but VK3 to anywhere east of the west coast of South America is difficult. Thankfully, I do have one QSO confirmed with him from two years ago. As far as regulars heard, I would have to mention AA1K, N0FW and K4IQJ, amongst others. At the very least, I can hear them pretty well every evening here. One particularly notable station worked here many times was HC1PF. Luis was a beacon every evening here a few years ago, until he moved back to Italy. I have six 268 m Beverage antennas, on a quiet rural property, so I do year very well. 73, Luke VK3HJ _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Radials in the desert
Hi Brian For the areas where there is heavy foot traffic, perhaps some artificial turf. 😊 73 Adrian Adrian Van Der Byl PO Box 39 MARULAN NSW 2179 Australia M: +61 418 288 911 E: vk...@bigpond.com -Original Message- From: Topband On Behalf Of Brian Pease Sent: Wednesday, 20 June 2018 11:30 PM To: topband@contesting.com Subject: Re: Topband: Radials in the desert One partial solution might be to collect small rocks and place them along each radial on top of the wire close enough together to provide clear visual cues. On 6/20/2018 9:23 AM, MICHAEL ST ANGELO wrote: > Chet, > > Have you tried digging a shallow trench with an edge trimmer? They are also > known as edgers. > > Mike N2MS > > >> On June 20, 2018 at 8:06 AM Chester Latawiec wrote: >> >> >> >> Any suggestions on burying radials in the desert sands of Kingman AZ? >> Radials placed on the surface just stay there and are constant tripping >> hazards. >> The desert sand is like rock. The top 1/4 inch is loose sand but below that >> it's like rock. You vertually need a pick axe to loosen the sublayer. One >> option is to pick axe a shallow trench for each radial in the desert sun, >> but tripping over the radials would be a better alternative. >> Any suggestions? >> I'm really getting tired of tripping over the radials of Jess, AI9L's radial >> field. >> 73 >> Chet VE3CFK >> >> >> Sent from my Samsung device >> _ >> Topband Reflector Archives - http://www.contesting.com/_topband > _ > 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: Laying ground radials
Hi LukeI have similar circumstance. I used the sharp point of a mattock.73Adrian VK2WF Sent from my SAMSUNG Galaxy S7 on the Telstra Mobile Network Original message From: VK3HJ Date: 7/6/18 1:31 am (GMT+01:00) To: topband@contesting.com Subject: Topband: Laying ground radials Later this year, I plan to lay down an in-ground radial field. I have sourced a copper wire supplier and have costed approximately 2000 m of 1.2 mm bare copper at around $800. Presently, I use an elevated counterpoise of 4 x quarterwave radials each for 180 and 80 m. I need to lay the wire just under the turf as I have livestock in the paddock. The radial field will be mostly in shallow mountain soil, with a couple of surface granite rocks to negotiate, as well as a large gum tree on one edge with many surface roots. I have a tractor, but feel that this will churn up the ground too much with the density of the work to be done. I have a ride-on mower that may be more useful. I will need to lay in the radials by hand around the rocks and tree roots, but would like to do it more easily for the rest of the job! What sort of implement can I obtain or create for this job? 73, Luke VK3HJ _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Laser Com introducing a breakthrough Top Band antenna at Dayton
I almost believed it but then I looked at the date.73Adrian VK2WF Sent from my SAMSUNG Galaxy S7 on the Telstra Mobile Network Original message From: kx4tt--- via Topband Date: 2/4/18 6:33 am (GMT+10:00) To: Don Kirk , donov...@starpower.net Cc: topBand List Subject: Re: Topband: Laser Com introducing a breakthrough Top Band antenna at Dayton I hope it's not Ben Lee KX4TT -- Original message--From: Don KirkDate: Sun, Apr 1, 2018 12:35To: donov...@starpower.net;Cc: topBand List;Subject:Re: Topband: Laser Com introducing a breakthrough Top Band antenna at Dayton Is Dr Dover’s first name April, and middle name Fools. :)73,Don (wd8dsb)On Sunday, April 1, 2018, wrote:>>>> Laser Com Announces New Topband Antenna System>>>>> Reported by Woody K3YV>>> Laser Com, Inc. of Titusville, Florida recently announced their> development of a revolutionary new 160 meter antenna system> based on their proprietary laser communications system.>>> Dr. Benjamin Dover, Laser Com’s chief engineer, cited their research> into laser-based space communications as providing the “happy> accident” that led to the discovery of the laser based 160 meter> antenna system.>>> Dr. Dover said that an accidental connection of the wrong cable> led to the discovery. A cable that had been carrying 1.8 MHz> signals was inadvertently connected to the modulation input of the> laser transmitter that that Ben was testing. “Imagine our surprise,”> said Dr. Dover, “when we noticed that 1.8 MHz radio frequencies> were being radiated all along the laser beam. This is something we> never expected. The possibilities are endless.”>>>> Laser Com plans to market the laser antenna not only as a commercial> product, but also as a low cost 160 meter amateur radio antenna.> Dr. Dover set up the prototype as a demonstration of the product’s> simplicity.>>> The secret to the 160 meter laser antenna is in the base unit’s> modulation transformer that directly modulates the Plesseo-Dyminium> laser crystal. The user simply places the laser box on the ground and> adjusts the laser beam straight up into the air. As the laser beam rises> into the sky, the 160 meter signal travels up the laser beam and is> radiated all along the length of the optical beam.>>> The laser beam shines nearly a mile into the atmosphere. However,> due to path losses along the beam, the actual 160 meter radiation is> only transmitted by the first few hundred feet of the laser’s beam. The> result is an omni-directional vertical 160 meter antenna that is several> hundred feet high.>>> Acting like a co-linear antenna array, the over all antenna gain is> approximately 10 to 15 dB in the 160 meter band.>>> Dr. Dover said, “We're really excited about this product. There are no> antenna restrictions on an invisible light beam, no lightning risks, and> no damage from wind storms. The only down side is s ignal attenuation> due to heavy fog, which can attenuate the 160 meter signal by as much> as 6 dB. Otherwise, this is as near to a perfect antenna as you can> hope for.”>>> Laser Com plans to introduce the amateur version of this antenna at the> Dayton Hamvention this May.>> _> Topband Reflector Archives - http://www.contesting.com/_topband>_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: Wednesday 160m DX Activity Night
Hi PaulInteresting!It would seem that one's location makes a big difference.Last night I managed AA1K, K1CP and W6ENZ.But on the previous night on Tuesday, nothing.73Adrian VK2WF Sent from my SAMSUNG Galaxy S7 on the Telstra Mobile Network Original message From: VK3HJ Date: 29/3/18 10:08 am (GMT+10:00) To: topband@contesting.com Subject: Re: Topband: Wednesday 160m DX Activity Night Wednesday night was positively awful from VK3. I called CQ for nearly an hour and gave up with no calls, and only local RBN reporting. By contrast, Tuesday night was quite good to NA, with a number of USA and a handful of Canadian stations, and one Japanese station calling! 73, Luke VK3HJ _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: 160m Vertical matching Help
In my experience the vertical with its top loading etc. Needs to be resonant at 2.1 Mhz. Then a 50 ohm match will be easily achieved with just a few turns from the bottom. I tried it first with the vertical resonant at 2.001 Mhz then I found that the impedance tapping point did also influence the resonant frequency of the antenna.73Adrian VK2WF Sent from my SAMSUNG Galaxy S7 on the Telstra Mobile Network Original message From: Ronald Gorski Date: 2/11/17 5:37 am (GMT+10:00) To: MR TREVOR DUNNE , "Wes Attaway (N5WA)" Cc: topband List Subject: Re: Topband: 160m Vertical matching Help Trevol, the portion of the coil between the tap and the base of the vertical determines resonance and needs to be variable unless you were lucky and found the correct value. The shunt portion of the coil affects the feed impedance. This shunt portion is like the hairpin match for a yagi. You select the series inductance to make the antenna slightly capacitive and adjust the shunt inductance to raise the feed impedance. Both these moves interact. Use a clip lead to vary the inductance of the series coil. Cheers, Ron N9AU -Original Message- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of MR TREVOR DUNNE Sent: Wednesday, November 01, 2017 12:12 PM To: Wes Attaway (N5WA) Cc: topband List Subject: Re: Topband: 160m Vertical matching Help Hi Wes Thanks for the reply I can move the point of lowest SWR by moving the tap on the coil, I need to lower the SWR I thought using the coil across the feed point would do this but its not working for me?? Thanks Trevor EI2GLB - Original Message - From: "Wes Attaway (N5WA)" To: "MR TREVOR DUNNE" , "topband List" Sent: Wednesday, 1 November, 2017 17:02:55 Subject: RE: Topband: 160m Vertical matching Help Without doing any modeling, an off the top of the head idea, one option would be to drop a wire down from the end of each of the T wires you have at the top. You might be able to move the point of lowest SWR down to 1.8 with 2x 15' +/- drop wires. --- Wes Attaway (N5WA) (318) 393-3289 - Shreveport, LA Computer/Cellphone Forensics AttawayForensics.com --- -Original Message- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of MR TREVOR DUNNE Sent: Wednesday, November 01, 2017 11:54 AM To: topband List Subject: Topband: 160m Vertical matching Help Hi All I finally got the vertical up and running, problem I have now is I can't find a low SWR on the coil, the best I can get is about 2.8:1 no matter where I tap the coil that's the best SWR, I can move that point up and down the band by moving the tap but the SWR stays the same, My current set up is about 55ft vertical I have 2 loading wires in a T shape, wires are 50ft either side of the vertical and the are pretty level and in line, I have 38 radials averaging about 45-60ft long, I will add more when time allows but don't the make the SWR worse ?? With no coil I get resonance at 2.12mhz with R=16 X=2 on my MFJ269, The coil is 25ft of 5mm copper brake pipe in a 4" diameter, the coil is attached to base of the vertical and the other end is grounded, Any pointers on what I can do to get a better match, Thanks Trevor EI2GLB _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
