Re: Topband: K1N DQRM Tracking Project
> I've been ham since 1969 and there has always been a issue with DQRM. > > Mike N2MS > - Original Message - > From: Donald Chester > > What does it say about the state of amateur radio to-day, that the term > "DQRM" has entered our jargon? Yes, it has been with us a long time. Largely (but not entirely) a legacy of the 75m AM v. SSB wars of the early 1960s. But in numerous discussions of the K1N issue was the first time I have ever heard of "DQRM". The addition of that term to our jargon must mean the problem has now surpassed some critical mass of pervasiveness. Don k4kyv _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: 630 Crossband Saturday Night
Since getting the new 630m band (472-479KHz) here in Canada, one of my favorite ways of promoting interest in the new band has been 'crossband' activity ... that is, transmitting on 630m while the other stations transmit on a predetermined announced HF (QSX) frequency, usually on 80 or 160m. There are many amateurs in the U.S. who are interested in getting the band as well as many Canadians that are interested in getting on the band and the crossband activity usually generates a lot of interest. The last time this was done, over a dozen stations (from W3, W5 to local) were worked via the crossband mode. A summary of that evening is posted here: http://ve7sl.blogspot.ca/2014/11/630m-crossband-summary.html Both myself and John, VE7BDQ, have enjoyed making other crossband contacts this past winter and will once again be soliciting crossbanders this coming Saturday evening. Our plan is to operate from 0200Z through 0700Z, (1800-2300 PST Saturday). Beginning at the top of the hour, we will both be calling CQ on CW and listening for any callers on HF. CQ's will continue until there are no more callers and will begin again at the next top of hour time slot. This should allow for a wide variation in propagation and the possibility of eastern contacts as the evening progresses. The frequencies will be: a.. VE7SL TX 473.00KHz QSX (listening) 1808KHz (160m) and 3535KHz (80m) a.. VE7BDQ TX 474.00KHz QSX (listening) 1813KHz (160m) It is hoped that as many stations as possible will give a listen for us and be able to call on one of the HF QSX frequencies. Both John and myself will be running at the maximum allowable eirp for the duration of the activity. If you have not had a look for any 630m stations, hopefully you will take the opportunity this coming Saturday night ... you really do not need any special antennas for receiving on 630m. Many of the stations that I have worked on crossband have been using HF dipoles for low-noise reception. Please feel free to post this message to other groups as well...and, watch the blog for further updates. See you Saturday I hope! Steve / VE7SL WEB - "The VE7SL Radio Notebook": http://members.shaw.ca/ve7sl VE7SL BLOG - "Homebrewing and Operating Adventures From 2200m to Nanowaves": http://ve7sl.blogspot.ca/ _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: Alternating tone RFI
I’ve also posted this on the RFI reflector. I’m hearing a peculiar RFI tone on 160m and 80m. It’s two tones. One is a long tone with a short OFF. The other is approximately 13 kc lower and is ON exactly when the first tone is off. Sometimes the second tone appears plus and minus 13 kc from the longer tone’s frequency. I notice this every night but not until at least an hour or two after sunset. It’s not on in the early hours prior to sunrise. Signal strength appears to be directional. I’ve heard it occasionally on an upper HF band like 17m during the day but it’s much weaker. I can’t find anything online that matches this description. Any ideas on what to search for will be appreciated. Steve WB6RSE _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: K1N DQRM Tracking Project
I've been ham since 1969 and there has always been a issue with DQRM. Mike N2MS - Original Message - From: Donald Chester To: topband@contesting.com Sent: Wed, 11 Feb 2015 20:54:33 - (UTC) Subject: Re: Topband: K1N DQRM Tracking Project What does it say about the state of amateur radio to-day, that the term "DQRM" has entered our jargon? _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Inverted-L with coil on the top of the vertical section
You didn't say how long the horizontal portion of your inverted-L was. If we knew that, that would help us help you. :-) FWIW, W1BB himself said that an inverted-L could have a vertical section of only 25 feet, and still be worthwhile. 73, Mike www.w0btu.com/160_meters.html#inv-l_antenna On Tue, Feb 10, 2015 at 4:09 PM, Adrian Fabry wrote: > > I'd like to build an Inverted-L antenna. Unfortunately the vertical > section will be only 8m (26 ft) high and the radial system not great (maybe > 5 to 10 wires laying on the ground) > _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Inverted-L with coil on the top of the vertical section
Hi James, Thank you for the hint. I read the article, and I see t's a very good solution. For the moment I can't install this elevated FCP. I have to mention my soil is good, quite wet most of the winter. 73 Ady YO2NAA -Original Message- From: James Bennett [mailto:w6...@me.com] Sent: Wednesday, February 11, 2015 2:30 AM To: Adrian Fabry Cc: topband@contesting.com Subject: Re: Topband: Inverted-L with coil on the top of the vertical section Ady - you might consider using a Folded CounterPoise, designed by K2AV, for your "radial" system. I have one on each of my Inverted L antennas; 160 & 80 meters. They work quite well if you do not have the real estate for a lot of radial wires. My 160 Inverted L only goes up 35-40 feet bit with the FCP it performs very well. > On Feb 10, 2015, at 2:09 PM, Adrian Fabry wrote: > > Hello all, > > > > I'd like to build an Inverted-L antenna. Unfortunately the vertical section > will be only 8m (26 ft) high and the radial system not great (maybe 5 to 10 > wires laying on the ground) > > The simulation (with MMANA software) indicate 3.5 +j0 Ohm impedance. This is > very low so I think most of the power will be lost in the ground. > > In order to raise the impedance, I would insert a coil (about 75 uH) on the > top of the vertical section and restore the resonance with 48.7 pF series > capacitor on the feed point. > > This will raise the impedance to 34 ohm. > > > > Is this solution OK? Should I better place the coil at the feed point ? > > > > I know it would be much better to increase the height of the vertical > section and to install more radials or a ground screen, but this is not > possible for the moment, so I have to find the best compromise. > > > > > > Thanks for reading. > > > > 73 Ady YO2NAA > > _ > Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Inverted-L with coil on the top of the vertical section
Thank you Rick. I can see an increase in the horizontal radiation but it seems there is still enough vertical radiation. Without load https://cloud.orange.ro/share/93be10d491e0c6b632fe49b9804e78e3?d=&c=&r=#1 With 75uH load https://cloud.orange.ro/share/e035179a07e18f4832fe49b9804e78e3?d=&c=&r=#1 (Vertical=red, horizontal=blue) I don't know what other TX antenna will be suitable for my condx: House top @29 ft, a pillar @19ft and a pole @8ft, see bellow. https://cloud.orange.ro/share/36474948adb7a57132fe49b9804e78e3?d=&c=&r=#1 I don't expect much, I just hope this INV-L will perform better than my FD3 (OCF dipole 20m long Z=1-j2600 on 160m) TNX & 73 Ady YO2NAA -Original Message- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Richard Karlquist Sent: Wednesday, February 11, 2015 1:38 AM To: topband@contesting.com Subject: Re: Topband: Inverted-L with coil on the top of the vertical section On 2015-02-10 14:09, Adrian Fabry wrote: > The simulation (with MMANA software) indicate 3.5 +j0 Ohm impedance. > This is > very low so I think most of the power will be lost in the ground. > > In order to raise the impedance, I would insert a coil (about 75 uH) on > the > top of the vertical section and restore the resonance with 48.7 pF > series > capacitor on the feed point. > > This will raise the impedance to 34 ohm. > You have to be careful with loading inverted L antennas. What is happening here is that the horizontal top wire is now doing most of the radiating. You basically have a very low dipole. There will be a lot of ground loss due to the height. I think you would be disappointed if you built this. Rick N6RK _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: K1N DQRM Tracking Project
What does it say about the state of amateur radio to-day, that the term "DQRM" has entered our jargon? _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: HVDC
Gents: The shock one would get under such circumstances was one of the reasons that early studies into the effects of HV AC lines were flawed. I believe even Brodeur's work cited this erroneous work. Apparently, the studies included the effects of HV fields on rabbits, kept in screened pens in strong electric fields (the details of which escape me now.) These bunnies lost weight while in their pens, whereas the control group of rabbits, not subjected to such fields, did not lose weight. "Eurika!," exclaimed the protesters. However, it turns out that all the test subjects were fed from metallic bowls. The ones inside the strong field received a mild shock from the induced voltage around their feeding bowls and consequently were discouraged from eating. The control group ate as if nothing was happening. 73 de Gene Smar AD3F On 02/11/15, Lee K7TJR wrote: You don't step off a combine when harvesting under HVAC lines. You learn to jump off real quick. I think it is capacitive coupling. The larger combines pack a real wallop when under HVAC lines. I lived near Portland Oregon for a long time. There was a 480 KV line about a mile away. Fizz with a 180 HZ component. I could not use 160 meters when there was any fog because of Corona discharge. Tree N6TR lived near this same line for a while. He even convinced them to turn it off once to see if it was his problem as well. Maybe he will jump in on this topic. Lee K7TJR OR -Original Message- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Gary Smith Sent: Wednesday, February 11, 2015 9:45 AM To: Topband@contesting.com Subject: Re: Topband: HVDC I have never had any personal experience with HVDC but I do have a personal experience with HVAC power lines that I will never forget. I lived in Highland Indiana, about 1/2 mile south of I-80 and in between there were HVAC power lines and there were no houses underneath them and it was a perfect place for me to take my fiddle to practice. I was just starting to play this new instrument and the animals in the house didn't like the sound of me learning so to be kind I went and parked underneath the power lines, raised the trunk on my Dodge Caravan and practiced for several hours. When I went to leave, the car wouldn't start though the engine would turn over and all of the features like radio and lights were working perfectly. I had never had a problem with that before with this car. I searched as much as I could to find fuse-wise what might be the problem but nothing was amiss. I looked in the Haynes repair book that I kept in the car and it showed a connector leading to the fuel pump in the undercarriage, between the passenger's door and the side sliding door. I went underneath to see if that connection had become compromised. I was in a T-shirt, it was summer, warm and a little sweaty. As I was working underneath I felt what I thought was a bee sting on my forearm. Jerked the arm away but didn't see a Bee and went back to trying to find that connection and I felt another sting close to where the first one was. When I looked I saw it wasn't a Bee but instead, it was where my arm lightly brushing against the body of the car. The sting was from a small electric arc and it was burning my skin. There was nothing in the car that would cause that to happen and then I realized the power lines were overhead and that me being on the ground and touching the metal of the car was completing a connection from what I assume was inductance from the metal in the car, gathered from the lines overhead. I called a friend to come and tow me back home and while I was sitting on the rear of the minivan waiting for him, I realized I was feeling a consistent vibration and that I could especially notice it by touching the rear bumper. It felt for the world like the car was running and I was feeling the vibration of the engine. The car was vibrating at 60 HZ from those overhead lines that had earlier caused me to get a small, white, pinpoint burn on my forearm. It turns out the problem was the fuel pump was not working and whether it was damaged from that HV electricity or if it just by happenstance failed at that time, I have no idea but I never forgot that. And that was the day I also learned that fuel pumps were now being built into the fuel tank, surrounded by gasoline... I learned a lot that day. I have 11 years of formal education in healthcare but I'm not an authority as to damage that electromagnetics may cause. My father worked around electronics and ham radio his whole life and died at 97, never having cancer or anything like it. I'm not concerned much at all about RF exposure, but after experiencing what I personally did, I will never willingly live close to HVAC power lines if I have the choice. 73, Gary KA1J Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband ___
Re: Topband: HVDC
I think my message was sent prematurely..sorry.As I was saying, my DXers dream location is located only 1/2 mile from the main 550kV line from the nuclear plant on Lake Huron to London, ON. I have NE and S Beverages that point right at it in the winter. The only time this power line gives me grief is the frying egg noise during fog or Scotch mist precipitation events. This noise is easily removed by the NB1 on my old FT-1000MP. So it is not a problem. What IS a problem are the wind turbines that have sprung up all around me in the last year. The closest is due east about 600m (minimum distance to a dwelling) and can really be heard on 160 and 80m. Fortunately it is only a problem on AM or LSB, not CW with 250Hz filter. Main harmonic is on 1890.5 and you can hear the mechanical noise as the turbine turns. I have made recordings in AM, LSB and CW with the wind turbines stopped and turning at 5 or 9 rpm. Fortunately no birdies below 1830! Anyone interesting in these recordings can email me for a file. The Beverages still work, but the NE is much noisier than before. Bummer. Jeff VE3CV _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Radial Plate Design
> w8ji at w8ji.com > Wed Feb 4 11:32:18 EST 2015 > I just twist my wires in a > "coherent lump", flux it with liquid flux, and flood the twisted area with > solder. If I get really sophisticated, I slide a piece of copper pipe over > the twisted area, crimp it, and flood the whole inside with solder. > > At towers, where people have to walk over the radials and a bunch of wires > are a PITA, I solder to a square made from copper flashing. NEVER use regular lead/tin solder if there is any possibility that it will come in direct contact with the soil. Minerals in the soil will quickly turn the solder to white powder. I once used leaded solder to attach ground radials to a copper ring at the base of an inverted L. I ended up having to re-solder the entire ring of radials about once a month. The soldered connection would just fall apart, and the radial wires would fall loose from the ring. The radials to my present vertical were attached using silver alloy brazing rods, heated with a Mapp Gas torch. The rods and torch are widely available at plumbing suppliers, since it is against code to use regular lead solder with copper plumbing for the same reason that it doesn't work with ground radials; minerals in the water eventually destroy the soldered connection and the pipe joint springs a leak, plus the danger that lead may leach and contaminate the drinking water. The rods are not cheap, but they are not prohibitively expensive either. I brazed my radial system together in 1983, the soldered connections are buried below grade, and the silver solder connections are as solid to-day as the day they were installed, with no visible corrosion. Above-ground connections exposed to the elements over the past 32 years likewise remain intact. I use 15% silver content flat brazing rods, about 1/8" wide and 18" long. No flux is necessary. Copper sucks up that silver brazing alloy like a sponge soaks up water. Just remove any dirt or scaly corrosion with a wire brush; no need to polish the copper to a sheen. I could never understand why anyone would prefer to use a crappy metal plate with screw-on connections, when it is so simple to silver-braze connections that will last for the life of the radial system and vertical radiator, and will probably outlast the life of the antenna owner. A screw-on connection, especially in contact with the soil and subject to outdoor temperature variations will eventually fail. Those Hammy Hambone radial plates I have seen advertised are considerably more expensive than a handful of silver brazing rods and a Mapp gas outfit. Don k4kyv _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: HVDC
You don't step off a combine when harvesting under HVAC lines. You learn to jump off real quick. I think it is capacitive coupling. The larger combines pack a real wallop when under HVAC lines. I lived near Portland Oregon for a long time. There was a 480 KV line about a mile away. Fizz with a 180 HZ component. I could not use 160 meters when there was any fog because of Corona discharge. Tree N6TR lived near this same line for a while. He even convinced them to turn it off once to see if it was his problem as well. Maybe he will jump in on this topic. Lee K7TJR OR -Original Message- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Gary Smith Sent: Wednesday, February 11, 2015 9:45 AM To: Topband@contesting.com Subject: Re: Topband: HVDC I have never had any personal experience with HVDC but I do have a personal experience with HVAC power lines that I will never forget. I lived in Highland Indiana, about 1/2 mile south of I-80 and in between there were HVAC power lines and there were no houses underneath them and it was a perfect place for me to take my fiddle to practice. I was just starting to play this new instrument and the animals in the house didn't like the sound of me learning so to be kind I went and parked underneath the power lines, raised the trunk on my Dodge Caravan and practiced for several hours. When I went to leave, the car wouldn't start though the engine would turn over and all of the features like radio and lights were working perfectly. I had never had a problem with that before with this car. I searched as much as I could to find fuse-wise what might be the problem but nothing was amiss. I looked in the Haynes repair book that I kept in the car and it showed a connector leading to the fuel pump in the undercarriage, between the passenger's door and the side sliding door. I went underneath to see if that connection had become compromised. I was in a T-shirt, it was summer, warm and a little sweaty. As I was working underneath I felt what I thought was a bee sting on my forearm. Jerked the arm away but didn't see a Bee and went back to trying to find that connection and I felt another sting close to where the first one was. When I looked I saw it wasn't a Bee but instead, it was where my arm lightly brushing against the body of the car. The sting was from a small electric arc and it was burning my skin. There was nothing in the car that would cause that to happen and then I realized the power lines were overhead and that me being on the ground and touching the metal of the car was completing a connection from what I assume was inductance from the metal in the car, gathered from the lines overhead. I called a friend to come and tow me back home and while I was sitting on the rear of the minivan waiting for him, I realized I was feeling a consistent vibration and that I could especially notice it by touching the rear bumper. It felt for the world like the car was running and I was feeling the vibration of the engine. The car was vibrating at 60 HZ from those overhead lines that had earlier caused me to get a small, white, pinpoint burn on my forearm. It turns out the problem was the fuel pump was not working and whether it was damaged from that HV electricity or if it just by happenstance failed at that time, I have no idea but I never forgot that. And that was the day I also learned that fuel pumps were now being built into the fuel tank, surrounded by gasoline... I learned a lot that day. I have 11 years of formal education in healthcare but I'm not an authority as to damage that electromagnetics may cause. My father worked around electronics and ham radio his whole life and died at 97, never having cancer or anything like it. I'm not concerned much at all about RF exposure, but after experiencing what I personally did, I will never willingly live close to HVAC power lines if I have the choice. 73, Gary KA1J Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: HVDC
I have never had any personal experience with HVDC but I do have a personal experience with HVAC power lines that I will never forget. I lived in Highland Indiana, about 1/2 mile south of I-80 and in between there were HVAC power lines and there were no houses underneath them and it was a perfect place for me to take my fiddle to practice. I was just starting to play this new instrument and the animals in the house didn't like the sound of me learning so to be kind I went and parked underneath the power lines, raised the trunk on my Dodge Caravan and practiced for several hours. When I went to leave, the car wouldn't start though the engine would turn over and all of the features like radio and lights were working perfectly. I had never had a problem with that before with this car. I searched as much as I could to find fuse-wise what might be the problem but nothing was amiss. I looked in the Haynes repair book that I kept in the car and it showed a connector leading to the fuel pump in the undercarriage, between the passenger's door and the side sliding door. I went underneath to see if that connection had become compromised. I was in a T-shirt, it was summer, warm and a little sweaty. As I was working underneath I felt what I thought was a bee sting on my forearm. Jerked the arm away but didn't see a Bee and went back to trying to find that connection and I felt another sting close to where the first one was. When I looked I saw it wasn't a Bee but instead, it was where my arm lightly brushing against the body of the car. The sting was from a small electric arc and it was burning my skin. There was nothing in the car that would cause that to happen and then I realized the power lines were overhead and that me being on the ground and touching the metal of the car was completing a connection from what I assume was inductance from the metal in the car, gathered from the lines overhead. I called a friend to come and tow me back home and while I was sitting on the rear of the minivan waiting for him, I realized I was feeling a consistent vibration and that I could especially notice it by touching the rear bumper. It felt for the world like the car was running and I was feeling the vibration of the engine. The car was vibrating at 60 HZ from those overhead lines that had earlier caused me to get a small, white, pinpoint burn on my forearm. It turns out the problem was the fuel pump was not working and whether it was damaged from that HV electricity or if it just by happenstance failed at that time, I have no idea but I never forgot that. And that was the day I also learned that fuel pumps were now being built into the fuel tank, surrounded by gasoline... I learned a lot that day. I have 11 years of formal education in healthcare but I'm not an authority as to damage that electromagnetics may cause. My father worked around electronics and ham radio his whole life and died at 97, never having cancer or anything like it. I'm not concerned much at all about RF exposure, but after experiencing what I personally did, I will never willingly live close to HVAC power lines if I have the choice. 73, Gary KA1J --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: HVDC
As the Nicolai Tesla and Thomas Edison war ragged on between the adoption of DC versus AC for commercial power distribution, Edison was said to have engaged in a large financed propaganda campaign call Tesla's AC distribution method "the currents of death." This included graphic cartoons of the fact that with a DC shock a person would be able to let go while with AC the person muscles would contract and they would be drawn into the "more dangerous" electricity. With the help of George Westinghouse Tesla eventually got his idea adopted universally. But in the 50's there were still parts of the world like Manaus Brazil on the Amazon River still using DC to power the city. Even more ironic was the Canal Zone which was using 25HZ AC to run their operation. Imagine the size of their transformers with this frequency. Herb Schoenbohm, KV4FZ I think people are being silly. Not only has there never been any evidence (beyond some fraudulent thing that created hysteria) that power lines ever cause health problems, a dc line has much less radiation. As far as Ham radio, a dc is far less problematic for noise. 690 kV dc is like 487 kV ac, except the line doesn't have the charging and discharging issues that generate a lot of noise in bad connections. The only possible issues would be noise at the dc-to-ac converters, but they might be miles from you. I wouldn't worry, and I would not support those who worry about other issues like safety or health. 73 Tom Tom is referring to a book published in 1976 by Paul Brodeur titled "The Zapping of America." The subject was bio-effects of AC powerlines. He also wrote several articles for the New Yorker which is a well known "scientific journal." Most of the objections are from environmental issues. We have the "Northern Pass" project in NH that is driving the Sierra Club and many others nuts over despoiling the natural beauty of NH. Craig K1QX _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: HVDC
-- Message: 5 Date: Tue, 10 Feb 2015 13:06:10 -0500 From: "Tom W8JI" To: , "Ws9v" Subject: Re: Topband: HVDC Message-ID: <211423F3EBEA4A55869EB37C0B05EA04@MAIN> Content-Type: text/plain; format=flowed; charset="UTF-8"; reply-type=original > Through the center part of Illinois they have begun work at the government > level to install a 690,000 VDC power line As with all this there is huge > amount of opposition an even groups trying to ban it > > Does anyone have any experience with a line of such high VDC as a noise > source ? It will pass within 3/4 of a mile south of my QTH > > > > I am really concerned my only hope if this goes thru is to pull up stakes > an move rather than attempt to fight its noise > > Any thoughts I think people are being silly. Not only has there never been any evidence (beyond some fraudulent thing that created hysteria) that power lines ever cause health problems, a dc line has much less radiation. As far as Ham radio, a dc is far less problematic for noise. 690 kV dc is like 487 kV ac, except the line doesn't have the charging and discharging issues that generate a lot of noise in bad connections. The only possible issues would be noise at the dc-to-ac converters, but they might be miles from you. I wouldn't worry, and I would not support those who worry about other issues like safety or health. 73 Tom >Tom is referring to a book published in 1976 by Paul Brodeur titled "The Zapping of America." >The subject was bio-effects of AC powerlines. He also wrote several articles for the New Yorker >which is a well known "scientific journal." >Most of the objections are from environmental issues. We have the "Northern Pass" project in NH that is driving the Sierra Club >and many others nuts over despoiling the natural beauty of NH. >Craig K1QX _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Fwd: Re: BoGs, BaGs and BuGs
Note... It's necessary to remove the space from that url. Thanks, though! Jeff W6JK On Wednesday, February 11, 2015 5:50 AM, K1FZ-Bruce wrote: 500 feet is too long for a low band BOG unless sitting upon an insulating earth like sand. For info see www.qsl.net/k1fz/ bogantennanotes/index.html 73 Bruce-K1FZ On Wed, 11 Feb 2015 09:41:45 +, Larry via Topband wrote: Sent this before, and not sure it made it, or perhaps it was not worth > responding to- > > > I have been contemplating listening antennas, and after hearing a > > friend work station after station that I could hear only down in the > > noise on my inverted Vee, while he was using a 500' Beverage on the > > Ground (aka BoG) I am convinced that I want to install several. > > > Best to all, > > Larry KD8WSP > > _ > Topband Reflector Archives - http://www.contesting.com/_topband > > - End forwarded message - _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: : Re: BoGs, BaGs and BuGs
500 feet is too long for a low band BOG unless sitting upon an insulating earth like sand. For info see www.qsl.net/k1fz/bogantennanotes/index.html 73 Bruce-K1FZ On Wed, 11 Feb 2015 09:41:45 +, Larry via Topband wrote: Sent this before, and not sure it made it, or perhaps it was not worth > responding to- > > > I have been contemplating listening antennas, and after hearing a > > friend work station after station that I could hear only down in the > > noise on my inverted Vee, while he was using a 500' Beverage on the > > Ground (aka BoG) I am convinced that I want to install several. > > > Best to all, > > Larry KD8WSP > > _ > Topband Reflector Archives - http://www.contesting.com/_topband > > - End forwarded message - _ Topband Reflector Archives - http://www.contesting.com/_topband - End forwarded message - _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: Fwd: Re: BoGs, BaGs and BuGs
500 feet is too long for a low band BOG unless sitting upon an insulating earth like sand. For info see www.qsl.net/k1fz/ bogantennanotes/index.html 73 Bruce-K1FZ On Wed, 11 Feb 2015 09:41:45 +, Larry via Topband wrote: Sent this before, and not sure it made it, or perhaps it was not worth > responding to- > > > I have been contemplating listening antennas, and after hearing a > > friend work station after station that I could hear only down in the > > noise on my inverted Vee, while he was using a 500' Beverage on the > > Ground (aka BoG) I am convinced that I want to install several. > > > Best to all, > > Larry KD8WSP > > _ > Topband Reflector Archives - http://www.contesting.com/_topband > > - End forwarded message - _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: [TowerTalk] Radial Plate Designs
"Those Hammy Hambone radial plates I have seen advertised are considerably more expensive than a handful of silver brazing rods and a Mapp gas outfit." Don, All good points. A few weeks back, there was a discussion here about the virtues of using MAPP gas or acetylene with silver brazing rods. I agree that the currently available radial plates are inferior to a ring composed of brazed silver-solder connections. However, if a plate is used, a two-hole lug offers many mechanical and electrical advantages over the single hole type, but: (1) the 2-hole lug cost is a significant limiting factor; and (2) no matter how good the bolted connection, over time it will be inferior to a brazed bond. Between the cost of a new plate design and say...a bag of 100 2-hole lugs, bolts, washers, and nuts, the cost will easily exceed a brazed grounding system of the type you discussed. Paul, W9AC _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: K1N DQRM Tracking Project
Mike Waters wrote: > You may have seen an old Wullenweber antenna array at one of those older > FCC sites. IIRC, one is (or was) on the east coast. AFAIK, the Wullenweber > is not used anymore by the FCC and is scheduled to be (or already has been) > replaced with a different --and far less complex-- antenna. > > A story ran in Stars and Stripes (mil newspaper) 2 or 3 months ago saying that the Wullenweber at Misawa Japan was then being decommissioned and torn down. The sole surviving such site was now at Elmendorf AFB AK. Bob k2euh _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: BoGs, BaGs and BuGs
Sent this before, and not sure it made it, or perhaps it was not worth responding to- I have been contemplating listening antennas, and after hearing a friend work station after station that I could hear only down in the noise on my inverted Vee, while he was using a 500' Beverage on the Ground (aka BoG) I am convinced that I want to install several. The best direction and distance I have is about 25/205 degrees true; I can put up a two way 1000' + BaG (Beverage above ground) with little to no elevation change. That'll give me 2 wavelengths on 160 and 4 on 80 meters. I have high terrain from about 60 degrees around to 200 degrees true azimuth; everything else is level or lower. I can get about 500' due west ( high terrain immediately to the east) and about 700' at 50 to 60 degrees. In order to get those, I would have to cross under high tension wires, and I was thinking that it would be best to run a BoG for those two, possibly even underground for the portion running under the lines. I am thinking of using 16/2 copper landscape wire, which appears to show an impedance around 200 ohms. Several questions for the group: 1) is it worth it to install a beverage at 25 degrees especially for 160? I'm not sure that I'd get much at that azimuth from FM19 2) I know that it is considered a bad idea to run parallel to power lines, but what about an oblique angled cross? 3) the two BoGs would cover about 100' elevation change, perhaps more. Will that ruin the directional pattern of the Beverage? Any thoughts or suggestions? Best to all, Larry KD8WSP _ Topband Reflector Archives - http://www.contesting.com/_topband
