Re: Topband: Rotator creating spur on 1820
Interesting you have the spur on 1820. I have the exact same situation on 1820 as well. Sometimes I can actually pull weak audio off the spur but have not been able to identify which local station or stations are mixing to create the spur. It never varies in strength and I just assumed it was part of the hazards of operating on topband. Didn't consider it might be the rotor and or cable going up the tower. In my situation it hasn't caused enough interference to detract form DXing so far in at lest 20 years +. Good information to have for those closer to AM broadcast towers in the future. Dick K9RT In a message dated 11/2/2017 10:41:52 A.M. Eastern Daylight Time, radi...@charter.net writes: I have a problem for which someone on this forum has the solution. I know that because I have seen that message sometime in the past. The problem is that my rotator is rectifying a couple of AM station signals and creating a spur on 1820. It's normally pretty weak on my receiving antennas but sometimes it's a problem. I found that if I listen on my XM-240 near that rotator it can be very loud. As soon as I move the rotator it causes the spur to go away, or become weak. A few minutes later it is back again. It pops in and out. So who had the problem and how did you fix it? Note that my XM-240 actually shows a low SWR on 160. That's because the XM-240 balun doesn't work well on 160 and the common mode currents on the feedline couple to the tower and the tower becomes the real antenna on 160. So in this case the tower is the antenna and it has that rotator cable against it picking up max signal from that cable (also radiating it to my other antennas). No, the XM-240 is not used on 160 (except to find the source of this problem). The rotator is a Yaesu G-2800DXA. Jerry, K4SAV _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Ecipse
Was away from the home QTH watching the total eclipse in Franklin, KY on the KY/TN border on I 65. Did monitor the BCB after the event and listeneed to WBT 1110 noting their 97% eclipse peak. Never audible at 2:45 pm this far west. Also noticed some enhancement on WSB-750 but most other channels were just jumbled with multi signals and couldn't pull out any ID's Dick K9RT In a message dated 8/21/2017 3:11:17 P.M. Eastern Daylight Time, k...@myfairpoint.net writes: Even though Maine was not in the Eclipse path, noticed noise in the West direction was below S-meter zero on 160 meter antennas. Normal lowest noise is East out over the Atlantic ocean.. 73 Bruce-K1FZ http://www.qsl.net/k1fz/beverage_antenna.html _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: 160 meter starter antennas
My starter antenna for topband is still the only transmit antenna I have for 160. About 100' sloper off the top of a 40' tower with the distant end about 8' off the ground supported from a tree. Of course a tuner is used and don't know what the effective radiaited power is, but I have managed to work 185 so far on 160. The listening side was enhanced several years ago with a K9AY loop which doesn't take too much room and brings the weak signals out of the noise better than the sloper most of the time. Good luck in the pileups as the new season is opening Dick K9RT In a message dated 9/22/2016 11:48:13 A.M. Eastern Daylight Time, k...@myfairpoint.net writes: This is the time of year that many of us in the Northern Hemisphere have been waiting for. DX is coming up, long and stronger. Many 'old timers' have their antennas "ready to roll". New comers to the band may want an inexpensive starter receive antenna, If there is space a beverage is a good forgiving antenna. For limited space: Despite some criticizing, a loop antenna can result in many DX contacts. Even SWL's in the AM radio BCB like them. Yes there are always better antennas, but many of us started with in-expensive wire types. 73 Bruce-k1fz http://www.qsl.net/k1fz/flag_antennas.html _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: Yikes
Amen!! A bargain and I made a donation on top of that. Happy to get last one on mixed DXCC!! In a message dated 2/19/2015 9:23:14 P.M. Eastern Standard Time, w...@sbcglobal.net writes: A bargain at twice the price. Larry K5RK -Original Message- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Doug Renwick Sent: Thursday, February 19, 2015 7:47 PM To: topband@contesting.com Subject: Topband: Yikes K1N club log is now up. First QSO costs $6.00 USD. That's got to be the most expensive I have seen. Anyone top that one. I am not complaining! Doug "There are some ideas so absurd that only an intellectual or lawyer could believe them." - George Orwell, 1984 --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
