Re: [AMRadio] Antennas
There have been some interesting cases with short loaded antennas in the BC band, the bandwidth has occasionally been so narrow that the AM sidebands become attenuated! Not going to see that effect in the amateur bands unless someone is running an antenna only a few feet long!! Bernie W8RPW I almost have that situation on 160m when I use my 80m dipole, fed with open wire line and balanced tuner. I can move maybe +/- 5 kHz before I have to retune. Using that antenna set-up is like being crystal controlled, since I have to go down to the tower to re-set the tuner. Hopefully, by upcoming season I'll have my remote tuning system, with reversible DC motor, so I'll at least be able to QSY within the same band without a trip to t he tower. I hope to eventually make it so I can change bands remotely as well. Don k4kyv ___ This message was typed using the DVORAK keyboard layout. http://www.mwbrooks.com/dvorak/ http://gigliwood.com/abcd/ __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Antennas
well Don, The good thing about that is it must be fairly efficient. That thing is probably only a few ohms R and a bunch of x, any significant series r would make it wider, sort of like a 100 ft run of small coax and an SWR of only 4 to 1 on 28 mc. it could be a dead short on the antenna end. 80 has been so noisy lately that I have about given up. Bernie W8RPW Original Message - From: D. Chester k4...@charter.net To: amradio@mailman.qth.net Sent: Tuesday, June 22, 2010 11:35 AM Subject: Re: [AMRadio] Antennas There have been some interesting cases with short loaded antennas in the BC band, the bandwidth has occasionally been so narrow that the AM sidebands become attenuated! Not going to see that effect in the amateur bands unless someone is running an antenna only a few feet long!! Bernie W8RPW I almost have that situation on 160m when I use my 80m dipole, fed with open wire line and balanced tuner. I can move maybe +/- 5 kHz before I have to retune. Using that antenna set-up is like being crystal controlled, since I have to go down to the tower to re-set the tuner. Hopefully, by upcoming season I'll have my remote tuning system, with reversible DC motor, so I'll at least be able to QSY within the same band without a trip to t he tower. I hope to eventually make it so I can change bands remotely as well. Don k4kyv ___ This message was typed using the DVORAK keyboard layout. http://www.mwbrooks.com/dvorak/ http://gigliwood.com/abcd/ __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[AMRadio] INDIAN STATION STILL FOR SALE
Revised ad includes shipping option: Finances force the sale of my Heath station. Apache TX1, minor audio mods done. Mohawk RX1, Steve Bonomo mods done, will include docs, Rare AK-5 Speaker, Marauder HX1, stock operating condition, just repaired. SB-10, operates a little flaky, dirty pots, etc. VHF-1 Seneca 6-2 meter AM/CW transmitter, Johnson 275 watt match-box, works great. HO-10 monitor scope, works fine. 2 mics, both with newer crystal elements. I can meet someone in the western MT, or northern ID/eastern WA. Shipping would be BIG $$$. Would like to get $850 for the whole station. If someone comes here, I'll throw in a little 30 ft. aluminum tower that can be broken down into 8 ft sections. Freight for a 450 lb crate to Miami would be about $460, other closer areas less, of course. Will pack in foam lined wood crate for shipping. Norm Palin 406-212-0059 K 7 N-orms C-lassic R-adio Not racist, not violent, just not silent anymore!! __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Antennas
There have been some interesting cases with short loaded antennas in the BC band, the bandwidth has occasionally been so narrow that the AM sidebands become attenuated! Not going to see that effect in the amateur bands unless someone is running an antenna only a few feet long!! Correct. This has been observed on my 75M AM mobile signal, with reports of one sideband being attenuated relative to the other. Antenna is a Webster bandpanner (a few feet long). 73, -Larry/NE1S -- Pay a visit to my amateur radio web page at: ne1s.rfburn.org __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] INDIAN STATION STILL FOR SALE
Hi Norm, Try shipping by Greyhound Bus. Mush cheaper and they take good care of their cargo. The only downer is that you have to deliver the consignment to the depot and the consignee has to pick it up on the other end. Small concession for lower rates and safer handling. 73 and good luck, John, W4AWM __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Antennas
The other interesting thing about HiQ antennas is that the final must be neutralized very well else it will tend go into some weird oscillations with the slightest mistuning and may oscillator with modulation or at least have significant phasing products causing the signal to be much wider than it otherwise would be. I am not sure, in the case where neutralization is perfect, if HiQ tuning would cause phasing products with modulation near the slope of the tuning curve or not. It seems to me that it would, but the attenuation of the slope may cover that up. John -Original Message- From: amradio-boun...@mailman.qth.net [mailto:amradio-boun...@mailman.qth.net] On Behalf Of D. Chester Sent: Tuesday, June 22, 2010 10:36 AM To: amradio@mailman.qth.net Subject: Re: [AMRadio] Antennas There have been some interesting cases with short loaded antennas in the BC band, the bandwidth has occasionally been so narrow that the AM sidebands become attenuated! Not going to see that effect in the amateur bands unless someone is running an antenna only a few feet long!! Bernie W8RPW I almost have that situation on 160m when I use my 80m dipole, fed with open wire line and balanced tuner. I can move maybe +/- 5 kHz before I have to retune. Using that antenna set-up is like being crystal controlled, since I have to go down to the tower to re-set the tuner. Hopefully, by upcoming season I'll have my remote tuning system, with reversible DC motor, so I'll at least be able to QSY within the same band without a trip to t he tower. I hope to eventually make it so I can change bands remotely as well. Don k4kyv ___ This message was typed using the DVORAK keyboard layout. http://www.mwbrooks.com/dvorak/ http://gigliwood.com/abcd/ __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Antennas
Hi Larry: what a dinosaur!!! you might even be older that I am. I have not heard an 80 AM station since 1950s. but that sure qualifies for a few feet. I wonder if anyone ever thought there was something wrong with their xmtr. bet you could tell them that you are setting it for side band the way TV does!! Bernie - Original Message - From: Larry Szendrei n...@securespeed.us To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Tuesday, June 22, 2010 12:19 PM Subject: Re: [AMRadio] Antennas There have been some interesting cases with short loaded antennas in the BC band, the bandwidth has occasionally been so narrow that the AM sidebands become attenuated! Not going to see that effect in the amateur bands unless someone is running an antenna only a few feet long!! Correct. This has been observed on my 75M AM mobile signal, with reports of one sideband being attenuated relative to the other. Antenna is a Webster bandpanner (a few feet long). 73, -Larry/NE1S -- Pay a visit to my amateur radio web page at: ne1s.rfburn.org __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Antennas
Bernie Doran wrote: Hi Larry: what a dinosaur!!! you might even be older that I am. I have not heard an 80 AM station since 1950s. but that sure qualifies for a few feet. I wonder if anyone ever thought there was something wrong with their xmtr. bet you could tell them that you are setting it for side band the way TV does!! Bernie Hi Bernie! Yep, vestigial sideband. Nope, you're older, but I probably have older gear! The first time I got a report like that I didn't think much of it. The second time it was from I a guy whose technical expertise I knew and trusted, so I took it as accurate. At first I couldn't think what might make a classic plate-modulated class C transmitter have asymmetric sidebands, and wasn't coming up with anything for a satisfying explanation (mobile transmitter was/is an Elmac A-54H, class C 807 modulated by pair of 5881s). Then I though about how sharp the antenna tuned, and I came to the conclusion the antenna was acting as a sideband filter - albeit not a terribly effective one (assuming you wanted SSB - but who would want that? ;-)) 73 and hope to talk to you on the air again this fall/winter, -Larry/NE1S - Original Message - From: Larry Szendrei n...@securespeed.us To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Tuesday, June 22, 2010 12:19 PM Subject: Re: [AMRadio] Antennas There have been some interesting cases with short loaded antennas in the BC band, the bandwidth has occasionally been so narrow that the AM sidebands become attenuated! Not going to see that effect in the amateur bands unless someone is running an antenna only a few feet long!! Correct. This has been observed on my 75M AM mobile signal, with reports of one sideband being attenuated relative to the other. Antenna is a Webster bandpanner (a few feet long). 73, -Larry/NE1S __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [AMRadio] Fw: Antennas
W5OMR (Bigfoot) has been running 75M.A.M. mobile for years down here in TX. Sent me some pics of his present mobile rig, a Johnson Viking II hooked to a honkin' inverter in his Ford F150 truck. Goeff is a hotshot driver, so most of his radio time is mobile. I listen for him every morning on 3.880. Have also talked to Sammy(W5DPP) mobile on A.M., so it's not totally extinct.HI Guess I need to look for an AF-68 or something? AD5HR, Jon p.s. listen for K0CXX, Bill. He has a 20-v3 with Buck Owens' original 1950's audio set-up from his first A.M station in Bakersfield, sounds GREAT. Check him out on QRZ, quite the Collins collector --- On Tue, 6/22/10, Bernie Doran qedconsulta...@embarqmail.com wrote: From: Bernie Doran qedconsulta...@embarqmail.com Subject: [AMRadio] Fw: Antennas To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Date: Tuesday, June 22, 2010, 8:09 PM - Original Message - From: Bernie Doran qedconsulta...@embarqmail.com To: Bernie Doran qedconsulta...@embarqmail.com Sent: Tuesday, June 22, 2010 9:08 PM Subject: Re: [AMRadio] Antennas correct that to read 80 meter MOBILE AM station. see, I am getting old!! - Original Message - From: Bernie Doran qedconsulta...@embarqmail.com To: n...@securespeed.us; Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Tuesday, June 22, 2010 2:25 PM Subject: Re: [AMRadio] Antennas Hi Larry: what a dinosaur!!! you might even be older that I am. I have not heard an 80 AM station since 1950s. but that sure qualifies for a few feet. I wonder if anyone ever thought there was something wrong with their xmtr. bet you could tell them that you are setting it for side band the way TV does!! Bernie - Original Message - From: Larry Szendrei n...@securespeed.us To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Tuesday, June 22, 2010 12:19 PM Subject: Re: [AMRadio] Antennas There have been some interesting cases with short loaded antennas in the BC band, the bandwidth has occasionally been so narrow that the AM sidebands become attenuated! Not going to see that effect in the amateur bands unless someone is running an antenna only a few feet long!! Correct. This has been observed on my 75M AM mobile signal, with reports of one sideband being attenuated relative to the other. Antenna is a Webster bandpanner (a few feet long). 73, -Larry/NE1S -- Pay a visit to my amateur radio web page at: ne1s.rfburn.org __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
