Re: [IRCA] Local ham beacons on LW
I wonder what kind of antennas they're using. A quarter wavelength on 470 kHz (my wavelength conversion spreadsheet is in MHz and won't do three decimal places) is 523.23 feet. Dennis - we both use inverted L's with a small ground radial system. The antenna is brought to resonance with a large loading coil at the base and then impedance matched to 50 ohms and then back to the transmitter. At this frequency backyard-sized antennas are very inefficient but thanks to RF loving to radiate, it is surprising what can be achieved with a even a small installation. Steve / 73 WEB - "The VE7SL Radio Notebook": http://members.shaw.ca/ve7sl VE7SL BLOG - "Homebrewing and Operating Adventures From 2200m to Nanowaves": http://ve7sl.blogspot.ca/ ___ IRCA mailing list IRCA@hard-core-dx.com http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: irca@hard-core-dx.com
Re: [IRCA] Local ham beacons on LW
I QSLed the VE7BDQ beacon a couple of years ago, except he was using the call VX9BDQ on 504.1 kHz. At that time, he was running 100 watts into an inverted L but didn't give the dimensions. He told me he'd also gotten listener reports from Alaska, Hawaii and Texas, so the beacon is a potential catch in sufficiently quiet locations. Bruce On 7/12/2014 22:51, Dennis Gibson wrote: I wonder what kind of antennas they're using. A quarter wavelength on 470 kHz (my wavelength conversion spreadsheet is in MHz and won't do three decimal places) is 523.23 feet. Sent from my iPhone On Jul 12, 2014, at 10:41 PM, coffee_canuck wrote: Hearing VE7BDQ and VE7SL/b on 473 and 474 KHz. 1st time I've heard ham radio on Long Wave band! Cool! Thanks for tip. Colin in Victoria. ___ IRCA mailing list IRCA@hard-core-dx.com http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: irca@hard-core-dx.com
Re: [IRCA] Local ham beacons on LW
I wonder what kind of antennas they're using. A quarter wavelength on 470 kHz (my wavelength conversion spreadsheet is in MHz and won't do three decimal places) is 523.23 feet. Sent from my iPhone > On Jul 12, 2014, at 10:41 PM, coffee_canuck wrote: > > Hearing VE7BDQ and VE7SL/b on 473 and 474 KHz. 1st time I've heard ham radio > on Long Wave band! Cool! Thanks for tip. > > Colin in Victoria. > ___ > IRCA mailing list > IRCA@hard-core-dx.com > http://montreal.kotalampi.com/mailman/listinfo/irca > > Opinions expressed in messages on this mailing list are those of the original > contributors and do not necessarily reflect the opinion of the IRCA, its > editors, publishing staff, or officers > > For more information: http://www.ircaonline.org > > To Post a message: irca@hard-core-dx.com > ___ IRCA mailing list IRCA@hard-core-dx.com http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: irca@hard-core-dx.com
[IRCA] Local ham beacons on LW
Hearing VE7BDQ and VE7SL/b on 473 and 474 KHz. 1st time I've heard ham radio on Long Wave band! Cool! Thanks for tip. Colin in Victoria. ___ IRCA mailing list IRCA@hard-core-dx.com http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: irca@hard-core-dx.com
