----- Original Message ----- From: "Richard Fry" <[email protected]> To: <[email protected]> Sent: Saturday, May 05, 2012 6:33 PM Subject: Re: Topband: Fwd: radals fer 160m vertcal
> Carl KM1H wrote [sic]: > >>Ive copied US BCB stations as far inland as Chicago in the far eastern >>Meditaranean. Id be curious what the propagation mode was and if sky wave >>how many hops? > > It certainly wasn't by their ground/surface wave, but their skywave. > > As to how many hops that took, please note that it would take fewer hops > to > produce a useful field intensity downrange for the relatively high fields > radiated by a vertical monopole at very low elevation angles than for the > lower fields radiated toward higher elevation angles, which higher angles > also would require more hops to reach the distant receive site. > > Each multi-hop reflection incurs additional loss, so taken together, this > leads to a conclusion that the best reception results are based on > radiation > from the transmitting antenna at very low elevation angles. While another theory holds that at a common grayline on some paths it is more likely that a high angle lobe enters a duct of some kind and exits at the far end _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
