Re: Topband: GDT's for receive ant's

The PDF that Ken provided is the more comprehensive version of the NCJ article. The attached also discusses some of the design considerations at VP6DX (2008). 73, — Eric K3NA > On Jul 30, 2023, at 12:03, KEN CARUSO wrote: > > Hi Dave, > > I have some design experience for POTS ligh

Re: Topband: AM broadcast multiplexing

even > measured interference levels in my driveway and alas they are within specs. > Shame that I am just too close. I feel bad for one other ham that is about > 150 feet from the ends of that stations radial field!! > > Kind of hoping for the demise of AM broadcasting... > > 7

Re: Topband: 1940 kHz intermod

gt; Fax: 212-625-2894 >> and let them know of your concerns. It is not a small business. . . They >> own 39 stations. >> >> Curious! You did not mention that the program content was in Mandarin or >> Spanish. >> >> CUL, >> >> Jim/VEZ &g

Topband: AM broadcast multiplexing

I found the 4-station site: Tri-County in Sauk Rapids MN: 7 towers, 4 stations, all with different day/night patterns. A report is here with photos. _ Searchable Archives: http://www.contesting.com/_topb

Re: Topband: Spur as it reappeared

To George’s point: This site is definitely in the complex category. Both stations change patterns between day and night, meaning they have a lot of (expensive) phasor hardware and high-current switches. The times when pattern and power level changes must occur are specified in the station lic

Re: Topband: 1940 kHz intermod

Hi Frank, everyone — One does not need another person to be harmed by the intermod on 1940 kHz AM broadcast regulations include a very strict bandwidth mask for any form of radiated spurious signal more than ±75 kHz from the carrier frequency. At these power levels, such spurs must be les

Topband: KM5KG network designer

Grant KM5KG (SK) had a Windows program for impedance matching network design that provided current and voltage levels for each component in the system, based on the power passing through the network to the load, as well as many other useful features for reducing a theoretical design into a pr