Comparison of UHF Antenna Types - Part 1 - Choices, Mail, Internet options.
R.F. items from the 1995 World Media Expo/SBE in New Orleans: ENG Safety!, Underwriters' Laboratories (UL) listings for transmitters?, Effect of towers on side mounted UHF slot antennas - Harris, 8-VSB HDTV signal Under Non-Linear Amplification - Harris, Dealing with IOT Arcs with HV Crowbars - Larcan / TTC (see correction in Feb 96 column), PS*2 HV supply eliminates need for HV crowbars - Comark, 60 KW UHF Diacrode has no need for 30 KV supplies - Acrodyne; Acrodyne 60 KW Diacrode transmitter passes 24 hour full load test; RF Web Page changes and updates.
Tips on installing and maintaining UHF klystron low voltage pulsers; FCC changes the rules on satellite uplink operations; FCC requests comments on ATV proceeding, changes timetable.
Review of the Broadcasters' ATV proposed channel allocation plan; Transmitter implications for TV broadcasters under the plan; UHF TV transmitter harmonics may pose a problem for GPS and PCS!; Acrodyne Diacrode screen overload solved - it wasn't the tube!; News from MicroCommunications and Varian Associates, Inc.
Acrodyne Au60D 60KW Diacrode transmitter - Comprehensive tests!, Avoiding transient problems in transmitter remote controls: "Cheap Remote" enhancements using the Micro-485, RS-232 serial port isolation, UPS's and Surge Protectors; Update on the ITS-830 1 KW Solid state UHF transmitter; Announcements: RF Page debuts, RF Column program disks discontinued
RF FTP Site announcement (you're there!), How to access FTP sites using Web browers, Changes at the FCC Web Site, sci.engr.television.broadcast USENET newsgroup debuts, NAB 95 - Comments on reflections & HDTV Coverage, Comparision: ITS-830 & Acrodyne TLU-1KE 1KW UHF transmitters.
Editorial on ADTV - Keep it flexible! Comments and summary of ADTV sessions at NAB 95. Transmission equipment at NAB 95: Comark's Innovative PS-Squared power supply kills arcs, cuts size, reduces cost. Acrodyne & Thomson show Diacrode - 60 KW tube the size of a lawn mower tire! Higher power from solid state transmitters. Update on Internet providers. Interesting Web Sites for RF Column readers.
(I didn't have time to do a column for May) - Review of "The ARRL UHF/Microwave Experimenter's Handbook". Editorial - No future for analog TV? Competition from the 'Net. How to find a company on the World Wide Web. Big list of interesting Web Sites.
March 1995 - Building a path Calculation spreadsheet (download the files here). Shopping for a transmitter at NAB 95 - Tips for buyers. More transmitter tube life survey results. How to get connected to the Internet - the easiest & cheapest methods.
RF Path Analysis - Calculating Fresnel Zone Clearance. UHF Tetrode tube life survey results from Bill Barrow. FCC & Intelsat World Wide Web sites.
SBE "World Media Expo" Los Angeles 1994 - session reports: RF radiation effects -- are they in your head? Broadcasters' auxiliary spectrum squeezed. Other items: I.T.S. ITS-830 1 KW UHF transmitter review. Transmitter tube life survey - tetrodes & klystons. I.O.T. problems and solutions.
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