Fred, et al: The General Electric Datafile Bulletin 10003-1 is available for download here:
<www.repeater-builder.com/ge/datafile-bulletin/df-10003-01.pdf> These two files are also needed to perform the calculations: <www.repeater-builder.com/ge/datafile-bulletin/df-10003-03.pdf> <www.repeater-builder.com/ge/datafile-bulletin/ecp-159.pdf> 73, Eric Lemmon WB6FLY -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Fred Seamans Sent: Thursday, August 30, 2007 6:11 AM To: [email protected] Subject: Re: [Repeater-Builder] Re: Repeater Range : Estimate Program Available To All Interested: I would invite you attention to a paper presented by Kenneth Bullington, "Radio Propagation at Frequencies Above 30 Meagcycles" in the October 1947 Proceedings of the I.R.E. - Waves and Electronics Section. Most all radio propagation prediction methods over the years have been based on the findings of his research for this paper. A GE Mobile Radio Data File Bulletin (10003-1), "VHF and UHF Propagation", was published in July 1962 for use by engineers and technicians for the prediction of radio coverage. Along with this bulletin a hard paper/plastic slide rule was manufactured by GE for its sales personnel to predict radio coverage. Motorola sales people liked to get a hold of it and use it also; "Range and Signal Strength Calculator for 2 Way Radio".There was a second version put together by GE in 1977; "Range and Transmitter Power Calculator". If you can find them, either of these slide rules can give adequate results with radio range calculations. With the general usage of computers in the 1980's many propagation programs appeared on the market, some use digitized USGA maps while others take a more simplistic approach. You get what you pay for! This Data File may be available on line, I am not sure if it is. Fred W5VAY
