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[TowerTalk] RF Safety Worksheet

 To: [TowerTalk] RF Safety Worksheet k6ll@juno.com (David O. Hachadorian) Thu, 27 Nov 1997 11:45:39 EST
 ```Here is a little worksheet that I made for RF Safety Evaluation. It may look strange on your email reader because of the longish line length, but save it to a file, and then you can edit it. It contains sample data that you can overwrite with your own data. I Just filled out one of these for every band/antenna and used the data as input to the University of Texas Internet RF Safety Calculator. I printed the worksheet and the UTex output sheet for each band/antenna, put them in a binder, and the evaluation is done. Use this worksheet at your own risk. If anyone spots something wrong in this worksheet or method, please let me know. Dave Hachadorian, K6LL K6LL@juno.com Yuma, AZ A. Callsign: AA7AAA B. Frequency, MHz: 21.45 C. Maximum PEP transmitter output, watts: 1500 D. Type of feedline: RG-213 E. Length of feedline, feet: 80 F. Feedline loss, negative dB: -.8 G. Line F divided by 10. (It will be a negative number). -.08 H. PEP power delivered to the antenna: line C antilog line G 1500 ALOG -.08 = 1248 I. Worst case (highest) Emission mode duty factor: .4 FSK, RTTY, AFSK SSB, FM Voice: 1.0 Conversational SSB, heavy speech processing: 0.5 Conversational CW: 0.4 Conversational SSB, no speech processing: 0.2 J. Transmit/Receive duty cycle over six minutes: .5 Longest conceivable percent transmit time in six minutes, expressed as a decimal. K. Transmit/Receive duty cycle over 30 minutes: .5 Longest conceivable percent transmit time in thirty minutes, expressed as a decimal. L. AVERAGE power to antenna, controlled case: H x I x J = 250 M. AVERAGE power to antenna, uncontrolled case: H x I x K = 250 N. Antenna Gain, dBi: 9.5 O. Closest CONTROLLED human proximity to antenna, feet: 46 P. Closest UNCONTROLLED human proximity to antenna, feet: 51 Proceed to the University of Texas World Wide Web Site: http://www.cs.texas.edu/users/kharker/rfsafety Input items L, N, O, B (controlled case). Print the output sheet. Input items M, N, P, B (uncontrolled case). Print the output sheet -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contesting.com Problems: owner-towertalk@contesting.com Search: http://www.contesting.com/km9p/search ```
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