[Boatanchors] Safe radiation question
Glen Zook
gzook at yahoo.com
Sat Feb 16 19:33:10 EST 2019
Go to:
http://hintlink.com/power_density.htm
then enter the information.
Make sure you read how to calculate the actual power. For example, SSB is only 20% of the peak power and CW is only 40% of the peak power.
The outbacker antenna will have, at best, 0 dBi gain.
The calculations will give you the minimum distance from the antenna for a controlled area (where you are) and an uncontrolled area which would be for your neighbors' houses.
Doing the calculations for you, with the output from the TS-830S being 100-watts.
How close to the antenna you could be for continuous operation:
For 80 / 75 meters: SSB = 3.7-INCHES, CW = 5-inches
For 40-meters: SSB = 6.5-Inches, CW = 8.9-inches
For 20-meters: SSB = 12.33-inches, CW = 17.2-inches
For a "normal" QSO where you are transmitting 50% of the time and receiving 50% of the time:
For 80 / 75-meters: SSB = 2.8-inches, CW = 3.7-inches
For 40-meters: SSB = 4.75-inches, CW = 6.5-inches
For 20-meters: SSB = 8.9-inches, CW 12.33-inches
The truth be known, the calculations are based on FCC / OSHA guidelines which are VERY conservative. Basically, you could get a lot closer to the antenna and not be harmed. All that you really need to be is far enough not to get an r.f. burn and that would require almost touching the antenna if not actually touching the antenna.
Glen, K9STH
Website: http://k9sth.net
From: Ken Kaplan <krkaplan at cox.net>
To: boatanchors at mailman.qth.net
Sent: Saturday, February 16, 2019 5:59 PM
Subject: [Boatanchors] Safe radiation question
I'm wondering just how close one should be to an antenna on 80-40-20?
Rig is a Kenwood TS-830S. I tried a Google search but couldn't seem to
find anything conclusive. I'm aware of some of the issues with much
higher frequencies including the debate on cell phone usage so close to
ones head. HF - I don't know. I'm thinking of using an Outbacker on a
tripod in the same room. The antenna would be about 6 feet away. Don't
do it?
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