Re: Keep VHF Radio Antenna At Least 1 Meter Away From Our Heads?


"Shortwave Sportfishing" <onetwothree@xxxxxxxx> wrote in message
news:id5at11eooqo83qrch580m63rg5hkvlhik@xxxxxxxxxx
> On Mon, 23 Jan 2006 12:40:09 -0500, Sailaway <sailaway@xxxxxxxxxxx>
> wrote:
>
>> >It's like the warnings on bread toasters and TVs that tell you not to
>> >use
>> >the item while showering.
>><jaykchan@xxxxxxxxxxx> wrote in message
>> >news:1137774663.814487.159280@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>>
>> >> Shortwave Sportfishing wrote:
>> >
>> >>>> On 19 Jan 2006 18:18:36 -0800, "jaykchan@xxxxxxxxxxx"
>> >>>> <jaykchan@xxxxxxxxxxx> wrote:
>> >>>>
>> >>
>> >>>>> >I have just received a ICOM fix-mounted VHF radio. To my
>>surprise, its
>> >>>>> >instruction says that I must keep the bottom of the radio antenna
>> >>>>> >at
>> >>>>> >least 1-meter (3.3 feet) away from our heads if the antenna is
>>mounted
>> >>>>> >in a small boat. I have never heard this before. Is this for
>> >>>>> >real?
>> >>
>> >>>>
>> >>>> yes.
>> >>>>
>> >>
>> >>>>> >Does this have something to do with strong radio frequency may
>>boil our
>> >>>>> >brain or cause cancer?
>> >>
>> >>>>
>> >>>> not cancer - the brain boil thing. turns it to mush at 25 watts.
>> >>>> its
>> >>>> why i wander around with this blank look on my face.
>> >>>>
>> >>
>> >>>>> >Does this restriction also apply to 3dB antenna?
>> >>
>> >>>>
>> >>>> all antennas - including car radio antennas, portable radio
>> >>>> antennas -
>> >>>> anything that has an antenna.
>> >>>>
>> >>
>> >>>>> >Does this mean that I need to use an extension to keep the
>> >>>>> >radio antenna further away from our heads?
>> >>
>> >>>>
>> >>>> at least three feet - further away is better. its best to put the
>> >>>> antenna on a mast at least three feet tall - ten feet tall is the
>> >>>> best.
>> >>>>
>> >>
>> >>>>> >Thanks in advance for any info about this "unexpected"
>> >>>>> >restriction.
>> >>
>> >>>>
>> >>>> there is no direct evidence that radio waves cause cancer or boil
>> >>>> your
>> >>>> brain. there is anecdotal evidence, but it has to be very high
>> >>>> power
>> >>>> - like in the megawatts - at the marine radio frequency.
>> >>>>
>> >>>> put your antenna where its easy for you to raise and lower and dont
>> >>>> worry about that stupid - rule - its legal beagles being legal and
>> >>>> stuff.
>> >
>> >>
>> >> Thanks for clarifying this issue to me. Sound like this is not a
>> >> "real" issue for a VHF radio that only uses up to 25 watt.
>> >>
>> >> Jay Chan
>> >>
>>
>>I spent 17 years as a military electronics tech working on
>>communications and nav equipment, with much experience in VHF. During
>>that time, I was required to submit to various regular periodic medical
>>tests and exams including extensive eye exams due to my exposure to RF
>>radiation. And I only worked with low-power radios and terminated all
>>power output into loads when transmitting on the bench - I never had an
>>antenna next to my head. There is an enormous body of research as well
>>as plenty of anecdotal evidence of specific damage to body and brain
>>tissue from various frequencies. Anyone who tells you that RF radiation
>>- any RF radiation in close proximity, isn't harmful is uninformed. That
>>doesn't mean you are going to get cancer or fry your brain from your
>>vhf, but a little caution certainly doesn't hurt. BTW, the most rapid
>>deterioration in my eyesight was during the period I worked more with
>>comm radio transmitters.
>
> prove it.
>
> ive been a ham for 48 years with a career in radar and vhf engineering
> - ive had more antennas next to my head than youve ever seen.
>
> again, prove it.

My last job was designing RF cookers for the human body. So you can harm
the flesh with RF. We used contact electrodes to get the energy in to the
body. Used RF as the body's nervous system does not know it is getting
electrocuted via RF.


.

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