There is still no commercially-available equipment for the 902 MHz amateur
band that I am aware of.

Using commercially-available equipment is cheating anyway. What does it
take to modify PCS cellular phone firmware for digital communication on
902? Is it just a matter of firmware or isn't the RF section able to tune
that far out of band?

Think of it this way. When you have an FM broadcast antenna and transmitter, it
makes quite a difference when switching within the same band from 88 Mhz to 100
Mhz. (only 12 Mhz)

Now you want to take something from around 850 Mhz to 902 Mhz (52 Mhz
difference)

Plus the higher up you go, the more critical the circuitry. Even in the 440
band you are already dealing with microsurgery when using the miniature surface
mount components.

Besides, working with microwaves is never a good idea. Might as well just take
up smoking cigarettes instead.

I would play with mercury and use lead paint in my home no problem, but I would
not ever build a transmitter and use microwave frequencies.

Go to http://tx.mb21.co.uk/gallery/ and look at some of their AM/MW
sites. Not only do many of them still use those cool T-shaped
horizontal wire antennas, but in some shots you can see sheep grazing in
the fields very close by. The RF foes in the USA should consult with
veterinarians in the UK and see what their research comes up with

GTT




Truth wrote:
Yes, but researchers can also sift through 80 years of public health
records. The people who have, or had, leukemia are known. It shouldn't be
hard to find out who lived near a radio transmitter and for how long. It
might be interesting to ask veterinarians about animal leukemia, since many
transmitters are located in rural areas.

(snip)

"Truth" wrote in message ...
On the other hand, the FM signal is radiated from an antenna atop the
tower. Stand at the base of a 300' FM tower, and you're 300' from the
thing that radiates.

This is the same theory in which people claim using their cell phones are
safe,
because the power they put out is so low.

They are powerful enough to transmit to cell towers miles away!

and that proves? ... nothing


Now put that
power inches from your head and how more concentrated is that power?



why not look it up?

you will find that a 5 watt transmitter operating on 450 MHz with a 1/4 wave
antenna might produce enough heating to damage the cornea of the eye IF the
tip is placed within one CM of the eye.

"Truth" wrote in message ...
On the other hand, the FM signal is radiated from an antenna atop the
tower. Stand at the base of a 300' FM tower, and you're 300' from the
thing that radiates.

This is the same theory in which people claim using their cell phones are
safe,
because the power they put out is so low.

They are powerful enough to transmit to cell towers miles away! Now
put that
power inches from your head and how more concentrated is that power?

In rec.radio.shortwave Truth wrote:
I don't doubt that high levels of RF can be dangerous. The first two chief
engineers I worked with both died of cancer in their 50s.

Wouldn't FM broadcast antennas be an even greater concern? The height of
most adults would make them resonant somewhere near, or in, the FM broadcast
band.

Comparing wavelengths of "people" based on their height is ridiculous.
Microwaves are a much shorter wavelength and cause much more damage to the human
body, so the wavelength of people based on their height theory needs to be
thrown out right away.

To oversimplify a bit: Low frequencies (like AM broadcast) pass through
the body without being absorbed. Microwave frequencies bounce off the body
without being absorbed. It's the frequency range between 30 and 300 MHz
where maximum absorption takes place.

Art H.

"Truth" wrote in message ...
There is still no commercially-available equipment for the 902 MHz
amateur
band that I am aware of.

Using commercially-available equipment is cheating anyway. What does it
take to modify PCS cellular phone firmware for digital communication on
902? Is it just a matter of firmware or isn't the RF section able to
tune
that far out of band?

Think of it this way. When you have an FM broadcast antenna and
transmitter, it
makes quite a difference when switching within the same band from 88 Mhz
to 100
Mhz. (only 12 Mhz)

Now you want to take something from around 850 Mhz to 902 Mhz (52 Mhz
difference)

yes but 88 to 100 = 12 percent of final freq

850 to 902 is only 5.765 per cent



Plus the higher up you go, the more critical the circuitry. Even in
the 440
band you are already dealing with microsurgery when using the miniature
surface
mount components.

Besides, working with microwaves is never a good idea. Might as well
just take
up smoking cigarettes instead.

I would play with mercury and use lead paint in my home no problem, but I
would
not ever build a transmitter and use microwave frequencies.

"Truth" wrote in message ...
There is still no commercially-available equipment for the 902 MHz
amateur
band that I am aware of.

Using commercially-available equipment is cheating anyway. What does it
take to modify PCS cellular phone firmware for digital communication on
902? Is it just a matter of firmware or isn't the RF section able to
tune
that far out of band?

Think of it this way. When you have an FM broadcast antenna and
transmitter, it
makes quite a difference when switching within the same band from 88 Mhz
to 100
Mhz. (only 12 Mhz)

Now you want to take something from around 850 Mhz to 902 Mhz (52 Mhz
difference)

Plus the higher up you go, the more critical the circuitry. Even in
the 440
band you are already dealing with microsurgery when using the miniature
surface
mount components.

pretty might the same for all hand held electronics these days


Besides, working with microwaves is never a good idea.

everyone has to have a hobby... 900 MHz are NOT microwaves (we call it
microwave in brroadcast, but it is a slang term for high UHF)

Might as well just take
up smoking cigarettes instead.

I would play with mercury and use lead paint in my home no problem, but I
would
not ever build a transmitter and use microwave frequencies.


gunplexers are friendly... bi-directional line-of-sight audio

Using commercially-available equipment is cheating anyway. What does it
take to modify PCS cellular phone firmware for digital communication on
902? Is it just a matter of firmware or isn't the RF section able to tune
that far out of band?

At the time, cell phone equipment was not readily available.

To oversimplify a bit: Low frequencies (like AM broadcast) pass through
the body without being absorbed. Microwave frequencies bounce off the body
without being absorbed.

ROTFFL!!!

Why not PROVE your ridiculous theory by putting your head into a microwave oven!

........yeah. I didn't think so.

Within these hallowed halls, Truth of added the
following to the collective conscience:
To oversimplify a bit: Low frequencies (like AM broadcast) pass
through the body without being absorbed. Microwave frequencies
bounce off the body without being absorbed.

ROTFFL!!!

Why not PROVE your ridiculous theory by putting your head into a
microwave oven!

.......yeah. I didn't think so.

I was actually wondering what this post of yours had to do with
broadcasting. Even if
it was off topic but informative or entertaining, it would have been better
than just
being a post about being rude to someone.