On Fri, 09 Dec 2022 12:28:16 -0600, AMuzi <am@yellowjersey.org> wrote:

>I'm generally ignorant about mobile telephones but weren't
>the 1980s models essentially like a marine radio (analog not
>digital) ?

Yes. Both marine and cellular used FM modulation. The difference
(besides the frequency, power output, channel hopping, etc) was that
cellular allowed the cell site to control the handset offering such
features as selective calling (ringing the phone). Think of cellular
as a marine radio with plenty of control features added on.

>I seriously considered one about 1988 but
>couldn't justify the cost. Are the frequencies the same as
>modern cell telephones?

Totally different frequencies, power output, automation, and
performance specs. It's really difficult to provide the number of
channels available for marine and cellular. For marine, there are 88
channels but each country has their own channel allocations. Cellular
is really a mess, with different organizations by country, cellular
provider, modulation method, data specs, etc. Newer phones offer more
frequencies, channels, and features. Meanwhile, marine radio has
turned some of the existing channels into specialized channels
(paging, weather, automation, etc) but little other changes.
Meanwhile, cellular upgrades to the latest generation technology. It's
really hard to compare marine and cellular (almost like apples and
oranges).

--
Jeff Liebermann jeffl@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558

On Friday, December 9, 2022 at 11:39:17 AM UTC-8, Andre Jute wrote:
> On Friday, December 9, 2022 at 6:28:16 PM UTC, AMuzi wrote:
> > On 12/9/2022 12:09 PM, Jeff Liebermann wrote:
> > > On Fri, 9 Dec 2022 07:48:01 -0800 (PST), Tom Kunich
> > > <cycl...@gmail.com> wrote:
> > >
> > >> It isn't clear to me why some people are so short lived while
> > >> other seem to live forever. Of course the long term effects
> > >> of the covid-19 vaccination are yet to be felt.
> > >
> > > Among my useless activities, I was involved in various RF exposure
> > > debates and a little research. Some old examples:
> > > <http://www.learnbydestroying.com/jeffl/crud/Cellular%20and%20cancer.pdf>
> > > <http://www.learnbydestroying.com/jeffl/crud/brain-CNS-cancer.jpg>
> > > <http://www.learnbydestroying.com/jeffl/crud/brain-CNS-cancer-by-age-1992-2006.jpg>
> > >
> > > Over the years, the proponents of "cell phones cause brain cancer"
> > > were having a difficult time demonstrating a connection between cell
> > > phone use and brain cancer. So, they adopted the mantra that it takes
> > > a long time between exposure and when the cancer is found. Of course,
> > > no details such as how long a delay were provided. We're now almost
> > > 40 years after the huge increase in cell phone use after about 1983,
> > > and no hint of a cancer epidemic in sight.
> > >
> > > You might find yourself in the same situation with your Covid-19
> > > vaccination theory.
> > >
> > I'm generally ignorant about mobile telephones but weren't
> > the 1980s models essentially like a marine radio (analog not
> > digital) ? I seriously considered one about 1988 but
> > couldn't justify the cost. Are the frequencies the same as
> > modern cell telephones?
> > --
> > Andrew Muzi
> > <www.yellowjersey.org/>
> > Open every day since 1 April, 1971
> >
> Trivia: Those 1980s Mitsubishi "mobile" phones with the long whip aerial and the hefty weight had a long, long afterlife as "legal" weapons for chuckers-out at night clubs; they were indestructible. I knew a chap who dropped out of college to fix those phones, and for years made a good living at it, so that the bruisers could go to court and claim they used them as phones, not primarily as weapons at the end of the aerial. He charged two hundred bucks to go to court and give the phone a character reference!
> >
> I had one of those Mitsubishi phones on my bike, for emergencies, but one day my technical representative in NY called me on it as i was riding my bike in the countryside, to tell me, "Hey, I'm out jogging in Central Park and I hope you're taking your exercise, because if you die, Warner will sue me." I said, "This is my quiet time, asshole," and threw the phone into a convenient stream -- that's the great thing about Ireland, there's always a stream to hand to throw some irritating modern appliance into. The phone was fished out by some luck farmhand, and fixed by the fellow I knew, who called me to ask if my phone was stolen because he found my name on the inside of the cover.
> >
> Andre Jute
> Did I say "indestructible"? Those phones had the half-life of a nuclear Lucifer.

I'm sure that Liebermann will post that you couldn't have talked to someone in Central Park NYC with a long wave phone because after all, he is an expert on anything he thinks he can find on Google.

https://www.israelunwired.com/the-frightening-truth-about-google-search/ This is where Liebermann gets all of his information. He has decided a long long time ago that the religion of his family is evil beyond comprehension.

On Friday, December 9, 2022 at 1:41:32 PM UTC-5, cycl...@gmail.com wrote:
> My work in Cancer including using focused radio waves to destroy tumors

HAH!!! Another good one sparky! Thanks, I needed a laugh today.

On Friday, December 9, 2022 at 3:46:42 PM UTC-5, jeff.li...@gmail.com wrote:
> On Fri, 09 Dec 2022 12:28:16 -0600, AMuzi <a...@yellowjersey.org> wrote:
>
> >I'm generally ignorant about mobile telephones but weren't
> >the 1980s models essentially like a marine radio (analog not
> >digital) ?
> Yes. Both marine and cellular used FM modulation. The difference
> (besides the frequency, power output, channel hopping, etc) was that
> cellular allowed the cell site to control the handset offering such
> features as selective calling (ringing the phone). Think of cellular
> as a marine radio with plenty of control features added on.
> >I seriously considered one about 1988 but
> >couldn't justify the cost. Are the frequencies the same as
> >modern cell telephones?
> Totally different frequencies, power output, automation, and
> performance specs. It's really difficult to provide the number of
> channels available for marine and cellular. For marine, there are 88
> channels but each country has their own channel allocations. Cellular
> is really a mess, with different organizations by country, cellular
> provider, modulation method, data specs, etc. Newer phones offer more
> frequencies, channels, and features. Meanwhile, marine radio has
> turned some of the existing channels into specialized channels
> (paging, weather, automation, etc) but little other changes.
> Meanwhile, cellular upgrades to the latest generation technology. It's
> really hard to compare marine and cellular (almost like apples and
> oranges).
>

I did a few FCC certifications on intentional radiators for bodyworn applications about 15 years ago, mostly police band 150 to 175 MHz analog FM, but one application was a 2.4 GHz spread spectrum digital video bodyworn camera. One thing a lot of people aren't aware of are the SAR requirements for hand-held/bodyworn devices, which vary by frequency.

https://www.law.cornell.edu/cfr/text/47/1.1310