Path: ...!3.eu.feeder.erje.net!feeder.erje.net!news2.arglkargh.de!news.karotte.org!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From: "Carlos E.R." <robin_listas@es.invalid>
Newsgroups: sci.electronics.design
Subject: Re: AM radio law opposed by tech and auto industries is close to
 passing
Date: Sat, 4 May 2024 22:29:46 +0200
Lines: 53
Message-ID: <qeiigkxl4q.ln2@Telcontar.valinor>
References: <v0v81o$96oj$1@solani.org> <kdobgkxras.ln2@Telcontar.valinor>
 <v10ps4$1dj7$2@dont-email.me> <nuehgkxbe5.ln2@Telcontar.valinor>
 <v152uo$15khh$1@dont-email.me>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
X-Trace: individual.net 5iK1Y3N90thJ64uFnmzm9AgJRpeEOKJYLUHRYkFmchrljvUdZF
X-Orig-Path: Telcontar.valinor!not-for-mail
Cancel-Lock: sha1:SmYAiV3b3Xgz78RgAPeGmfE9aw0= sha256:oJ9JRIb7V/eui2Uy8YQmCAW6TtuUhRFY2W4InTE5dPQ=
User-Agent: Mozilla Thunderbird
Content-Language: es-ES, en-CA
In-Reply-To: <v152uo$15khh$1@dont-email.me>
Bytes: 3308

On 2024-05-04 12:33, Don Y wrote:
> On 5/4/2024 3:23 AM, Carlos E.R. wrote:
>> On 2024-05-02 21:34, Don Y wrote:
>>> You can legislate requirements for broadcasters (as a condition of
>>> granting them use of the air waves) mandating they "conduct periodic
>>> tests of (an) emergency broadcast capability".  But, you are ultimately
>>> reliant on them to maintain that capability, despite any pressure on
>>> profits, etc.
>>>
>>> We routinely lose TV reception due to outages on the mountain (where
>>> most of the transmitters are located).  Imagine the consequences of
>>> an earthquake or wildfire in areas where transmitters (or repeaters)
>>> are located.  Or, hurricane, tornado, flood, etc.
>>>
>>> Not everyone owns a cell phone -- or keeps it ON for the convenience
>>> of CALLERS!  The same can be said of all broadcast media (do I have
>>> to keep a radio/TV ON 24/7/365 "just in case"?
>>
>> The cell network is very vulnerable to disasters, you can not rely on it.
> 
> Especially if the disaster is "local" to the folks you want to inform.

Or takes out the exchange, which controls a large region. Depending on 
the population, 50 to 500 Km radius, I think.

> 
>>> AM radio can be leveraged for wide area coverage without requiring
>>> lots of other technology to keep it operational.  And, the receivers
>>> can run for long periods of time on batteries (that are likely
>>> stale) or clock-spring mechanisms (emergency radios).
>>
>> I have seen radios with a hand spun dynamo.
> 
> I have one with a clockwork mechanism -- wind up a large spring and
> it drives a small "generator" as it unwinds.  It takes about 5 minutes
> to unwind completely so it's a relatively low "winding" duty cycle.
> 
> But, it is large-ish.
> 
> It also has solar cells and a small, internal battery (which is toast;
> but, attempting to disassemble it to replace the battery would likely
> result in a mess of gears and torsion spring parts!)  As the spring 
> mechanism
> will run the radio despite the bad battery, it seems a safer plan to just
> tolerate the bad battery!

That's a bad design, that the battery of such a thing can not be 
replaced "easily".


-- 
Cheers, Carlos.