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Path: ...!news.roellig-ltd.de!open-news-network.org!weretis.net!feeder8.news.weretis.net!reader5.news.weretis.net!news.solani.org!.POSTED!not-for-mail From: Jan Panteltje <alien@comet.invalid> Newsgroups: sci.electronics.design Subject: Re: Exploding pagers Date: Mon, 23 Sep 2024 07:29:58 GMT Message-ID: <vcr5dn$ha5d$1@solani.org> References: <vcch5i$3klpd$1@dont-email.me> <vchhpf$k8ao$1@dont-email.me> <b500skx81h.ln2@Telcontar.valinor> <c9erej5emkj85b9r1iau8upkud69hamde6@4ax.com> <vcm368$1hul6$1@dont-email.me> <qdotej9mhi24ec7ullkc213c5nkh4l9ab9@4ax.com> <vcmtp8$1ltam$1@dont-email.me> <78h5skxljq.ln2@Telcontar.valinor> MIME-Version: 1.0 Content-Type: text/plain; ISO-8859-15 Content-Transfer-Encoding: 8bit Injection-Date: Mon, 23 Sep 2024 07:29:59 -0000 (UTC) Injection-Info: solani.org; logging-data="567469"; mail-complaints-to="abuse@news.solani.org" User-Agent: NewsFleX-1.5.7.5 (Linux-5.15.32-v7l+) Cancel-Lock: sha1:nI2zCZDWKfwQhAzak7kslWwALDk= X-Newsreader-location: NewsFleX-1.5.7.5 (c) 'LIGHTSPEED' off line news reader for the Linux platform NewsFleX homepage: http://www.panteltje.nl/panteltje/newsflex/ and ftp download ftp://sunsite.unc.edu/pub/linux/system/news/readers/ X-User-ID: eJwFwYEBwCAIA7CXwNKC5yiT/09YQsjVGaKCw1k9KFiFHqvCuakibu/o5ee8Y7KHz4Cay7ztK03Y6snc+QMoYBRU Bytes: 2975 Lines: 43 On a sunny day (Sun, 22 Sep 2024 15:04:39 +0200) it happened "Carlos E.R." <robin_listas@es.invalid> wrote in <78h5skxljq.ln2@Telcontar.valinor>: >On 2024-09-21 18:55, Clive Arthur wrote: >> On 21/09/2024 16:21, john larkin wrote: >>> On Sat, 21 Sep 2024 10:21:11 +0100, Clive Arthur >>> <clive@nowaytoday.co.uk> wrote: >>> >>>> On 20/09/2024 19:05, john larkin wrote: >>>> >>>> <snip> > >... > >>>> I do wonder how the walkie-talkies were set off. Would they have to >>>> include some GSM circuitry? >>> >>> Just a pager message, probably. >>> >> Do walkie-talkies generally have that facility? > >There is a kind of walkie talkie that works similarly to GSM. They need >repeaters, even a repeater network. > >That way a policeman can talk to any other policeman or fireworker or >ambulance driver in the city, or the entire region. In privacy if >desired. And without fees. > >I don't know the name of the system. Being a radio-ham, I have a Baofeng 2 way radio. At 70 cm wavelength there are several country wide networks. Some need a special code to transmit to it. Baofengs are cheap on ebay. https://www.ebay.com/b/Baofeng/bn_21820271 Not sure which ones have the explosives.. ;-) Mine is still working after many years... https://www.rtlsdr.nl/uhf-repeaters-430-mhz/ you need a license to transmit.. Is also used by truckers like 27 MHz was long ago here... The networks can be used as emergency service if needed. https://www.buytwowayradios.com/blog/2016/08/how_to_manually_program_the_baofeng_uv-5r_from_the_keypad.html There is a lot more to it...