From: Jonathan Kirwan
Subject: Re: old cellphone reuse/salvage and schematics/tech info?
X-Newsreader: Forte Agent 1.92/32.572
NNTP-Posting-Date: Sun, 05 Jan 2003 07:44:11 GMT
Organization: AT&T Broadband
Date: Sun, 05 Jan 2003 07:44:11 GMT
On 5 Jan 2003 03:21:11 GMT, et472@FreeNet.Carleton.CA (Michael
>Spehro Pefhany (email@example.com) writes:
>> On Sat, 04 Jan 2003 13:18:45 -0500, the renowned "Smile, it can only
>> get WORSE" wrote:
>>>Has anyone hacked into these and published any information on using
>>>them for alternative purposes???? Or gaining control of these things
>>>in service mode? Does anyone deal in Service Manuals for these
>> Not very exciting, but you can salvage a pager motor out of
>> most of them. They also have a very accurate temperature-compensated
>But they are also a source of other interesting radio parts. IF filters,
>usually at exotically high frequencies (and crystals that convert
>those IFs to 455KHz, complete FM IF strips for that matter, frequency
>prescalers, diode double balanced mixers, synthesizer ICs of various kinds,
>sometimes interesting RF transistors, and sundry other parts. For that
>matter, I have more than enough NE570 companders because I've stripped
>cellphones. Except that they are often oddly shaped, cellphones supply
>nice metal cases.
>Of course, I'm referring to older and bulkier phones, when the components
>were nice and big, and just as important standard and not too integrated.
>I've bought them for fifty cents to five dollars (I think that's my limit)
>at garage and rummage sales, and if it's old and bulky and you want RF parts
>they are worth the money.
>I can't say the same thing for more recent ones. Certainly hand held
>cellphones yield increasingly fewer parts. I got a recent one for
>fifty cents, and there was virtually nothing that I could recognize
>inside. Another one at least had a recognizable first IF filter.
The newer color LCD displays might be interesting to salvage out
for some projects.