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1994-06-04
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Date: Mon, 21 Mar 94 04:30:17 PST
From: Ham-Ant Mailing List and Newsgroup <ham-ant@ucsd.edu>
Errors-To: Ham-Ant-Errors@UCSD.Edu
Reply-To: Ham-Ant@UCSD.Edu
Precedence: Bulk
Subject: Ham-Ant Digest V94 #74
To: Ham-Ant
Ham-Ant Digest Mon, 21 Mar 94 Volume 94 : Issue 74
Today's Topics:
CELLULAR PHONES-How increment reception?
Send Replies or notes for publication to: <Ham-Ant@UCSD.Edu>
Send subscription requests to: <Ham-Ant-REQUEST@UCSD.Edu>
Problems you can't solve otherwise to brian@ucsd.edu.
Archives of past issues of the Ham-Ant Digest are available
(by FTP only) from UCSD.Edu in directory "mailarchives/ham-ant".
We trust that readers are intelligent enough to realize that all text
herein consists of personal comments and does not represent the official
policies or positions of any party. Your mileage may vary. So there.
----------------------------------------------------------------------
Date: 20 Mar 1994 11:41:02 -0500
From: hp81.prod.aol.net!search01.news.aol.com!not-for-mail@uunet.uu.net
Subject: CELLULAR PHONES-How increment reception?
To: ham-ant@ucsd.edu
Well, you don't give too much information on what your exact situation is, but
I'll assume:
1. You have a portable (hand-held) phone
2. The problem is that the cell site can't hear you, and not the other way
around.
Issue 2 is the real question: when you activate the signal strength indicator
on your phone, how many "bars" (or whatever) light up? It's most likely that
you can hear the setup channels from the cell site, but on the reverse path
(portable to cell) the site receiver can't pick you out.
Portable phones only have 0.6W of maximum output power; mobile (car phones) are
3W.
If your phone is a portable, about the only thing you can do is (1) raise
transmit power or (2) improve antenna (any other "big" solution eliminates the
portability of your phone). Either of these are technically possible but I
can't say that I know of an accessory manufacturer that makes hi-power
portables or high-gain portable antennas.
The problem with increasing transmit power is that your already short-lived
battery will really dissipate rapidly at the 3W output level.
A higher gain antenna (similar to the coil-loaded jobs on cars) would help, but
mechanically mating it to the portable would be a problem. The older Motorola
series 8000-9000 phones would be easy, but the newer flip phones would be
almost impossible.
So in a nutshell: you're probably out of luck!
------------------------------
End of Ham-Ant Digest V94 #74
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