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Date: Sun, 04 Jun 00 15:43:55 MET
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Ham-Digital Digest Sun, 4 Jun 2000 Volume 2000 : Issue 156
Today's Topics:
AEA PK12 with GPS firmware
Callsign hats
help (4 msgs)
Regular Landline Modem Conversion into a TNC Device (2 msgs)
Send Replies or notes for publication to: <Ham-Digital@UCSD.Edu>
Send subscription requests to: <Ham-Digital-REQUEST@UCSD.Edu>
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Archives of past issues of the Ham-Digital Digest are available
(by FTP only) from ftp.UCSD.Edu in directory "mailarchives/ham-digital".
We trust that readers are intelligent enough to realize that all text
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Loop-Detect: Ham-Digital:2000/156
----------------------------------------------------------------------
Date: Sat, 3 Jun 2000 10:14:45 +0100
From: "rob" <cia-agent1@langley-hq.fsnet.co.uk>
Subject: AEA PK12 with GPS firmware
Hi if you would like to see my auction for a AEA PK-12 follow this link
http://cgi.ebay.co.uk/aw-cgi/eBayISAPI.dll?ViewItem&item=347675793
Thanks
------------------------------
Date: Sun, 04 Jun 2000 04:45:28 GMT
From: K5WLS@SpamCop.net (Rick Matthews)
Subject: Callsign hats
<jui@rwi.com> wrote:
>What kind of nerd would where his callsign on his hat.
>
Where his what wear?
------------------------------
Date: Sat, 3 Jun 2000 14:14:38 -0400
From: "Rob" <Pse@NoEmail.Com>
Subject: help
Ten-Tec also makes a PC shortwave receiver box.
see http://www.tentec.com/Amateur.htm
73's
Rob
"shogun" <shogun@cableinet.co.uk> wrote in message
news:cn7_4.3224$p43.413378@news3.cableinet.net...
> can anybody help me.
> is there any softwair avalible that
> will allow me to turn my pc into an
> amateur radio recever. so i can listern in to
> amateur radio on different frequencys
> as i am thinking of trying for my ham radio licence
> and i want to listen in to see what it is all about
> all help will be greatly receved
> thanks for any help.
> john......
>
> P.S please reply to sender
>
>
------------------------------
Date: Sat, 03 Jun 2000 13:04:08 GMT
From: "shogun" <shogun@cableinet.co.uk>
Subject: help
can anybody help me.
is there any softwair avalible that
will allow me to turn my pc into an
amateur radio recever. so i can listern in to
amateur radio on different frequencys
as i am thinking of trying for my ham radio licence
and i want to listen in to see what it is all about
all help will be greatly receved
thanks for any help.
john......
P.S please reply to sender
------------------------------
Date: Sat, 03 Jun 2000 13:15:10 GMT
From: Malenymph@hot.net
Subject: help
On Sat, 03 Jun 2000 13:04:08 GMT, "shogun" <shogun@cableinet.co.uk>
wrote:
>can anybody help me.
>is there any softwair avalible that
>will allow me to turn my pc into an
>amateur radio recever. so i can listern in to
>amateur radio on different frequencys
>as i am thinking of trying for my ham radio licence
>and i want to listen in to see what it is all about
>all help will be greatly receved
>thanks for any help.
>john......
>
>P.S please reply to sender
Buy a shortwave radio capable of Upper and lower sideband reception.
------------------------------
Date: Sat, 03 Jun 2000 10:51:00 -0500
From: W6RCecilA <Cecil.A.Moore@IEEE.org>
Subject: help
shogun wrote:
>
> can anybody help me.
> is there any softwair avalible that
> will allow me to turn my pc into an
> amateur radio recever. so i can listern in to
> amateur radio on different frequencys
> as i am thinking of trying for my ham radio licence
> and i want to listen in to see what it is all about
> all help will be greatly receved
> thanks for any help.
> john......
>
> P.S please reply to sender
ICOM makes a PC receiver box, IC-PCR1000.
--
73, Cecil, W6RCA http://www.mindspring.com/~w6rca
------------------------------
Date: Sat, 3 Jun 2000 10:22:08 GMT
From: nomail@rob.knoware.nl (Rob Janssen)
Subject: Regular Landline Modem Conversion into a TNC Device
Jeremy D. Ward <sonus@adelphia.net> wrote:
>Does anybody know of a way to make a regualar computer modem function as
>an RF modem the only sends data out (similar to a POCSAG system, only at
>a higher bit rate)
>I've managed to convert the modems telephone output to an audio signal
>that goes right into my 2M radio.
>Any software to do such a thing?
With an old V.23 or equivalent FSK modem (Bell-202?) and a special cable
you can use Baycom etc. This will only work when the modem is "dumb", not
when it has Hayes-style AT commands.
Rob
--
+----------------------------------+--------------------------------------+
| Rob Janssen pe1chl@amsat.org | WWW: http://www.knoware.nl/users/rob |
| AMPRnet: rob@pe1chl.ampr.org | AX.25 BBS: PE1CHL@PI8WNO.#UTR.NLD.EU |
+----------------------------------+--------------------------------------+
------------------------------
Date: Sat, 03 Jun 2000 11:56:29 +0300
From: Paul Keinanen <keinanen@sci.fi>
Subject: Regular Landline Modem Conversion into a TNC Device
On Sat, 03 Jun 2000 01:29:13 GMT, "Jeremy D. Ward"
<sonus@adelphia.net> wrote:
>Does anybody know of a way to make a regualar computer modem function as
>an RF modem the only sends data out (similar to a POCSAG system, only at
>a higher bit rate)
Sure you can radiate it, you could even radiate white noise, but what
is the point ? I assume someone is going to receive these messages ?
Receiving is the hard part, not transmitting.
>I've managed to convert the modems telephone output to an audio signal
>that goes right into my 2M radio.
Just set the modem to 4 wire leased line mode and set the speed to
1200 or 2400 bit/s and connect the transmitter to the Tx pair.
However, if you think about 28 or 33 kbit/s then you need a full
duplex connection e.g. use 2 m for one direction and 70 cm in the
opposite direction. During the connection setup phase the modems
_might_ be able to train their equalisers in order to compensate for
the phase and frequency response distortion most radios designed for
speech will introduce. _If_ the training sequence is successful, you
can then send data. If you are only interested in sending data and are
not using error correction, then the returning connection could be
dropped after the training sequence.
However, the modem design expects that the transmission path remains
constant during the connection. On radio paths there are nearly always
some changes in the multipath propagation e.g. due to moving cars in
the street or the trees moving in the wind, so a new training session
is needed, making the connection quite sporadic. This is of course a
strictly point to point connection.
Paul OH3LWR
------------------------------
End of Ham-Digital Digest V2000 #156
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