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PA2AGA > HDDIG 18.06.00 14:26l 209 Lines 7130 Bytes #-9439 (0) @ EU
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From: PA2AGA@PI8HGL.#ZH1.NLD.EU
To : HDDIG@EU
Date: Sun, 18 Jun 00 00:19:48 MET
Message-Id: <hd_2000_168A>
From: pa2aga@pe1mvx.ampr.org
To: hd_broadcast@pa2aga.ampr.org
X-BBS-Msg-Type: B
Ham-Digital Digest Sat, 17 Jun 2000 Volume 2000 : Issue 168
Today's Topics:
2 meter PSK31
Airmail2000 question
Hottest and fastest HF mode (3 msgs)
More on WinLink. (2 msgs)
N0ZO no longer supports Keyboard inputs!
Packet Radio (8 msgs)
PSK31 for FD?? (2 msgs)
PTC-II and IIe data controllers, and PTC-III to come! (2 msgs)
Scanner Dweeb comic update (Episode 68)
Website advocates MP3.com boycott
Who's using a Palm pilot for amateur radio? (2 msgs)
Send Replies or notes for publication to: <Ham-Digital@UCSD.Edu>
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Problems you can't solve otherwise to brian@ucsd.edu.
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
herein consists of personal comments and does not represent the official
policies or positions of any party. Your mileage may vary. So there.
Loop-Detect: Ham-Digital:2000/168
----------------------------------------------------------------------
Date: Fri, 16 Jun 2000 08:49:16 +0100
From: Roger Basford <Roger@g3vkm.demon.co.uk>
Subject: 2 meter PSK31
In article <394955A8.438FA317@IEEE.org>, W6RCecilA
<Cecil.A.Moore@IEEE.org> writes
>Darren Ream wrote:
>> Amazingly, on PSK31 we were able to copy 100%!
>
>Not amazing at all, considering line of sight VHF transmissions
>have very little phase shift from external causes.
I did a couple of tests on 2m PSK31 last year over a path of about 80
miles and noticed that the main source of phase shift was aircraft
reflections, otherwise it's a good mode for VHF. The aircraft echoes
appeared as an interfering signal which drifted across the operating
frequency and then moved away.
I agree with the other poster about rig drift, a local PSK31 station on
2m using an FT902DM plus a solid-state transverter drifted nearly 500Hz
in the course of a half hour QSO! The same rig (without the transverter
of course) was rock steady on 80m.
Roger Basford, G3VKM
------------------------------
Date: Sat, 17 Jun 2000 08:52:50 GMT
From: n0zo@lcia.com (Pat McKeeby)
Subject: Airmail2000 question
Jerry, on the same site that you downloaded the software is a fairly
full explanation on what it does. Install the software, there is also
documentation in that. AirMail does operate with a KAM providing
it has HF capabilities.
Regards/Pat
On Thu, 15 Jun 2000 01:03:13 GMT, "Mike Pupeza"
<michael.pupeza@sympatico.ca> wrote:
>Read More,
>Send Less,
>AND it may come clearer!
>
>Give us a break!
>Trolling is not nice!
>Mike VE3EQP
><k7lgm@yahoo.com> wrote in message
>news:39481244.24767521@news1.attglobal.net...
>> Hello people,
>>
>> I was reading some messages a while ago, re: N0ZO no longer on
>> winlink. I have downloaded the airmail200 program (I think!), a file
>> called 'am211.exe'. I have not tried to install it - my current win98
>> machine isn't hooked up to the ham radio. But the documentation on the
>> web page describing am211.exe was vague. Can it be used with a KAM?
>> Which version of KAM? Can it be used with a PK-232MBX? (not the DSP
>> version). Is it only for the Pactor-2 modem, SCS (I think)?
>> Does anyone have any information about this am211.exe airmail2000
>> program?
>> Thanks!
>>
>>
>
>
------------------------------
Date: Fri, 16 Jun 2000 13:15:51 -0500
From: CAM <W6RCA@mindspring.com>
Subject: Hottest and fastest HF mode
Hamish Moffatt VK3SB wrote:
>
> W6RCecilA <Cecil.A.Moore@ieee.org> wrote:
> > Of course, all the FCC has to do to monitor it is acquire an
> > SCS modem. And there's enough published material that dedicated
> > DSP engineers could duplicate the functions of the SCS modem on
> > a DSP eval board. There is no built-in encryption and all the
> > techniques are old hat to DSP modem designers.
>
> Can you tell us where to find published information on
> the protocol with enough detail to build a decoder?
I believe I could take what is available on the net, in manuals,
and from the ARRL, a good signal analyzer, and a closed loop
test system and build a decoder. There can hardly be any secrets
in a system where the input and output are known and one has
the modulating audio available for analysis.
--
73, de W6RCA
------------------------------
Date: 16 Jun 2000 19:31:32 GMT
From: n8blk@aol.com (Art Clemons)
Subject: Hottest and fastest HF mode
In article <TTl25.8602$DH3.24541@news1.eburwd1.vic.optushome.com.au>,
hamish@cloud.net.au (Hamish Moffatt VK3SB) writes:
>Can you tell us where to find published information on
>the protocol with enough detail to build a decoder?
>
Not to be a smartass, but since the silly thing is patented in several
different countries, including I believe Australia, you could try whichever
Australian government agency handles patents.
-art clemons-
------------------------------
Date: Sat, 17 Jun 2000 08:18:28 GMT
From: hamish@cloud.net.au (Hamish Moffatt VK3SB)
Subject: Hottest and fastest HF mode
CAM <W6RCA@mindspring.com> wrote:
> I believe I could take what is available on the net, in manuals,
> and from the ARRL, a good signal analyzer, and a closed loop
> test system and build a decoder. There can hardly be any secrets
> in a system where the input and output are known and one has
> the modulating audio available for analysis.
You should not need to reverse engineer the protocol (using
the signal analyzer and the closed loop test system)
to get enough details to build a decoder.
Should I assume from your reply then that there is NOT enough
freely available public information on Pactor II to build
a decoder, and therefore the protocol is proprietary?
And therefore illegal on any amateur band?
Hamish
--
Hamish Moffatt VK3SB <hamish@debian.org> <hamish@cloud.net.au>
------------------------------
Date: Fri, 16 Jun 2000 19:24:14 GMT
From: "Hank Oredson" <horedson@att.net>
Subject: More on WinLink.
Got this from Hans ... guess he doesn't have internet access.
I'm not certain what message I was asked to post ... but here are a couple.
Seems that Hans confused what someone else posted with my responses
to that post. So i get a bunch of emails from him ... eh?
> Hank,
> I understand you have been stirring up all kind of shit again lately.
You understand incorectly. Read the newsgroups, respond there.
> You know, Hank, I do not mind being critiqued nor do I
> hide behind a brick wall.
You have just done so by not posting this to the appropriate newsgroup.
> But I do have a serious problem with folks like yourself when you take
liberty to
> criticize others on nets and similar broadcast media and at the same time
To be continued in digest: hd_2000_168B
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