The reading I have done indicates there are three main natural issues in
dealing with HF propagation: noise, fading, and multipath. There are other
factors like impulse from either man-made or natural causes but the one I
mentioned are clearly critical.
It may even be that noise is less of an iss
Hi Rick,
The other night I went through that PhD thesis you have posted on HfDec.
The main problems on HF, according to that author, are not AWGN but fading
and multipath. He even indicated that the AWGN model is inaccurate that
empirical measurements indicate the noise is Laplacian, which has a
Quite all right being blunt with me Bonny. I am learning about HF protocols
and part of them will be mean getting slapped down about misinformation. I
am deed-restricted so have some problems getting HF. But I am addressing
them so I may get onto the HF waves with at least an NVIS setup in the near
Like so many things in life, there are tradeoffs and ALE is not all that
bad, but it is also not all that good either. Rud's comments are
accurate, unless you ignore what the military/commercial/government
actually writes about ALE.
When I first read about ALE in QST many years ago, beginning i
>>>AA6YQ comments below
--- In digitalradio@yahoogroups.com, "expeditionradio"
<[EMAIL PROTECTED]> wrote:
Most of the "automatic" or "unattended" sub-bands or band segments on
HF were formed many years ago before such operations become so widely
popular as they are now. Presently there are many
Most of the "automatic" or "unattended" sub-bands or band segments on
HF were formed many years ago before such operations become so widely
popular as they are now. Presently there are many thousands of hams
actively using these methods, and it is increasing daily.
Thus, the segments devoted to i
Were the strident advocates of unattended operation to focus their
energy on adding effective busy detectors and some form of universal
QRL protocol to their unattended stations, they could rightfully
claim that unattended stations were no less polite than any human
operated station, and ought
I am sure, you have heard of the expression... 'give an inch take a
mile'
Larry ve3fxq
- Original Message -
From: "Andrew O'Brien" <[EMAIL PROTECTED]>
To: "DIGITALRADIO"
Sent: Saturday, September 22, 2007 1:49 PM
Subject: [digitalradio] Here's some frequencies for unattended HF
ope
Andrew O'Brien wrote:
> I'm an odd ham in that I smile with amusement when amateur radio
> groups rush to "defend" frequencies and worry about some non-hams
> getting "our" frequencies. I happen to think we have more than we
> need and can easily give some away.
>
I read the rest of the messag
> Rud k5rud wrote:
> My recent readings indicate that the ALE standards
> are _NOT_ good for ham use because the military is not power
> limited. They can attain good SNRs because of this.
> Hams are not able to do this.
Hi Rud,
Sorry to be blunt, but your opinion about ALE standards is sim
This is a repeat post Mark.
Andy K3UK
Owner.
On 9/22/07, Mark Thompson <[EMAIL PROTECTED]> wrote:
>
>
>
>
>
>
>
>
>
>
> ALE On The Air Week
>
> Posted by: "expeditionradio" [EMAIL PROTECTED] expeditionradio
> Date: Fri Sep 21, 2007 11:50 am ((PDT))
>
> ALE On The Air Week is 5-15 October
Hi Rud,
Yes, the Military and Government HF users can and do at times operate
with more RF EIRP that we Radio Amateurs have licensed limits for operating.
However, WRT ALE at least, its not needed and the bulk of HF Military
activity is usually within NVIS ranges as its tactical, and with NVIX
Peter G3PLX publicly released PSK31sbw, the first soundcard-based
implementation of PSK31, in late 1998. Previous implementations of
PSK31 required special purpose hardware.
Skip KH6TY and Nick UT2UZ released the first panoramic soundcard
PSK31 application (Digipan) in early 2000.
In June 200
Hi Andy,
Frequencies are are required on all the Amateur Radio band assets to
deal with the changes in propagation 24/7. As a matter of fact, the
Amateur Radio Service does not have enough allocations to actually
deal with 24/7 propagation changes, a key reason for the WARC bands
in '79 and t
I'm an odd ham in that I smile with amusement when amateur radio
groups rush to "defend" frequencies and worry about some non-hams
getting "our" frequencies. I happen to think we have more than we
need and can easily give some away. With that in mind , here are some
freqs for PACTOR and ALE stati
~540 enhancements later...
http://www.dxlabsuite.com/winwarbler/Heard.jpg
73,
Dave, AA6YQ
--- In digitalradio@yahoogroups.com, "Andrew O'Brien"
<[EMAIL PROTECTED]> wrote:
>
> From the digital radio reflector 7 years ago this month
>
>
> WinWarbler 1.7.0 is available
>
> WinWarbler
ALE On The Air Week
Posted by: "expeditionradio" [EMAIL PROTECTED] expeditionradio
Date: Fri Sep 21, 2007 11:50 am ((PDT))
ALE On The Air Week is 5-15 October.
http://hflink.com/aotaw
It is an international readiness event, with direct HF messaging, HF SMS (phone
texting), or short tex
I would just point out that this is a beta - I am hoping to release 1.2 by
the end of October.
Simon Brown, HB9DRV
- Original Message -
From: "grant390" <[EMAIL PROTECTED]>
>
> If you are looking for Ham Radio Deluxe (and DM780):
>
> http://hrd.ham-radio.ch/
>
--- In digitalradio@yahoogroups.com, "jhaynesatalumni" <[EMAIL PROTECTED]>
wrote:
>
> Why do you tell us where to get it?
>
If you are looking for Ham Radio Deluxe (and DM780):
http://hrd.ham-radio.ch/
kd7ofv
Why do you tell us where to get it?
Hello to all,
I found two bugs on the ARQ FAE during my tests with Steinar. They are fixed.
A 4.4.2 Multipsk test version in a ZIP test package is available in my site. It
contains the Multipsk test version (with ARQ FAE bugs fixed).
http://f6cte.free.fr/MULTIPSK_TEST_22_09_2007.ZIP
Paste this
Using Winlink to Deliver Email - W3QA Dayton Presentation
http://www.therainreport.com/rainreport_archive/rainreport-9-21-2007.mp3
Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mai
Here is a table I generated in Excel. I will get something up on The Ham
Network to do calculations, or put up the spreadsheet.
SNR C/BWBW/CBW for
(db)(bits/s/Hz)(Hz/bits/s) 1200 bps
---
--- In digitalradio@yahoogroups.com, "Andrew O'Brien"
<[EMAIL PROTECTED]> wrote:
>
Andy,
Wow that long ago! Started to get back on HF after an absence of ten
years in 2000. Did not know about PSK31 then. Downloaded HamComm and
built the interface to connect to the serial port of the computer. Got
by AA6A Sep 19, 2007 18:10 from http://www.eham.net/reviews/review/62637
This Program Rocks!!! It's been in development for over a year and the
effort shines through with a harvest of bountiful features.
If you've ever used PSK31 Deluxe, DM780 replaces it. It will seem
familiar, but don't worr
>From the digital radio reflector 7 years ago this month
WinWarbler 1.7.0 is available
WinWarbler allows you to conduct QSOs using the PSK31 mode developed by
Peter Martinez, G3PLX. To aid PSK31 DXers and contesters, WinWarbler can
simultaneously decode and display PSK transmissions on three sep
Hello to all,
I have issued the version 2.0 of Multidem which permits to demodulate I/Q
signals from a SdR receiver (and, of course, I signals from a DSB receiver) and
to manage them by Multipsk through a TCP/IP link.
Multipsk 4.4.1 and Clock 1.7.4 only fix some bugs, mainly relatively to GPS
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