Having learned CW in 1959 and computer programming in 1968, I take your point.
In the broadest sense, CW is binary. It is true most digital modes have
fairly precise timing, whereas CW, especially sent with a straight key, can be
quite the opposite.
I have been doing my best to stay away
This note is for users of the TS-2000 who could use the ability to reduce Rx
bandwidth to as narrow as 50 hz.
Andy K3UK asks about mitigating the problem of a strong signal near your weaker
target signal. Phil points out IF DSP is better than AF DSP, but a technique
described by Hans N0AN
This is a terrific review. You identify what's important to you so we can
understand your thinking, and you give your reasons for preferring one program
over another. Very useful for all of us.
Jim - K6XZ
- Original Message -
From: Ed Hekman
To:
That is a good price. I wonder if it has enough computer power for some of the
powerful digital mode programs.
That approach gives you the most versatility, but I'm going a different way for
PSK field work -- the NUE-PSK digital modem. It has it's own LCD screen and
processor with software
Is DRM that wide?
- Original Message -
From: Cortland Richmond
To: digitalradio@yahoogroups.com
Sent: Monday, January 11, 2010 5:48 PM
Subject: RE: [digitalradio] Mystery signal on 75M
There's some European DRM broadcasting in that range.
Cortland
[Original
-dx.com/msg06085.html
FWIW, we in the US still have some AM HD Radio stations on IBOC wiping out
reception of adjacent frequencies.
http://www.radioworld.com/article/8714
Cortland
KA5S
- Original Message -
From: J. Moen
To: digitalradio@yahoogroups.com
Sent: 1
From Kenwood's booth at the 2009 Tokyo Ham Fair, posted on YouTube in August,
2009. It shows a mock-up of Kenwood's next mid-range (US $2,000) 160-6 meter
HF radio that targets most of the Elecraft K3's specs. A real one should be
at Dayton 2010. One assumes it will be as easy at digital
While frequency-hopping was first introduced in a patent filed by Nikola Tesla
in 19000, I've always been fascinated by the role of Austrian actress Hedy
Lamarr in the development of spread-spectrum.
According to Wikipedia, Lamarr had learned about the problem at defense
meetings she had
Sticking with the USA/FCC-centric discussion, I agree with Alan KM4BA, when he
wrote:
If the radio stays on a single frequency in SSB mode the new mode does not
meet the definition of spread spectrum that is restricted in HF. Many advanced
digital protocols manage the spectrum in the SSB
What is the FCC definition of spread spectrum, and where can it be located on
the internet?
Jim - K6JM
- Original Message -
From: John B. Stephensen
To: digitalradio@yahoogroups.com
Sent: Saturday, February 20, 2010 7:58 PM
Subject: [digitalradio] ROS - make it legal in
Excellent idea to ask FCC for an opinion.
Dave K3DCW referred to Part 97, but the section he quoted really only describes
emission mode designation codes for SS, and does not technically describe how
FCC defines SS. It's almost as if Part 97 assumes the definition is so well
known that it's
Bonnie's note describes the US/FCC regulations issues regarding ROS and SS
really well. It's the best description of the US problem I've seen on this
reflector.
After reading what seems like hundreds of notes, I now agree that if ROS uses
FHSS techniques, as its author says it does (and none
And think real hard next time before calling the FCC. Ham radio was the
net loser in this episode. We are already viewed as squabbling children
at the FCC, and this type of episode just reinforces that view of
amateur radio.
AMEN.
Jim - K6JM
- Original Message -
From: Alan
@yahoogroups.com [mailto:digitalra...@yahoogroups.com]on
Behalf Of J. Moen
Sent: Wednesday, March 03, 2010 1:04 PM
To: digitalradio@yahoogroups.com
Subject: Re: [digitalradio] Re: Statement on Withdrawal of Support for ROS
(K3UK Sked Pages)
And think real hard next time before calling the FCC
LA5VNA Steinar wrote: This has taken a whole new turn for me. I don't
like this at all.
I don't like it either, including the threats of legal action and the
call for an ARRL official to resign (not that there isn't a good
argument about a double standard here in the US, but this is not the
time
I've had nothing but good luck with the Rascal. Used it for about 7 years.
The newer ones now support PTT over a USB cable.
Some of the connectors, particularly radio connectors, can be difficult to
solder up, so the radio cable for your radio included with the Rascal is very
nice.
Support
Simon, Interesting comment about EmComm in the UK.
I live in an eathquake-prone area. We assume the telecoms infrastructure will
be down for days or weeks, depending on severity. Hurricane Katrina showed
other weather problems can take out the telecoms and power infrastructure for a
long
Mel,
You make a good point about our differences. In the US, EmComm is a niche
that some hams fill enthusiastically, while others don't get involved but are
grateful for those who do. It's always there to learn about in the future,
like digital modes, QRP, EME, UHF DX, low bands, etc. So
John W0JAB wrote: I like it (Pactor) and will operate it.
You have every right to, assuming you don't interfere with an ongoing QSO etc.
And someone calling your home and swearing at you was uncalled for, so to
speak, and not in the spirit of ham radio.
But several people have brought up
Some USB/serial converters don't work with all programs. Probably something to
do with the USB drivers. The best one I have was purchased from
www.buxcomm.com -- it works with all the various digital mode programs I use,
plus programmers for my HTs etc. It is US $15.
John W0JAB wrote: I Have only been a (ham) since 1968 and still learning. But
I don't recall all of this happening 10 or more years ago.
I got into amateur radio in 1959, and there were fairly strong disagreements
between AMers and SSBers.
In recent years, there have been disagreements
I typically don't load up Ham Radio Deluxe, I go directly to DM780, so while
there is a lot of extra functionality there if you need it, you certainly don't
have to ever see that. I really, really like DM780's superbrowser mode that
displays and decodes all accessible PSK signals in the
instead of standardizing on one
is that you lose the benefits of computer logging. I guess the OP maintains a
paper log so he isn't concerned with that aspect.
Does DM780 have a log, or do you need HRD for that?
Julian, G4ILO
--- In digitalradio@yahoogroups.com, J. Moen j...@... wrote
I'm can understand how Garrett feels -- I felt something similar when we were
all using the Melp codec for FDMDV on HF, and the owners of Melp kind of knew
about it but since no one was trying to make money from it (we are amateurs and
not in it for the money), they turned a blind eye to what
That, and the fact that if you believe the author's original description of ROS
that it uses spread spectrum, then it's not legal in the US on bands lower than
220. What's frustrating about the FCC rule is that ROS appears to use a
relatively narrow band form of frequency hopping spread
There's the generally accepted definition of SS, quoted below and referring to
bandwidths greatly exceeding what's necessary, and then there's the way the FCC
regs are written, which do not refer to that definition.
I think just about everyone, or maybe absolutely everyone who cares about the
This question of bandwidth for various modes and where to squeeze in the wider
modes is a good topic. Reminds me of the folks who really like enhanced
fidelity SSB (3.5 out to nearly 5 kHz), or AM. There are many bands at certain
times of day that have lots of space for those modes, but I'd
Your Subject says ROS is better. Where can I read about the changes and
improvements? Can users control whether ROS should generate the artificial
spots?
Jim - K6JM
- Original Message -
From: Peter L. Jackson
To: * Digitalradio
Sent: Wednesday, July 14, 2010 6:37 PM
Check out ARRL's web site at http://www.arrl.org/renewals which says:
As one of the many benefits we offer ARRL members, ARRL members will
automatically receive a form from ARRL with instructions on license renewal
once they are just outside the 90 day window for renewal of their amateur
I know this is out of fashion, but I really like PSK31, for its narrow
bandwidth and effectiveness with low power. It was the first mode I ever did
where I could have a QSO with a signal burried by the noise. I like some of
the newer modes, and am happy to see the popularity of Olivia and
Your definition might be called what good SS is and the way ROS does SS might
be called what bad SS is. But how wide is PSK31? Is ROS wider? So ROS is
wider than needed to convey intelligence.
What's sad is that one country's regulations (and they affect me since I live
there) focus on the
I agree that traditional SS spread across a very large portion of the band
would be bad here in the US if a lot of stations were using it at once. ROS,
though we know it's not as good as several other modes, is not that kind of SS.
It has limited bandwidth, not much different from a number of
I completely understand the lure of the old mechanical teleprinters. But I
have to say I was surprised at my reaction to the addition of RTTY to the
firmware in my NUE-PSK modem.
I typically use the NUE-PSK battery powered plugged into my 817 while doing QRP
in the field. I don't need to
Will be interesting to compare this effort to the NUE-PSK, which takes a
different appoach. They have a modem that plugs directly into a transceiver's
Data port eliminating the need for PCs and soundcards, but they are now working
on a NUE-SDR transceiver that either will fit as a card inside
be remotely
located and is mode agnostic. Both approaches have their own advantages.
--
From: J. Moen j...@jwmoen.com
To: digitalradio@yahoogroups.com
Sent: Tue, July 20, 2010 8:50:07 PM
Subject: Re
that, a keyboard and your radio going all at once?
On Tue, Jul 20, 2010 at 10:20 PM, J. Moen j...@jwmoen.com wrote:
Remote control. Very useful in some situations. Especially if you aren't
allowed to have decent antennas where you live.
The kick I get from battery-operated QRP
I think you got some great answers, with the general theme that Linux is an
excellent operating system AND people have written native Linux ham programs
that also are excellent. Bottom line -- hams will be more than happy running
Linux as their prime operating system.
There was one replier
Maybe, but I had a nice PSK31 QSO with a CO last week. He had a very clean
signal.
Jim - K6JM
- Original Message -
From: KB3FXI
To: digitalradio@yahoogroups.com
Sent: Wednesday, August 04, 2010 3:21 PM
Subject: [digitalradio] Re: World's nastiest PSK31 signal
Andy,
You are not too fussy. We should all try to have clean signals. Imagine if
everyone were that wide during a contest. If enough people give the bad signal
operators accurate feedback, perhaps many of those operators will try to fix
the problem.
Jim - K6JM
- Original Message -
The Signalink doesn't require a separate line from the PC to the interface for
PTT. Instead, it has its own VOX circuitry to key the transmitter when it
hears data from the PC.
Some people really prefer this. I happen to prefer having the PC program
(HRD's DM780 in my case) directly
Jon KB1QBZ wrote: the need to run HRD AND the logbook AND the IP server in
v5.x in order to get a logbook and the real-time identification...
I run a Beta version 5 of DM780 and often start it directly by itself, just to
check the bands. If I need the logbook, I can load it separately.
Steve,
There have been some terrific responses with some great advice.
I'll focus only on the interface between the radio and the PC's soundcard.
Even for casual usage, I'd recommend that you not use the built-in soundcard
that came with your computer, and that you probably use for PC things
This is very, very good news, and it may turn out to be a very big deal. It
will be fun to hear reports from the early adopters. There aren't many people
who can write this kind of code -- if you like where Dave is headed, you may
want to donate to his CODEC2 effort that's referred to in the
There's a good introduction to APRS at http://www.wa8lmf.net/bruninga/aprs.html
At the bottom of that page is a link to join the TAPR APRSSIG email list. It
is very active and I'd recommend you join.
My other suggestion applies if you would like to have some fun at home right
off the bat.
There are people who probably have the answers to the points you make since
some have already had DX QSOs using D-Star -- I haven't, so I'm looking to try
this out on 10 meters. Mostly I think your prediction will turn out to be
correct. I am expecting that only under near-perfect conditions
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