ST. VINCENT, J8. Dave, G3TBK will be QRV as J88DR for one week.
This includes an entry in the ARRL SSB DX contest. Afterwards, he
will be active on all bands using CW, SSB, RTTY and possibly SSTV.
QSL to home call.
ARRL-
--
Andy K3UK
www.obriensweb.com
(QSL via N2RJ)
--- In digitalradio@yahoogroups.com, n0sya [EMAIL PROTECTED] wrote:
How does nbems fare in weak signal conditions compared to other modes
such as olivia and mt63?
NBEMS is the software package, not an actual mode. It includes PSK31,
PSK63, PSK 125, PSK250, MFSK16 and RTTY. MT63 and Olivia
How does nbems fare in weak signal conditions compared to other modes
such as olivia and mt63?
NBEMS uses the PSK modes for simplicity of tuning, narrowness, and speed.
Other, wider modes, like Olivia and MT63, work further down under the noise
threshold than the PSKmodes. This makes them
I guess that Skip and I were typing at the same time!
Andy
--- In digitalradio@yahoogroups.com, Andrew O'Brien [EMAIL PROTECTED]
wrote:
I guess that Skip and I were typing at the same time!
Andy
Thanks for all the input, guys!
Chris/n0syq
I recall reading years ago horz TV may have been picked over vert because
some test showed there to be less multipath and therefore less reflections
and ghosts on the picture.
I have no idea whether that is true. I remember seeing vert TV antennas in
some other countries.
AL7BX/ George
I can see that some digital modes would not work very well for ARQ that
is decoded in real time. MT-63 and MFSK16 both have latency due to their
design. I am surprised that MFSK16 was considered, but perhaps this was
due to being the most narrow mode that also can work very deep into the
I recently revisited PSKmail as I had previously downloaded fldigi and
was thinking that I had that program working. I did the necessary unzip
and untar, although I could not get the regular GUI program to do it. It
indicated no directory to put it in and so I just used the terminal
program. I
true John, but function beats pretty most of the time..
As far as FAE400 goes, I would like to try it. Too bad one
can only get it from one source. (gee that kind of makes it
just like pactor 3. I don't hear any anyone screaming bloody
murder about that.) Multipsk may be a very fine
For people who don't want the 'hassle' of installing some perl modules
via CPAN there are 2 possibilities:
* Run pskmail and fldigi from the pskmail_puppy live CD. It boots in 45
seconds
the second time if you save some files on your C drive after first use.
This will give you fldigi 2.09 and
John,
One major advantage of Multipsk is that it works on next-to-nothing
for a PC, you can use it on old 486 machines! Every drop-down box and
fancy bell and whistle usually adds CPU and RAM demand.
To compare ALE400 in Multipsk with Pactor's copyright is absurd . ALE
400 is FREE whereas PIII
After reading this thread with great intrust I still fail to see
the difference between it and what has been done with
the Pactor modes. That is other than being narrow.
I have copies Pactor that has to say the least been about
2 DB under ESP.
As far as FAE400 goes, I would like to try it. Too
All high-latency modes are unsuitable for ARQ.
A persistent misconception is that you would be using signals near the noise
level.
As I have stated many times, noise is hardly ever the problem unless it is S8.
The problem is multi-path causing QSB (up to 80 dB on path we are using) and
QRM from
John,
The difference is HUGE!
Pactor is a proprietary mode and the primary use is for radio e-mail.
The cost is quite high for just that one function and very few of us
digital operators will buy a single sourced foreign product for that
purpose unless we are boaters or RV'ers and want the
Hello John,
As far as FAE400 goes, I would like to try it. Too bad one
can only get it from one source. (gee that kind of makes it
just like pactor 3.
Pactor 2 and 3 have private detailed specifications which forbid to even decode
them (however it would be impossible to work them in ARQ with a
you know what Patrick? it works really, really well and can live with the
GUI however you want it.
John
VE5MU
From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED] On
Behalf Of Patrick Lindecker
Sent: Sunday, March 02, 2008 1:59 PM
To: digitalradio@yahoogroups.com
Subject: Re:
- Original Message -
From: Rick [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Sunday, March 02, 2008 12:52 PM
Subject: Re: [digitalradio] Re: Keeping NBEMS in mind
I can see that some digital modes would not work very well for ARQ that
is decoded in real time. MT-63 and
For important information about JT65 on Multipsk.
73
Patrick
you know what Patrick? it works really, really well and can live with the GUI
however you want it.
TKS John!
- Original Message -
From: Patrick Lindecker
To: [EMAIL PROTECTED] ; [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
and the LATEST beta to the test team has a major surprise !
tease...
On Sun, Mar 2, 2008 at 3:21 PM, John Bradley [EMAIL PROTECTED] wrote:
you know what Patrick? it works really, really well and can live with the
GUI however you want it.
John
VE5MU
From:
Hi Patrick!
This was great news! I am ready for testing form 160m to 10m . Calling
on 14074 right now .
73 de LA5VNA Steinar
Patrick Lindecker skrev:
Hello all,
I have issued a new test version of Multipsk which adds the JT65 mode
(RX/TX), for the ones interested by tests.
This
I earlier mentioned ARQ in real time, but if you use the programming
technique that KN6KB used when he developed SCAMP, (Sound Card Amateur
Messaging Protocol), he used RDFT. While this was not practical to
decode during each cycle, he was able to work in the background with the
past packet
I have seen some multiipath, especially when I have tested PSK31 on VHF,
but much of that was from aircraft. I am not sure how I can discern
multipath when on HF. Is there any clue in the waterfall or do you go by
the sound?
73,
Rick, KV9U
You will see three kinds of multipath on VHF,
I earlier mentioned ARQ in real time, but if you use the programming
technique that KN6KB used when he developed SCAMP, (Sound Card Amateur
Messaging Protocol), he used RDFT. While this was not practical to
decode during each cycle, he was able to work in the background with the
past
This may be true at lower latitudes, but up here at 50 degrees north, we get
sustained aurora flutter or Doppler on HF and VHF. Sometimes the audio has a
distinct echo. PSK125 and 250 are worse.
we do have days where we have strong signals but cannot decode anything.
it would be nice to have
John,
Over what distance are you getting flutter or Doppler on VHF? I only get the
flutter (usually all the time!) when I try to work Charlotte, NC from
Charleston, SC on 70 cm, which is 173 miles away, but I am not far enough
north for Aurora. For emcomm, we only need to span up to 100 miles.
Yes you must buy a box to play the mode.
What did you do before the sound card?
Maybe watch your corn grow.
As far as the email comment, I can tell you have
not seen to much if any of the pactor or packet
traffic of late. Just going on what other have said.
John
At 01:30 PM 3/2/2008, you
on occasion less than 100 miles on VHF and sometimes as little as 30 miles
on 80M HF
I disagree with the assumption that for Emcomms we only need span 100 miles.
That may be true in higher population areas, and where the state is broken
down into counties. Up here we will be working into
It is precisely because of the sound card that we no longer buy
expensive boxes, cards, etc.
When I got back into ham radio in 1980, it was not long before I found
that I enjoyed the digital modes. When I moved from our first farm back
to the city, I was very surprised to see one local ham who
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