Hi Rick,
FYI, our tests last night indicate that MFSK16 still copies the best at low
S/N, but only when there are no static crashes, but DEX16 or DEX11 have much
fewer errors when there are static crashes. The problem with MFSK16, as you
found, is the mistuning tolerance. For messaging, when
PSK63 with DominoEX16 for our 2 meter net, after two more
weeks of tests to see how it performs with multipath reflections.
I'll include mention of the sample rate to use in the Help file.
Thanks for the tip!
73, Skip KH6TY
- Original Message -
From: Mark Miller
To: digitalradio
/usbfob.pdf)
73, Skip KH6TY
fast.
Anyway, it is probably better to use something other than the FT-857 for
digital modes as finding the ALC threshold is very critical for getting low
IMD, even on PSK31, and drift is a problem on 2 meters unless you have the TCXO
option, which my FT-857 does not.
73, Skip KH6TY
. The best around here seem to be the little green
ones from Radio Shack.
73, Skip KH6TY
- Original Message -
From: Leskep
To: Digitalradio
Sent: Friday, April 18, 2008 9:08 PM
Subject: [digitalradio] RFSM8000 and Yaesu FT857
Greetings to all
Is anyone using the FT857
Started listening to 30m at 8 AM. Only heard a propnet station coming on
periodically. For one hour, no other activity - took a *big* risk - called CQ!
;-)
Worked Columbia and California.
When in doubt - just try calling CQ! Maybe the band is not dead after all.
73, Skip KH6TY
computer soundcard for use by
Windows. Just use VOX for PTT.
73, Skip KH6TY
- Original Message -
From: Andrew O'Brien
To: digitalradio@yahoogroups.com
Sent: Sunday, April 13, 2008 8:41 AM
Subject: [digitalradio] Re: Anyone need a $6.50 soundcard ?
--- In digitalradio
This makes about as inexpensive a complete PSK31 interface as you can get!
If you have any feedback problems, just add a Radio Shack isolation transformer
in the transmit audio line.
73, Skip KH6TY
Hello Andy,
I have used almost the similar USB sound adapter and made a
modification to get a very high
Andy,
There may be some misunderstanding. I already have four of the USB Sound
Adapters, which I will use to help local hams get on NBEMS. Please take me off
your list, as I don't need any more.
Thanks,
Skip KH6TY
times of
many static crashes and let us know the result, I would greatly appreciate it.
Multipsk supports both DominoEx, and MFSK16 under Windows, as does fldigi,
under Linux.
73, Skip KH6TY
NBEMS Development Team
If everyone who thought 30m was dead just called CQ, that opinion might
change very quickly!
Try it! It is a time-honored technique! ;-)
73, Skip KH6TY
take care of any errors.
73, Skip KH6TY
- Original Message -
From: Andrew O'Brien [EMAIL PROTECTED]
To: DIGITALRADIO digitalradio@yahoogroups.com
Sent: Saturday, March 29, 2008 10:10 PM
Subject: [digitalradio] 80M warbler rig / Other modes ?
Before I go looking through my junk boxes
chose either to use the Internet to forward the message or deliver it by
any other means.
73, Skip KH6TY
NBEMS Development Team
- Original Message -
From: John Becker, WØJAB [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Monday, March 24, 2008 9:26 PM
Subject: [digitalradio
the bands also.
73, Skip KH6TY
- Original Message -
From: John Becker, WØJAB [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Tuesday, March 25, 2008 11:17 AM
Subject: Re: [digitalradio] April QST page 35
Sorry Skip I have not gotten to page 80 yet
and VBdigi,
so you can easily confirm with whomever you are testing that you both have
the same version.
The April issue of QST headlines NBEMS on page 80 and does a good job of
putting NBEMS in the proper perspective.
73, Skip KH6TY
NBEMS Development Team
- Original Message -
From: Rick
not use AGC, but distribute gain in such as
way that it can copy weak signals adjacent to strong ones, without
distorting the last IF stage or detector, but few transceivers can do this.
A dual-loop AGC system may help and some high-end transceivers have this.
73, Skip KH6TY
is to always transmit with a linear, clean, signal so your unwanted
sidebands do not QRM any adjacent station, either near to you or somewhere
else
73, Skip KH6TY
.
it will work under poor HF conditions.
ALE400 works well into the weeds, and it would be great to see you and
Patrick team up to combine NBEMS and Ale400 in one package.
John
VE5MU
From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED]
On
Behalf Of kh6ty
Sent: Sunday, March 02, 2008
In that case, it will be necessary to switch to HF and use NVIS antennas,
which extends the range to 300 miles but with somewhat less throughput using
ARQ due to static crashes. Using ARQ will still get the messages through
without errors - it just takes longer.
73, Skip KH6TY
Not only
can demonstrate the difference here, since I have
both NVIS and regular 80m antennas. I have found around 2 S-units of static
noise reduction using the NVIS antenna.
73, Skip KH6TY
We do plan on using HD, NVIS antennas and data modes as long as they are
faster
than I can receive CW (about
narrowband modes, instead of wider modes, for the most
effective and reliable emergency messaging over distances up to 100 miles.
73, Skip KH6TY
NBEMS Development Team
No virus found in this incoming message
emergency communications when asked to do so. Even going from PSK31
(which tens of thousands now use) to PSK63 is a no-brainer, which is one of
the reasons we chose to use PSK63 as the base mode for NBEMS.
73, Skip KH6TY
NBEMS Development Team
this problem, and there may be a way to improve that cascaded loss of sync
in the faster modes, due to QRN, but we have not yet tackled this problem.
Fortunately, for our 100 mile emcomm uses, QRN and QSB are not problems on
VHF, and ARQ takes care of the multipath reflection problem.
73, Skip KH6TY
. I am
interested to know if you also find flutter on VHF within 100 miles.
Skip KH6TY
- Original Message -
From: John Bradley [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Sunday, March 02, 2008 9:30 PM
Subject: RE: [digitalradio] Re: Keeping NBEMS in mind
This may
on Sunday nights.
73, Skip KH6TY
is an exciting new world on 2m SSB, both phone and digital, for
anyone who has only used 2m to work repeaters, and it is well worth
considering trying. It is not all weak signal work, either!
73, Skip KH6TY
Please correct FT-890 to read FT-897.
Thanks,
Skip KH6TY
-polarized mobiles over distances just exceeding 100 miles, when
the elevations of both myself and the mobile do not exceed 30 feet ASL.
73, Skip KH6TY
- Original Message -
From: Theodore A. Antanaitis
To: digitalradio@yahoogroups.com
Sent: Friday, February 29, 2008 4:16 PM
Subject
to integrate images with QSO's in addition to
SSTV techniques, but none of them may be all what we wish they were!
73, Skip KH6TY
to see that happen. The need never goes away!
Skip KH6TY
- Original Message -
From: Dave Bernstein [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Friday, February 01, 2008 3:39 AM
Subject: [digitalradio] Re: Logging for MultiPSK and DM780
Re UDP servers, we established
and Features under VISTA), find NBEMS, and remove it.
Then run the latest setup.exe installation program.
The NBEMS Development Team
Skip, KH6TY
Dave, W1HKJ
, the very *first* item you come to is the download
link, so that is not too hard to find, is it...
73, Skip KH6TY
From: John Becker, WØJAB [EMAIL PROTECTED]
http://www.your-site.com/nbms/download
Really it's like saying you can see my tax return for 2006 at
http://www.irs.gov
spending
for each picture but probably about the same time for the average
PSK31 exchange of text.
Andy
On Jan 25, 2008 8:02 PM, kh6ty [EMAIL PROTECTED] wrote:
Thanks for the narrowbnad SSTV QSO, Tony. Sorry I was so slow - my first
time and I did not read Andy's bozo guide! ;-(
I can
Skip,
Thanks for the narrowbnad SSTV QSO
My pleasure and thank you. Nice signal from KH6 -- punched through the
QRM.
Tony -K2MO
- Original Message -
From: kh6ty [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Friday, January 25, 2008 8:02 PM
Subject: Re: [digitalradio
swapping pictures, like regular SSTV, but without any way
to communicate during the picture reception, or am I missing something?
73, Skip KH6TY
- Original Message -
From: Tony [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Friday, January 25, 2008 7:26 PM
Subject: [digitalradio
, time and I don't
remember exactly everything it was used for, but the idea is not new.
73, Skip KH6TY
- Original Message -
From: Rud Merriam [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Sunday, January 20, 2008 3:47 PM
Subject: [digitalradio] TV Whitespace Testing
The FCC
to preface an
off-topic post with OT: and those who do not want to be bothered with
off-topic posts can simply filter them out, or use the Delete key. Doesn't
work with digests, but those can be scanned visually and OT: skipped over.
73, Skip KH6TY
, but
not detectable by the remote station, in an email delivery system. It is
this capability that makes it possible for radio amateurs to *share* a
limited amount of spectrum that one-way systems do not possess.
Skip KH6TY
Sadly, my antenna cannot accommodate 30 metres..
73s
Jack VK4JRC
Jack,
I use my 80m base-loaded, tophat, vertical on 30m, and it works great! 80m
and 30m are harmonically related. 3.5 x 3 = 10.150. Similar to using a 40m
antenna on 15m.
73, Skip KH6TY
, to the detriment of all.
73, Skip KH6TY
John
VE5MU
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.516 / Virus Database: 269.19.2/1222 - Release Date: 1/13/2008
12:23 PM
stations do not, and cannot, listen first for any other activity
within range of the unattended station).
It does not matter how short a time the unattended interference signal is on
either. If it disrupts a QSO, it is *too long*.
Skip KH6TY
Announce your digital presence via our Interactive
All the ALE data activity is in the automatic subbands unless the
stations manually QSY off frequency under operator control.
So what's the concern?
As long as it always stays in the automatic subbands, there should be no
concern. In fact, ALE is a valuable resource, IMHO.
Skip KH6TY
they!
73, Skip KH6TY
representative to the
IARU. Under FCC rules, automatic operations with less than 500 Hz bandwidth
may be conducted anywhere the mode is authorized.
http://www.iaru-r2.org/wp-content/uploads/region-2-mf-hf-bandplan-e.pdf
73, Skip KH6TY
- Original Message -
From: expeditionradio [EMAIL PROTECTED
Copying you FB in South Carolina, Howard, using DigiPan 2.0.
Sorry - No Pactor 1 transmit capability - my PK-232 is in mothballs!
Skip
- Original Message -
From: w6ids [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com; [EMAIL PROTECTED]
Sent: Friday, January 11, 2008 2:10 PM
Subject:
VBdigi is looking for the following files in D:\Program Files\NBEMS
directory:
emailsetup.rtf
flarq.rtf
logbook.rtf
messaging.rtf
vbdigi.rtf
vbdigisetup.rtf
Do a search for flarq.rtf and tell me where it is located on your system.
Thanks.
Skip
- Original Message -
From:
files in vbdigi
--- In digitalradio@yahoogroups.com, kh6ty [EMAIL PROTECTED] wrote:
VBdigi is looking for the following files in D:\Program Files\NBEMS
directory:
emailsetup.rtf
flarq.rtf
logbook.rtf
messaging.rtf
vbdigi.rtf
vbdigisetup.rtf
Do a search for flarq.rtf and tell me where
to D: drive? Maybe
that is a clue.
73, Skip KH6TY
- Original Message -
From: jhaynesatalumni [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Thursday, January 10, 2008 5:35 PM
Subject: [digitalradio] Re: Help files in vbdigi
--- In digitalradio@yahoogroups.com, kh6ty [EMAIL
Von: kh6ty [EMAIL PROTECTED]
An: Jim Gorman [EMAIL PROTECTED], Mark Miller
[EMAIL PROTECTED]
CC: Greg Thompson [EMAIL PROTECTED], Albert Schramm
[EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED]
Betreff: [digitalradio] Re: Pactor on 30 M
Sent this email this morning:
Good morning
Should be http://www.w1hkj.com/NBEMS. The k and h were transposed.
Skip KH6TY
- Original Message -
From: Chuck Mayfield [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Sunday, January 06, 2008 6:38 PM
Subject: Re: [digitalradio] Re: Pactor on 30 M
Try: http://www.w1khj.com
, but it can
only work if a narrowband mode is used, so that there are many stations in
the passband (in the same area of the band).
73, Skip KH6TY
and will posting an update soon, which will
also fix a few isolated bugs that have been reported.
73, Skip KH6TY
Kevin,
Do you realize that 3 x 3.5 = 10.5, which is close to 10.137. An 80m antenna
will operate on the third harmonic for 30m operation! I have never seen this
published as far as I can remember. Lots of references to using a 40m
antenna on 15 m, but not to using an 80m antenna on 30m. This
be watching 30m now and will be available for some NBEMS ARQ file
transfers.
73, Skip KH6TY
- Original Message -
From: Andrew O'Brien [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Friday, January 04, 2008 6:12 PM
Subject: Re: [digitalradio] NBEMS/Flarq Frequencies
I think
on that frequency if they can hear either of
the stations.
Today I was able to correctly configure my emachines computer to run the
vbdigi software using the suggested frequency of 10137 +1000 Hz. I
happened to be on the same time as Skip, KH6TY, and so we were able to
work each other although
We did this between Illinois and Texas, and between North Carolina and
Texas
so we did not have the benefit of NVIS. This probably increased our
retries.
Can we control the size of transmitted units? Or does the program reduce
unit
size in difficult conditions?
Thanks for a great
the progress bar on Flarq has progressed from white to green to full
green and then white again.
73, Skip
KH6TY
Oh dear, fist trial with NBEMS was not a happy one, for me, I'm afraid...
Appart from not knowing my way round the program, which is not the fault
of the program of course, I also had
always use VOX for PTT if you use the mic input of the
transceiver.
Skip KH6TY
- Original Message -
From: Rick [EMAIL PROTECTED]
To: [EMAIL PROTECTED]; digitalradio@yahoogroups.com
Sent: Thursday, January 03, 2008 4:45 PM
Subject: [digitalradio] NBEMS problem
I went ahead today
, I am using VOX to key the Kenwood TS-440 via the AFSK
RCA jacks after I re-discovered (have not used this for digital for
many, many years) that it can not be driven adequately via the Line out
from the sound card when using the 13 pin DIN plug.
73,
Rick, KV9U
kh6ty wrote:
Rick, do you
Thanks, Andy. Will check this right away.
Skip
- Original Message -
From: Andrew O'Brien [EMAIL PROTECTED]
To: DIGITALRADIO digitalradio@yahoogroups.com
Sent: Tuesday, January 01, 2008 10:08 PM
Subject: [digitalradio] Help file error in VBdigi
Dave/Skip
When I attempt to minimize
Kevin,
I think you can trust this setup.exe. It is a Microsoft-generated
installation program that only adds a few Microsoft DLL's to your system and
installs the program files we have created. I'd go ahead and make an
exception for this particular setup.exe.
Skip
KH6TY
ZoneAlarm
. (and all my
open windows get minimized).
Right-click on the Taskbar and see if Quick Launch is checked. If not, check
it. It sound like you are trying to drag it to the Taskbar and not the Quick
Launch toolbar.
73, Skip KH6TY
have been much stronger. I am amazed we
could had a QSO at all, under such poor conditions!
You are my first totally random ARQ QSO using the NBEMS, and I connected
with your beacon signal, so I am very gratified with the result tonight!
73, Skip KH6TY
Mount Pleasant, SC FM02
- Original
comments and bug reports to
[EMAIL PROTECTED]
Happy New Year to you all!
The NBEMS Development Team
Skip, KH6TY
Dave, W1HKJ
will like to serve as beta testers, try the system with
each other, and send feedback to us so that we may improve the system as
much as possible. Please reserve comments until after you have used the
system.
We wish you and everyone else a happy and prosperous New Year!
73,
Skip KH6TY
with attended stations on shared bands, and your explanation would be
very much appreciated!
Thanks in advance,
Skip KH6TY
KH6TY
will transmit
anyway in response to a client station that cannot hear me.
This is the problem with unattended stations. When stations on both ends are
attended, each can hear a station local to itself, so the chances of
inadvertant QRM to a local station are probably cut in half.
73, Skip KH6TY
I filed my comments today on Mark's petition, which is very well written and
logical, and encourage everyone else who values space to work without
interference from email robots also to do so.
Merry Christmas to all!
Skip KH6TY
Announce your digital presence via our Interactive Sked Page
is
too high, add a simple resistive attenuator as outlined in the DigiPan Help.
Some transceivers need a 1:1 audio isolation transformer in that line, and
some do not. This is about as inexpensive as you can get for an interface.
Skip KH6TY
- Original Message -
From: Gmail - Home
.
Skip KH6TY
- Original Message -
From: Rick [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Saturday, December 22, 2007 10:13 AM
Subject: Re: [digitalradio] 30 Meter digital
My use of the band is mostly based upon propagation and, as you pointed
out, minimal competition
experiment some years ago in which scientists set
up two cages of rats, one overcrowded and one just at capacity. The rats in
the overcrowded cage ate each other until they were no longer overcrowded.
Skip KH6TY
It is almost for sure that if the FCC equated DV as being similar to any
other
their
annual 24-hour QSO party on November 18 and the passband was filled with
PSK63 stations for 24 hours. Andy can elaborate. You might give it a try
next time and compare the speed of exchanges to RTTY contests, of which
there are many.
73, Skip KH6TY
(proposed by
Bonnie):
1837.0, 3589.0, 7037.5, 10141.5, 14074.0, 14094.0, 18104.5, 21094.0,
24926.0, 28146.0, 50162.5, 144162.5 (AF at 1625 Hz).
The complete list of frequencies is on http://hflink.com/ale400;.
73, Skip KH6TY
Patrick,
It is my understanding that 7040 in the US and 7035 in Europe are both QRP
watering spots where many are using crystal control, low power, and cannot
relocate. Is ALE400 at 7037.5 going to straddle both of those frequencies?
No, it will not. My mistake! I was thinking about 4000 Hz
have any feedback or ground loop problems, just insert an isolation
transformer in the transmit audio line.
73, Skip KH6TY
contests.
73, Skip
KH6TY
- Original Message -
From: Rud Merriam [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Monday, November 19, 2007 12:42 PM
Subject: RE: [digitalradio] Re: PSK63 activity!
This is also rationalization. The ability to provide disaster communications
entails
is worthwhile and includes preparation for contests
as well as proving out equipment setups during contests.
Operating skills for contests are definitely different from those need for
emergency communications, though.
73, Skip
KH6TY
- Original Message -
From: Rud Merriam [EMAIL PROTECTED
for helping launch PSK63!
73, Skip
KH6TY
- Original Message -
From: Andrew O'Brien [EMAIL PROTECTED]
To: DIGITALRADIO digitalradio@yahoogroups.com
Sent: Sunday, November 18, 2007 7:10 PM
Subject: [digitalradio] PSK63 activity!
I assume that Skip will be happy. His PSK63 efforts
of a
RTTY signal.
Isn't accomplishing the same job in less bandwidth what we should all be
trying to do in an ever more crowded world?
It is not like adding CW to a phone contest because both RTTY and PSK63 are
keyboard modes. Phone and CW are not.
73, Skip
KH6TY
- Original Message -
From
(either Line input or Mic
input), you can just use the volume control on the transceiver and get any
amount of visibility on the waterfall you want.
73, Skip
KH6TY
- Original Message -
From: Charles Brabham [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Monday, October 29, 2007
#_
Tnx for any help
Dave KB3MOW
73, Skip
KH6TY
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.503 / Virus Database: 269.15.12/1096 - Release Date: 10/27/2007
11:02 AM
. Using PSK63, or even PSK125, there is more than
enough space in 10 kHz of spectrum to handle all the Emcomm communications ARRL
will ever need. We just need to show it can be done. This is why I am working
on this.
73, Skip KH6TY
Rick,
We have four parallel efforts right now. One is to adapt PSKmail for better TTY
operation as opposed to mailbox operations, another is to embed ARQ in fldigi,
another is to rewrite FMpsk to improve decoding and orient it more toward
decentralized Emcomm communications, and lastly, to
for the string, CQ . Any time a CQ
prints on the screen, the background for that station and callsign will turn
from white to red and stand out clearly amongst all other signals.
73, Skip
KH6TY
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