Hi Chas,
The IC-F7000 and the VX-1700 are both in the under $1500 price range.
Bonnie KQ6XA
--- In digitalradio@yahoogroups.com, [EMAIL PROTECTED] wrote:
My personal interest is MARS. If I had a spare $5kUS, I
would likely buy the Codan or the Harris. but to me, that is simply
disgraceful
Can you purchase the IC-F7000 from anyone in the U.S.
I believe that DHS/FEMA and DoD will stay with the Fed-Std/Mil-Std/STANAG for
ALE. Other civilian and NGOs may choose another HF ALE standard.
But if you desire is to be able to contact or even lock-on to DHS/FEMA/DoD/NATO
ALE signals,
frequency hopping and frequency hopping spreas spectrum (FHSS) are two
different technical terms. ALE may use frequency hopping or channel
scanning or changing frequency at some pre-determined or un-determined rate;
but, this IS NOT FHSS.
Let's not mix terms.
Walt/K5YFW
-Original
IMHO, an larger number of Beacon Stations would be more beneficial to
propagation forecasting than any individual station or stations pinging.
Walt/K5YFW
-Original Message-
From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED]
Sent: Tuesday, August 22, 2006 7:45 PM
To:
Thanks for pointing this out Walt.
At this time the FCC has amended
rules to allow FHSS systems in the
unregulated 2.4Ghz band.
At 09:09 AM 8/23/2006, you wrote:
frequency hopping and frequency hopping spreas spectrum (FHSS) are two
different technical terms. ALE may use frequency hopping or
DuBose Walt Civ AETC CONS/LGCA wrote:
IMHO, an larger number of Beacon Stations would
be more beneficial to propagation forecasting
than any individual station or stations pinging.
I agree that a bunch of independent Hams pinging
all over the place looking for better propagation
is a
An HF email system that could operate entirely independently of the
internet (as opposed to using HF links to overcome local-area
internet outages) would require a significant infrastructure. Either
its a mesh, in which case users must be persuaded to keep their nodes
(transceiiver + PC
Harold,
While I have heard of FHSS (Frequency Hopping Spread Spectrum) and
similar concepts of spreading out the modulation over a number of
frequencies for security reasons (type of encryption), that is not what
I referred to. Actually, many of us use SS technology for some of our
You're right that neither ALE nor Beacons scale to 600,000 amateurs
transmitting. But I think it is wrong to say hams shouldn't use ALE and
should use more beacons. Every time I have tried to answer a beacon, I
always get the same RST of 000. People scan with ALE when they want to
talk and
If I were a company technology officer, of a company who's purpose was
developing communications technology...or the technology officer for
amateur radio, I would be very dis-heartened at the data
protocols/modes/modems produces as well as the HF E-Mail applications
developed. None are really
Re: The technical world, and especially amateur radio should rise
above that in concerted efforts to accomplish desired common goals.
A prerequisite for concerted action is to clearly state the goal, and
to have that goal make sense.
To me, pronouncements from inept bureacratic organizations
Hi Dave,
I might point out that the Winlink system is a total HF solution and
operated for many years. The owners of the system felt that this system
was too slow and wanted a system that would operate primarily with
e-mail connectivity. This developed into Winlink 2000 and removed much
of
And we must do more research and testing.
The latest research from university and private research institutions and
industry indicates that high data throughputs in a wide channel, such as a 10
KHz data channel, can be substantially more than the collective throughput of
five 2 KHz channels.
Hi Dave,
At 01:59 PM 8/23/2006, you wrote:
Re: The technical world, and especially amateur radio should rise
above that in concerted efforts to accomplish desired common goals.
Amend to that !
A prerequisite for concerted action is to clearly state the goal, and
to have that goal make sense.
-Original Message-
From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED]
Sent: Wednesday, August 23, 2006 12:59 PM
To: digitalradio@yahoogroups.com
Subject: [digitalradio] Re: PC-ALE Signal Detect Before Transmitting: An
Experiment
[stuff deleted]
...The question is not could such a
I agree that an application that convey can convey email to the
internet via HF would be handy during emergencies or other
disruptions, and during portable operation (though 3G cellular and
WiMax are beginning to reduce the need for the latter). Enabling it
exploit a direct internet connection
Rick,
You asked...Why do the Pactor modes work so well? They have the same
bandwidth, power, and fairly similar coding to sound card modes. Is their
coding something that can not be
implemented on current sound cards in terms of the modulation?
Here may be part of the answer...
Measurements
Oh, I see, Steve. You believe that the internet is insufficiently
reliable, despite the multi-billion dollar investments by telecom
companies and suppliers, governments, and research institutions. Thus
there's an opportunity for amateurs to build a more reliable means of
conveying email thats
Walt, you're going to have to do MUCH better than that if you want
motivate concerted action.
The fact that we CAN do something is irrelevant; the question is
whether we SHOULD. Answering this question generally involves
identifying the value to stakeholders, understanding the costs and
Hi Dave,
You go it.
/s/ Steve, N2CKH
At 01:17 PM 8/23/2006, you wrote:
Oh, I see, Steve. You believe that the internet is insufficiently
reliable
Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org
Other areas of interest:
The MixW Reflector :
It in deed would. That is the reason Pactor and Amtor
work so well. It's the AQR - even with the hi S/N needed.
I got into Amtor in the early days when the KIT BOARD
was over 500 bucks. Ask HB9AVK what he thinks of the
AQR modes and Amtor in general. Or G3GPS. A lot
of us old RTTY'ers played with
-Original Message-
From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED]
Sent: Wednesday, August 23, 2006 3:57 PM
To: digitalradio@yahoogroups.com
Subject: [digitalradio] Re: PC-ALE Signal Detect Before Transmitting: An
Experiment
Oh, I see, Steve. You believe that the internet is
Agree with you Dave. About 99% of the time the internet is reliable.
The weak link however, is the ISP. For example, I live on the coast of
North Carolina along the Pamlico Sound. We are remote, so there are no
cable modems or any such hardwire connections. Our high-speed provider
uses
Or perhaps, ping-pong? As long as we never lose our sense of humor the
hobby will prosper...
Hank
KI4MF
_
From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED]
On Behalf Of expeditionradio
Sent: Tuesday, August 22, 2006 5:31 PM
To: digitalradio@yahoogroups.com
Subject:
What was the motivation for a man to try and circumnavigate the globe in a hot
air balloon?
Why do individuals enter a triathlon or climb a high mountain?
Because its there to do.
There is no stake holders in amateur radio unless you are a supplier of goods
or services or in some other way
Yes, there's opportunity to use digital radio to augment current
communication systems to overcome local outages -- but we don't need
to duplicate the internet to accomplish this.
73,
Dave, AA6YQ
--- In digitalradio@yahoogroups.com, Harold Aaron [EMAIL PROTECTED] wrote:
Agree
AA6YQ comments below
--- In digitalradio@yahoogroups.com, DuBose Walt Civ AETC
CONS/LGCA [EMAIL PROTECTED] wrote:
What was the motivation for a man to try and circumnavigate the
globe in a hot air balloon?
Why do individuals enter a triathlon or climb a high mountain?
Because its there to
On Tue, 22 Aug 2006 21:40:37 -, expeditionradio
[EMAIL PROTECTED] wrote:
The IC-F7000 and the VX-1700 are both in the under $1500 price range.
http://www.icomamerica.com/brochures/ic-f7000.pdf
hmmm
PENDING FCC TYPE ACCEPTANCE
THIS DEVICE HAS NOT BEEN APPROVED
BY THE F.C.C. THIS DEVICE IS
Nice Steve ;)
73 de LA5VNA
Steve Hajducek skrev:
Hi Dave,
You go it.
/s/ Steve, N2CKH
At 01:17 PM 8/23/2006, you wrote:
Oh, I see, Steve. You believe that the internet is insufficiently
reliable
Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org
Other
Hank- your posts seem to ALWAYS come through with a high Priority Symbol
in the header. Do you Think the post below rates immediate attention over
others? Or is this an overlooked feature?
Bill
At 06:36 PM 8/22/2006 -0500, you wrote:
Or perhaps, ping-pong? As long as we never lose our sense
Mark,
If what you say was true, it would be easy to have sound card modes that
compete with Pactor modes. From studies that I have seen, Amtor can work
down around zero db S/N. Same with Pactor I. Some claim a bit below 0
db. In fact one recent test claimed that RTTY was better than PSK31 for
Walt's suggestion is to replicate the internet's worldwide email
transport capability. After getting beyond because we can, his
rationale is to protect against cyber-attack, though he has yet to
reveal why a system constructed by amateurs would not be equally
vulnerable to cyber-attack, or why
Hi Walt,
Can you purchase the IC-F7000 from anyone in the U.S.
?
IC-F7000 ALE transceiver has not been released by Icom in USA yet,
but it has been available in the rest of the world for several
years. A few hams have imported them to USA.
VX-1700 ALE transceiver is available from Vertex
To be onest, Walt, I don't see Rick's claim of such a good performance
level for MT-63. If you look at his presentation on comparing several
modes with Pactor, at:
http://winlink.org/Presentations/RFfootprints.PDF
he seems to suggest that all the non-ARQ sound card modes (e.g, PSK-31,
MT-63)
At 04:29 PM 8/23/2006, you wrote:
It in deed would. That is the reason Pactor and Amtor
work so well. It's the AQR - even with the hi S/N needed.
There is some value to ARQ, I wonder how we would quantify the
advantage? In a point to point link I think it would be easy, but in a
point to
Note also in Figure 6, the real world test by using distance on 80
meters daytime. The worst performance was by Amtor, followed by Pactor 1
and closely by PSK31. The best performer was RTTY at these slow speeds
and he gives his explanation as why he believes this occurs. It sounds
reasonable to
We have plenty of oddball ham-only HF methods for hams to play hobby
with. But very little attention is being paid to interoperation with
other radio services, for initial calling, voice, image, or data.
I support the 5066 standard in amateur radio. It is time for hams to
step up to the plate,
Hi Mark,
The ARQ is really important. You really should have this for serious
messaging via RF and must have it if you want to interface with a
mailbox system or internet. Even one bad character trashes everything
when negotiating a menu. Those who are OT's with Amtor know what I mean.
I used
At 10:33 PM 8/23/2006, you wrote:
I am not very knowledgeable on CRF (Crest Factors). Can you give us an
idea of converting peak power/average power into CRF?
Using powers, crest factor = Peak Instantaneous Power / Average Power. A
more piratical way of measuring crest factor is (PEP/Average
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