[digitalradio] JT65A HF query/observations

2007-05-30 Thread Brian A
I've been playing around with this on 20M.

The new version which does the decoding starting at 48 seconds is a
big help.

Of the the 25 contacts I've made all were clearly audible.  All could
have been worked on CW with no difficulty.  They could have been
worked on PSK or other such modes too--much more quickly.  Most came
from answers to my CQ's. 

Is this the experience of others? 

So what is the benefit on HF?  

I clearly don't see this as being the future of HF ham radio.  It
isn't the killer ap. (I'm sure the MS, moonbounce and VHF capabilities
are great and that was the original design objective)

I'm a bit perplexed that stations which are S6 and above show up at
-6db or so on the display.  I know what it is editing.  It is a pretty
useless number to most users.  What I want to know is: how far below
the current noise floor is the signal that I'm now working.  It would
seem that such a below the noise number could be determined and
editied.  Isn't this what all users (HF and V/UHF) want to know?

73 de Brian/K3KO



Re: [digitalradio] JT65A HF query/observations

2007-05-30 Thread Rick
I too have been perplexed why these modes that were developed for weak 
signals on VHF and above and only have the most meager rudimentary 
exchange,  would have any value on HF, relative to already existing weak 
signal modes. Perhaps because it seemed new, some focused on trying it 
out?

What I still would like to see is a sound card ARQ modes that is 
scaleable in speed and also can work with weak signals, QSB, etc.

73,

Rick, KV9U



Brian A wrote:
 I've been playing around with this on 20M.

 The new version which does the decoding starting at 48 seconds is a
 big help.

 Of the the 25 contacts I've made all were clearly audible.  All could
 have been worked on CW with no difficulty.  They could have been
 worked on PSK or other such modes too--much more quickly.  Most came
 from answers to my CQ's. 

 Is this the experience of others? 

 So what is the benefit on HF?  

 I clearly don't see this as being the future of HF ham radio.  It
 isn't the killer ap. (I'm sure the MS, moonbounce and VHF capabilities
 are great and that was the original design objective)

 I'm a bit perplexed that stations which are S6 and above show up at
 -6db or so on the display.  I know what it is editing.  It is a pretty
 useless number to most users.  What I want to know is: how far below
 the current noise floor is the signal that I'm now working.  It would
 seem that such a below the noise number could be determined and
 editied.  Isn't this what all users (HF and V/UHF) want to know?

 73 de Brian/K3KO

   



Re: [digitalradio] JT65A HF query/observations

2007-05-30 Thread Danny Douglas
The excitement of using the JT65 program on HF is NOT for those signals you
can clearly hear and probably operate with another mode, but for those times
that the propagation shows not to be there, you dont hear anything but
possibly a slight raise in static on a band, etc.  Then you can put this
mode up, leave it alone, and see what pops out.  Its for playing not
really trying to communicate.  FYI  if anyone in P5 wants to work it, plse
do so.  Whether we can hear you or not, we will be there.

Danny Douglas N7DC
ex WN5QMX ET2US WA5UKR ET3USA
SV0WPP VS6DD N7DC/YV5 G5CTB all
DX 2-6 years each
.
QSL LOTW-buro- direct
As courtesy I upload to eQSL but if you
use that - also pls upload to LOTW
or hard card.

moderator  [EMAIL PROTECTED]
moderator http://groups.yahoo.com/group/DXandTalk
- Original Message - 
From: Rick [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Thursday, May 31, 2007 8:58 AM
Subject: Re: [digitalradio] JT65A HF query/observations


 I too have been perplexed why these modes that were developed for weak
 signals on VHF and above and only have the most meager rudimentary
 exchange,  would have any value on HF, relative to already existing weak
 signal modes. Perhaps because it seemed new, some focused on trying it
 out?

 What I still would like to see is a sound card ARQ modes that is
 scaleable in speed and also can work with weak signals, QSB, etc.

 73,

 Rick, KV9U



 Brian A wrote:
  I've been playing around with this on 20M.
 
  The new version which does the decoding starting at 48 seconds is a
  big help.
 
  Of the the 25 contacts I've made all were clearly audible.  All could
  have been worked on CW with no difficulty.  They could have been
  worked on PSK or other such modes too--much more quickly.  Most came
  from answers to my CQ's.
 
  Is this the experience of others?
 
  So what is the benefit on HF?
 
  I clearly don't see this as being the future of HF ham radio.  It
  isn't the killer ap. (I'm sure the MS, moonbounce and VHF capabilities
  are great and that was the original design objective)
 
  I'm a bit perplexed that stations which are S6 and above show up at
  -6db or so on the display.  I know what it is editing.  It is a pretty
  useless number to most users.  What I want to know is: how far below
  the current noise floor is the signal that I'm now working.  It would
  seem that such a below the noise number could be determined and
  editied.  Isn't this what all users (HF and V/UHF) want to know?
 
  73 de Brian/K3KO
 
 



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 http://www.obriensweb.com/drsked/drsked.php

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1:01 PM





Re: [digitalradio] JT65A HF query/observations

2007-05-30 Thread Andrew O'Brien

All good comments.  I agree with Danny AND Rick.  I think I can safely say
that this group is responsible for the sudden explosion of JT65A activity on
HF, remember it is just one month old as a common HF mode.

I'm perplexed too, I can find JT65A activity almost 24 hours per day but
rarely hear ALE and Olivia these days.  I hear Hell and MFSK16 but not as
much as JT65A, by a big margin.

As Danny correctly identified , JT65A, is simply amazing for extra weak
signal detection.  Actually, I am not sure if it's the mode or just the WSJT
software, maybe the combination.  I think however, that if someone like
Patrick developed software that would perform Olivia , ALE, DominoEx, etc ,
etc...in the same manner as WSJT, hams would use it . Thus, I think we have
found that many hams enjoy a software product that enables precisely timed
beacons with simple responses to validate reception and a legitimate
exchange.

In summary, JT65AWSJT performs well under weak conditions and the timing
divisions are attractive to experimenting hams.  Give the same ability to
Olivia and Dominoex, easily, and I am sure use of those modes would
increase.


Andy K3UK

On 5/30/07, Danny Douglas [EMAIL PROTECTED] wrote:


  The excitement of using the JT65 program on HF is NOT for those signals
you
can clearly hear and probably operate with another mode, but for those
times
that the propagation shows not to be there, you dont hear anything but
possibly a slight raise in static on a band, etc. Then you can put this
mode up, leave it alone, and see what pops out. Its for playing not
really trying to communicate. FYI if anyone in P5 wants to work it, plse
do so. Whether we can hear you or not, we will be there.

Danny Douglas N7DC
ex WN5QMX ET2US WA5UKR ET3USA
SV0WPP VS6DD N7DC/YV5 G5CTB all
DX 2-6 years each
.
QSL LOTW-buro- direct
As courtesy I upload to eQSL but if you
use that - also pls upload to LOTW
or hard card.

moderator [EMAIL PROTECTED] digital_modes%40yahoogroups.com
moderator http://groups.yahoo.com/group/DXandTalk
- Original Message -
From: Rick [EMAIL PROTECTED] mrfarm%40frontiernet.net
To: digitalradio@yahoogroups.com digitalradio%40yahoogroups.com
Sent: Thursday, May 31, 2007 8:58 AM
Subject: Re: [digitalradio] JT65A HF query/observations

 I too have been perplexed why these modes that were developed for weak
 signals on VHF and above and only have the most meager rudimentary
 exchange, would have any value on HF, relative to already existing weak
 signal modes. Perhaps because it seemed new, some focused on trying it
 out?

 What I still would like to see is a sound card ARQ modes that is
 scaleable in speed and also can work with weak signals, QSB, etc.

 73,

 Rick, KV9U



 Brian A wrote:
  I've been playing around with this on 20M.
 
  The new version which does the decoding starting at 48 seconds is a
  big help.
 
  Of the the 25 contacts I've made all were clearly audible. All could
  have been worked on CW with no difficulty. They could have been
  worked on PSK or other such modes too--much more quickly. Most came
  from answers to my CQ's.
 
  Is this the experience of others?
 
  So what is the benefit on HF?
 
  I clearly don't see this as being the future of HF ham radio. It
  isn't the killer ap. (I'm sure the MS, moonbounce and VHF capabilities
  are great and that was the original design objective)
 
  I'm a bit perplexed that stations which are S6 and above show up at
  -6db or so on the display. I know what it is editing. It is a pretty
  useless number to most users. What I want to know is: how far below
  the current noise floor is the signal that I'm now working. It would
  seem that such a below the noise number could be determined and
  editied. Isn't this what all users (HF and V/UHF) want to know?
 
  73 de Brian/K3KO
 
 



 Announce your digital presence via our Interactive Sked Page at
 http://www.obriensweb.com/drsked/drsked.php

 Yahoo! Groups Links





 --
 No virus found in this incoming message.
 Checked by AVG Free Edition.
 Version: 7.5.472 / Virus Database: 269.8.3/824 - Release Date: 5/29/2007
1:01 PM