Re: [digitalradio] The Basics On WINMOR

2009-02-24 Thread John Becker, WØJAB
Rick
I'm a bit confused over your long post.
But I can say that he has said that it's not
a replacement for P2 or P3 or ever will be.

John



Re: [digitalradio] The Basics On WINMOR

2009-02-24 Thread Rick W
The beta and software being developed in the foreseeable future will be 
focused on Winlink 2000. It won't have a peer to peer function, unless 
it is temporarily put there as we had with the SCAMP protocol some years 
ago. Even then, they planned to remove PtoP once the software was made 
available for general use.

Eventually the protocol will be tested and deployed and as Rick has 
pointed out:

"Remember that WINMOR was not designed to be just another sound card mode
like PSK31 or Domino. It is designed for binary message forwarding and is
part of an entire email system (WL2K) and for it to work and be properly
evaluated all the parts that integrate the new mode must also be built and
tested."

Also, he says he will "probably make a DLL of WINMOR available for 
others to use."

Of course all software developed by the Winlink team has been Windows 
centric and will continue to be. There has been work done by a Linux 
developer who has been able to provide Telpac and now RMSpacket clients 
for Winlink 2000 and perhaps he will be able to make an open source 
Linux version of WINMOR.

The final design won't be ready until real world beta testing is done.

The thing that struck me the most is that he sees Pactor becoming 
obsolete since it is not that good of a mode compared with WINMOR. Of 
course Pactor 2 and Pactor 3 are much more competitive with any sound 
card mode for the forseeable future.

So the beta testing will be operating the Winlink 2000 system as you 
normally would, but using a sound card mode in place of P2 or P3. 
Ideally, everything else will be about the same. It should be similar to 
how SCAMP was beta tested, except when conditions go near to zero dB and 
maybe even a bit below zero dB SNR, the mode will continue working. 
SCAMP failed much below +8 or +10 dB SNR.

The 4 FSK mode intrigues me the most as having a robust mode that can 
handle at least moderate ISI and Doppler along with the 15 or so dB 
capabilities for weaker signals.

As a comparison, the RFSM sound card modems, although they are based on 
MIL-STD-188-110A, did not implement the more robust modes, particularly 
the 75 bps mode designed for the worst conditions. It would have been 
fascinating to see how well (or not) that mode works. A friend of mine 
who uses this stuff regularly for military applications says that these 
"ALE" type systems are not that great. But he also does not have any 
experience with ham HF modes. If anyone else does have the experience 
with both it would be appreciated if they would share what they have 
found, especially in terms of robustness and throughput.

73,

Rick, KV9U





Andrew O'Brien wrote:
> I am a member of the WINMOR reflector and I am encouraged by the
> author's intentions.  However, since I have avoided Pactor and used
> thinks like AirMail and Winlink very little over the past couple of
> years, I am not sure just what the intended beta use of WINMOR will
> be.  I have seen the explanation but it implies knowledge of the
> current P3 emcomm system, can someone break down what they are
> expecting from WINMOR OTHER than it being a soundcard based mode ?
>
> Andy K3UK
>
>
>
> 
>
> Announce your digital presence via our Interactive Sked Page at
> http://www.obriensweb.com/sked
>
>
> Recommended software:  Winwarbler, FLDIGI, DM780, or Multipsk
>
>
>
> Yahoo! Groups Links
>
>
>
> 
>
>
> No virus found in this incoming message.
> Checked by AVG - www.avg.com 
> Version: 8.0.237 / Virus Database: 270.11.3/1969 - Release Date: 02/24/09 
> 06:43:00
>
>   



RE: [digitalradio] Using CTSS on a digipeater?

2009-02-24 Thread Bob Donnell
I'm with Vince on a number of points.  

If there's really a serious emergency, that will benefit from packet radio,
chances are that the hobbiest hams are not going to be on the air, unless
it's in support of your goals.  I think it's far better to have the local
community exercising your digipeater for you, so you know if it fails.

If you're truly insistent on having the ability to lock out stations, it'd
be better to do a couple of things to achieve that:

1) Use a TNC that allows performing over-the-air settings modifications

2) When an event happens, and you determine that the level of emcomm traffic
vs. regular user traffic requires it, set up a beacon that frequently (every
minute or two) informs all users that the digipeater has been configured for
emcomm operations, and create a buddy list of stations that are allowed to
connect and digipeat via the digipeater, and implement it.  Another
alternative that can be done remotely is to change the "MYDIGI" setting to
respond to something else, but that's only a short-term fix, since anyone
that's monitoring can see the digipeater callsign.

Perhaps the most important thing, is if the operation is of a limited
period, remember to set operations back to normal operations before shutting
operations down, or when the emcomm traffic volume is reduced enough to
support normal operations.

>From a technical perspective, using CTCSS as an operational modifier is a
poor solution, for the reason Vince mentioned, and additionally, depending
on the TNC and radio combination, having the the CTCSS tone present at the
input to the TNC may cause it to make more reception errors than if it's not
present.  Also, anything that delays the digipeater (especially) from being
able to tell that the channel is busy, and that to wait for the channel to
clear before transmitting, is going to kill performance and require many
more retries than leaving the digipeater open.

Hope that helps!

73, Bob, KD7NM  

-Original Message-
From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com] On
Behalf Of Terry Breitenfeldt
Sent: Sunday, February 22, 2009 11:37 PM
To: digitalradio@yahoogroups.com
Subject: [digitalradio] Using CTSS on a digipeater?

If I wanted to setup a "closed" Digipreater on 145.09 Mhz on a high mountain
peak, so that I could limit activity to only ECOM traffic, would the use of
a CTSS tone decode be a viable option?  Would a CTSS tone interfere with
Packet operations?  
 





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


Recommended software:  Winwarbler, FLDIGI, DM780, or Multipsk



Yahoo! Groups Links







[digitalradio] Re: Newbie looking for a bbs packet radio

2009-02-24 Thread Andrew O'Brien
Hugo, Your English is good!

Did you try PSKMAIL?  That may help, or perhaps Multipsk's packet
functions.

Andy K3UK


--- In digitalradio@yahoogroups.com, Hugo Correa Sena 
wrote:
>
> Dear friends,
> 
> I´d like some help in a simple (not to me, HI) project. I´d like to
try of
> putting in the air a station BBS packet radio (I think that´s the
name) just
> to send/recieve personal messenger, little files and general
messenger (like
> QTC). Later I´ll connect in others net
> 
> The big objective of this project is start interesting in Amateur
radio of
> digital modes in VHF. As not activitie, I´d like to start with
programs to
> emulate tnc and baycom modems (like as mixW does, I supose).
> 
> Supose again that this project is divided in two poles: server and user.
> 
> So my ask for you is some programs (I´ll appreciate graphics
programs) to
> use on this task.
> 
> Thanks for help and sorry for bad english
> 
> -- 
> Hugo Sena
> 
> PP8HS
> PX8C1546
> http://pp8hs.110mb.com
>




[digitalradio] Newbie looking for a bbs packet radio

2009-02-24 Thread Hugo Correa Sena
Dear friends,

I´d like some help in a simple (not to me, HI) project. I´d like to try of
putting in the air a station BBS packet radio (I think that´s the name) just
to send/recieve personal messenger, little files and general messenger (like
QTC). Later I´ll connect in others net

The big objective of this project is start interesting in Amateur radio of
digital modes in VHF. As not activitie, I´d like to start with programs to
emulate tnc and baycom modems (like as mixW does, I supose).

Supose again that this project is divided in two poles: server and user.

So my ask for you is some programs (I´ll appreciate graphics programs) to
use on this task.

Thanks for help and sorry for bad english

-- 
Hugo Sena

PP8HS
PX8C1546
http://pp8hs.110mb.com


Re: [digitalradio] SCS PTC with P3 Uses ?

2009-02-24 Thread Theodore A. antanaitis
To quote from a response given by Rick Muething on a different group:

"WINMOR sound card mode. Probably shareware model. Will require a decent 
sound card and isolated sound card interface ... WINMOR should give better 
performance than P1 but probably not as good as P2/P3. This is very complex 
software so I would not bet on it being stable for at least 6 months."

Not sure how much to read into use of term 'shareware' versus freeware or 
open source.

Also, considering developers are major forces in Winlink, I would not be 
surprised if WINMOR is rolled out initially as a Winlink HF comms package 
developed using Windows Net software.

Ted WA7ZZB

- Original Message - 
From: "Bill Vodall WA7NWP" 
To: 
Sent: Tuesday, February 24, 2009 9:10 AM
Subject: Re: [digitalradio] SCS PTC with P3 Uses ?


>>> Over the past couple of weeks I have been testing a SCS PTC2 usb
>> modem with
>>> a pactor3 license, and have come away amazed and humbled by what
>> this thing
>>> can do.
>>
>> Thanks for sharing this John. Since I have only a passing interest in
>> emcomms, how is a SCS PTC2 with P3 for just basic ham communications?
>
>
> It'll be interesting to see what external hooks, if any, will be
> present with Winmor.  With the SCS TNC's we can do UUCP (basic Linux)
> or even TCP communications on HF.
>
> I'm doing a bit of dreaming about the next significant radio toy.  SCS
> TNC or ID1?I think there's far more ham opportunities with a P3
> TNC -- specially now that JNOS supports the hardware.
>
> 73
> Bill - WA7NWP
>
>
> 
>
> Announce your digital presence via our Interactive Sked Page at
> http://www.obriensweb.com/sked
>
>
> Recommended software:  Winwarbler, FLDIGI, DM780, or Multipsk
>
>
>
> Yahoo! Groups Links
>
>
>



RE: [digitalradio] on another note

2009-02-24 Thread John Bradley
 

"I don't think it would be technically very difficult to do something
equivalent to P3 with sound cards. I think that it would even possible to do
much better with, for example, multi-users protocol."

 

RFSM8000 has come as close as anything so far, but it's weakness was
operating well under poor conditions (read normally poor these days)

 

"The problem is the time necessary to do this. An amateur can work (with
pleasure and passion of course), let's say a day per week, when a company
can make work a small team 5 days a week. Now an amateur project must be
short in time (several months at a maximum) as it is done for fun. Working
on the same project during years seems very difficult (and surely boring)
for amateurs."

 

No kidding.. it is amazing and very appreciated with what you and other
software authors have done, and is especially important when it is done as a
hobby.

 

 

"Another point is that the number of Hams really interested in ARQ modes is
very weak..."

 

I can't answer that , outside of the fact there are a pile of winlink users.
Think you might underestimate the number of folks interested in ARQ
soundcard modes, and maybe this is an opportunity for Andy to do a survey on
his website?

 

 

"Note: have tests on the minimum S/N versus the data rate done, for pactot
P2 and P3? (as it is difficult to trust commercial data) "

 

don't know, but think so . but my ear tells me it works better than OLIVIA,
which is about the top of the heap right now. I cannot hear the other
station and yet the connect runs at fast speed.

 

John

VE5MU

 



Re: [digitalradio] Where are we with Digital Voice ?

2009-02-24 Thread John Becker, WØJAB
Me.
Software free. I'm a hardware type guy.

At 03:54 PM 2/24/2009, you wrote:
>Since the Melp codec issues reared their ugly head, what is happening
>with digital voice these days?  Other than the weekend North American
>20M net, who else is using it ?  What is the latest software of choice ?
>
>Andy K3UK
>
>
>
>
>
>
>Announce your digital presence via our Interactive Sked Page at
>http://www.obriensweb.com/sked
>
>
>Recommended software:  Winwarbler, FLDIGI, DM780, or Multipsk
>
>
>
>Yahoo! Groups Links
>
>
>


RE: [digitalradio] The Basics On WINMOR

2009-02-24 Thread David Little
Andy,
 
It is a soundcard ARQ mode.  
 
It will allow a more economical way to access the Winlink 2000 system,
and give a higher through-put than Pactor 1
 
There will probably be other uses, but I believe that to be the prime
reason for it's development.
 
I don't know the nuts and bolts of it, but it has a lot to do with
taming the timing cycles needed for a soundcard to negotiate a ARQ
connection and handle binary (compressed) data.  In the past, there was
too much overhead for this to be done with a sound card on a Windows
machine; other than for SMS Text-Based messaging.
 
The above is probably a poor explanation of what it is and what it does,
but I think it captures the intent.
 
David
KD4NUE
 
 
 
 
 

-Original Message-
From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com]
On Behalf Of Andrew O'Brien
Sent: Tuesday, February 24, 2009 5:00 PM
To: digitalradio@yahoogroups.com
Subject: [digitalradio] The Basics On WINMOR



I am a member of the WINMOR reflector and I am encouraged by the
author's intentions. However, since I have avoided Pactor and used
thinks like AirMail and Winlink very little over the past couple of
years, I am not sure just what the intended beta use of WINMOR will
be. I have seen the explanation but it implies knowledge of the
current P3 emcomm system, can someone break down what they are
expecting from WINMOR OTHER than it being a soundcard based mode ?

Andy K3UK







Re: [digitalradio] on another note

2009-02-24 Thread Patrick Lindecker
Hello John,

I don't think it would be technically very difficult to do something equivalent 
to P3 with sound cards. I think that it would even possible to do much better 
with, for example, multi-users protocol.

The problem is the time necessary to do this. An amateur can work (with 
pleasure and passion of course), let's say a day per week, when a company can 
make work a small team 5 days a week. Now an amateur project must be short in 
time (several months at a maximum) as it is done for fun. Working on the same 
project during years seems very difficult (and surely boring) for amateurs. 

Another point is that the number of Hams really interested in ARQ modes is very 
weak...

73
Patrick 

Note: have tests on the minimum S/N versus the data rate done, for pactot P2 
and P3? (as it is difficult to trust commercial data) 

  - Original Message - 
  From: John Bradley 
  To: digitalradio@yahoogroups.com ; hfl...@yahoogroups.com 
  Cc: multi...@yahoogroups.com 
  Sent: Monday, February 23, 2009 9:47 PM
  Subject: [digitalradio] on another note


   As many of you know, I have been very active with digital communications 
over the past number of years, eagerly testing the latest and greatest, and was 
honored when Andy gave me recognition last year in with his digital awards. I 
have been and continue to be a strong proponent of digital communications 
within the emergency services field, have worked in emergency services as a 
planner, communicator, trainer and consultant. This, as well as a passion for 
Search and Rescue is a summary of most of my ham radio activities over the past 
20 years.

   

  I have been known to be somewhat outspoken at times, I have locked horns with 
Bonnie more than once, I have had interesting off post political commentaries 
with Roger the lawyer, and from time to time, been called anti American, anti 
Canadian, Anti Ham, anti pactor, and anti auntie, even. I have gleefully 
participated in some of the lively debates on these posts and have come awfully 
close to being punted by moderator Andy. So you are asking yourself by now, 
where is this crazy Cannuck going with all this??

   

  Simply put, ladies and gentlemen, I have seen the light ( actually a whole 
mess of little ones but who is counting)

   

  Over the past couple of weeks I have been testing a SCS PTC2 usb modem with a 
pactor3 license, and have come away amazed and humbled by what this thing can 
do. It is faster than ANYTHING else I have tried, including RFSM8000, and works 
further into the weeds than anything else I have tried. I have connected to a 
RMS station midday close to 1000 miles away on what I would call a "dead" band. 
I have connected to RMS stations at least 500 miles from me on 80M well into 
mid morning, and resumed these connections by about 3PM , still when nothing 
else could be heard on the band. 

   

  I had in the past heard the claims that this modem would work 10db into the 
noise. At the time my reactions was "yah,right!!!" but it really does. If you 
have a chance, try it out . So my thinking has undergone an abrupt change of 
direction, from using soundcard modes with internet access, to using P3 for 
primary links and sound card modes for the last mile or so.. and would like to 
hear other opinions.

   

  we all know the givens about pactor: the modems are expensive, the operators 
insensitive, proprietary hardware and software etc etc.  but how could this 
mode be incorporated with current soundcard software? 

   

  John

  VE5MU




  

[digitalradio] The Basics On WINMOR

2009-02-24 Thread Andrew O'Brien
I am a member of the WINMOR reflector and I am encouraged by the
author's intentions.  However, since I have avoided Pactor and used
thinks like AirMail and Winlink very little over the past couple of
years, I am not sure just what the intended beta use of WINMOR will
be.  I have seen the explanation but it implies knowledge of the
current P3 emcomm system, can someone break down what they are
expecting from WINMOR OTHER than it being a soundcard based mode ?

Andy K3UK



[digitalradio] Where are we with Digital Voice ?

2009-02-24 Thread Andrew O'Brien
Since the Melp codec issues reared their ugly head, what is happening
with digital voice these days?  Other than the weekend North American
20M net, who else is using it ?  What is the latest software of choice ?

Andy K3UK




Re: [digitalradio] Harmonic of some Sort on 20mtrs, includes a Computer Power Supply Interference Issue.

2009-02-24 Thread Siegfried Jackstien
maybe a switched power device ... can be your powertransformer of your mobile 
phone
or of your router your printer etc  can also be the tv set of your neighbor
hard to find
dg9bfc
  - Original Message - 
  From: Gmail - Kevin, Natalia, Stacey & Rochelle 
  To: digitalradio@yahoogroups.com ; kenwoodts-...@yahoogroups.com 
  Sent: Tuesday, February 24, 2009 9:38 AM
  Subject: [digitalradio] Harmonic of some Sort on 20mtrs, includes a Computer 
Power Supply Interference Issue.



  HI All,

  I am hoping someone has come across this problem I am having with my 
TS-480S/AT.
  It appears to be mainly on 20mtrs and has a frequency step of 61Khz.
  It appears on 14.094, 14.155, 14.216, 14.277, etc. I have checked it right up 
and down, and it does get quieter as it moves out of the 20mtr band or the 
antenna tune.
  It is around a signal strength of S7, so unless there is a strong station on 
these freqs I stay clear of them. I don't remember this issue when I had the 
radio in the car and operated mobile.
  It seems to disappear when I remove the antenna, so I am making the 
assumption that it is coming in thorugh the antenna.
  Things I have tried include putting the radio onto a 12 battery supply and 
switching off all power into the house. This inlcuded turning off the mains. 
The interference was still there.
  I am in the country, so there is not too much housing around, but I do have a 
neigbour about 25mtrs away. There will be no point going next door and seeing 
if this is where it's coming from (read into that as you can).

  I do have another noise which moves between 14.065 and 14.091, (on both 
radios) which I did find out ot be my computer in the radio room. Even with the 
computer off it appears the switch-mode is still alive because when I turned 
the power off at the wall, after about 10secs the noise is gone and the freq is 
now usable, it does not remove the problem I have above. As I mentioned I 
turned everything off at the mains, still there.
  I will post this on these two groups as it deals with both the radio and when 
using digital modes.
  Is there some way to quieten the power supply so I can use the computer when 
operating my radio/s?

  I have a TS-830 on the desk but I must confess I have not tried to see if it 
is on it (just thought about it). Might give that a go on my next rest days, 
actually I just went and checked it now (while I was thinking about it) and the 
61Khz step noise is on the TS-830 too, so it is not the radio. So it is coming 
from some man-made device.

  If anyone ahs any ideas I'd be grateful, trying to get back onto the bands 
after about 3 years of inactivity. Must of lost my nerve to call CQ and reply 
to stations, soes not seem as easy now-adays, maybe getting a bit old in the 
tooth, Hi.

  Regards and Thanks
  Kevin, ZL1KFM.


   
  Get Skype and call me for free.

   


  

sparc_nz
Description: Binary data


RE: [digitalradio] SCS PTC with P3 Uses ?

2009-02-24 Thread John Becker, WØJAB
I have to agree with John.
During the flooding along the Mississippi river last spring
2M was just about useless. Since I had a HF set up in 
my pickup with a VX1700 mounted all I had to do was set
up the laptop and SCS modem. Most traffic was passed 
to either a VE3 station on 40M or 30M or to a station in
Florida. Passing traffic to a cell device was very easy.

Win2K to the rescue.

As far as using P2 and P3 for QSO's. Do it a lot. Most of
my QSO's are RTTY or Pactor. Find it very easy to snag
a connect.

If anyone is interested the best spotting site I have found
for Pactor and Amtor had been -

http://hamspots.net/spotit.php?g=p

John




At 09:58 AM 2/24/2009, you wrote:
>I think that a 5000km pactor contact under poor band conditions would be 
>relatively easy to do. I have worked an east coast (VE1) RMS station on 20M 
>with me running about 25 watts. That station would be close to being 5000km or 
>3000 miles away from my QTH
>
>Do to this , a DX station would have to sit on an agreed frequency, since 
>pactor is barely audible , or not at all under poor band conditions and would 
>be tough to tune . Pactor really does work well into the noise but the secret 
>also is that the mailbox (RMS) stations are monitoring a known set of 
>frequencies, thus easy to find. 
>
>Im always up for trying anything at least once, so that if there are others 
>out there that want to try a long keyboard to keyboard contact, let me know
>
>John
>
>VE5MU



Re: [digitalradio] SCS PTC with P3 Uses ?

2009-02-24 Thread Bill Vodall WA7NWP
>> Over the past couple of weeks I have been testing a SCS PTC2 usb
> modem with
>> a pactor3 license, and have come away amazed and humbled by what
> this thing
>> can do.
>
> Thanks for sharing this John. Since I have only a passing interest in
> emcomms, how is a SCS PTC2 with P3 for just basic ham communications?


It'll be interesting to see what external hooks, if any, will be
present with Winmor.  With the SCS TNC's we can do UUCP (basic Linux)
or even TCP communications on HF.

I'm doing a bit of dreaming about the next significant radio toy.  SCS
TNC or ID1?I think there's far more ham opportunities with a P3
TNC -- specially now that JNOS supports the hardware.

73
Bill - WA7NWP


[digitalradio] Re: Harmonic of some Sort on 20mtrs, includes a Computer Power Supply Interference Issue.

2009-02-24 Thread jhaynesatalumni
It can be awfully helpful at times to have a portable
battery powered shortwave receiver so you can listen to
the interference while you are walking around, and with
all your AC power shut off.




RE: [digitalradio] SCS PTC with P3 Uses ?

2009-02-24 Thread John Bradley
Andy wrote;

", how is a SCS PTC2 with P3 for just basic ham communications?
Could it be used for weak signal DXing ? I realize that DXpeditions
are never going to use it, but how about us average hams who might
like to work keyboard QSOs at 5000+ KM on 20 metres with poor band
conditions ?"



I think that a 5000km pactor contact under poor band conditions would be
relatively easy to do. I have worked an east coast (VE1) RMS station on 20M
with me running about 25 watts. That station would be close to being 5000km
or 3000 miles away from my QTH

Do to this , a DX station would have to sit on an agreed frequency, since
pactor is barely audible , or not at all under poor band conditions and
would be tough to tune . Pactor really does work well into the noise but the
secret also is that the mailbox (RMS) stations are monitoring a known set of
frequencies, thus easy to find. 

I'm always up for trying anything at least once, so that if there are others
out there that want to try a long keyboard to keyboard contact, let me know

John

VE5MU

 

 

 

 

 



Re: [digitalradio] Harmonic of some Sort on 20mtrs, includes a Computer Power Supply Interference Issue.

2009-02-24 Thread Gmail - Kevin, Natalia, Stacey & Rochelle
Hi Ian,

Not that I am aware of. It does not sound like the HV spark that I have heard 
from a electric fence unit.

Regards
Kevin
 
Get Skype and call me for free.


  - Original Message - 
  From: Ian Wade 
  To: digitalradio@yahoogroups.com 
  Sent: Tuesday, February 24, 2009 9:50 PM
  Subject: Re: [digitalradio] Harmonic of some Sort on 20mtrs, includes a 
Computer Power Supply Interference Issue.


  From: "Gmail - Kevin, Natalia, Stacey & Rochelle" 
  Date: Tue, 24 Feb 2009 Time: 21:38:26

  >HI All,
  > 
  >I am hoping someone has come across this problem I am having with my
  >TS-480S/AT.

  [Snip]

  Does your neighbour have an electric fence?

  -- 
  73
  Ian, G3NRW


  

sparc_nz
Description: Binary data


[digitalradio] SCS PTC with P3 Uses ?

2009-02-24 Thread Andrew O'Brien
--- In digitalradio@yahoogroups.com, John Bradley  wrote:

> Over the past couple of weeks I have been testing a SCS PTC2 usb
modem with
> a pactor3 license, and have come away amazed and humbled by what
this thing
> can do. 

Thanks for sharing this John.  Since I have only a passing interest in
emcomms, how is a SCS PTC2 with P3 for just basic ham communications?
 Could it be used for weak signal DXing ?   I realize that DXpeditions
are never going to use it,  but how about us average hams who might
like to work keyboard QSOs  at  5000+ KM on 20 metres with poor band
conditions ?

Andy K3UK





Re: [digitalradio] Harmonic of some Sort on 20mtrs, includes a Computer Power Supply Interference Issue.

2009-02-24 Thread Ian Wade
From: "Gmail - Kevin, Natalia, Stacey & Rochelle" 
Date: Tue, 24 Feb 2009   Time: 21:38:26

>HI All,
> 
>I am hoping someone has come across this problem I am having with my
>TS-480S/AT.

[Snip]

Does your neighbour have an electric fence?

-- 
73
Ian, G3NRW
































[digitalradio] Harmonic of some Sort on 20mtrs, includes a Computer Power Supply Interference Issue.

2009-02-24 Thread Gmail - Kevin, Natalia, Stacey & Rochelle
HI All,

I am hoping someone has come across this problem I am having with my TS-480S/AT.
It appears to be mainly on 20mtrs and has a frequency step of 61Khz.
It appears on 14.094, 14.155, 14.216, 14.277, etc. I have checked it right up 
and down, and it does get quieter as it moves out of the 20mtr band or the 
antenna tune.
It is around a signal strength of S7, so unless there is a strong station on 
these freqs I stay clear of them. I don't remember this issue when I had the 
radio in the car and operated mobile.
It seems to disappear when I remove the antenna, so I am making the assumption 
that it is coming in thorugh the antenna.
Things I have tried include putting the radio onto a 12 battery supply and 
switching off all power into the house. This inlcuded turning off the mains. 
The interference was still there.
I am in the country, so there is not too much housing around, but I do have a 
neigbour about 25mtrs away. There will be no point going next door and seeing 
if this is where it's coming from (read into that as you can).

I do have another noise which moves between 14.065 and 14.091, (on both radios) 
which I did find out ot be my computer in the radio room. Even with the 
computer off it appears the switch-mode is still alive because when I turned 
the power off at the wall, after about 10secs the noise is gone and the freq is 
now usable, it does not remove the problem I have above. As I mentioned I 
turned everything off at the mains, still there.
I will post this on these two groups as it deals with both the radio and when 
using digital modes.
Is there some way to quieten the power supply so I can use the computer when 
operating my radio/s?

I have a TS-830 on the desk but I must confess I have not tried to see if it is 
on it (just thought about it). Might give that a go on my next rest days, 
actually I just went and checked it now (while I was thinking about it) and the 
61Khz step noise is on the TS-830 too, so it is not the radio. So it is coming 
from some man-made device.

If anyone ahs any ideas I'd be grateful, trying to get back onto the bands 
after about 3 years of inactivity. Must of lost my nerve to call CQ and reply 
to stations, soes not seem as easy now-adays, maybe getting a bit old in the 
tooth, Hi.

Regards and Thanks
Kevin, ZL1KFM.


 
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sparc_nz
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