Date   
Re: vara #Software

KC9SGV
 

Excellent digital mode.
As fast as Pactor 3


KC9SGV


On Sep 1, 2019, at 1:16 PM, David Michael Gaytko // WD4KPD <wd4kpd@...> wrote:

hey youall......what happened to the new vara (any version) software ?

was hoping to at least get a look at it.

david/wd4kpd

vara #Software

David Michael Gaytko // WD4KPD
 

hey youall......what happened to the new vara (any version) software ?

was hoping to at least get a look at it.

david/wd4kpd

New release of MULTIPSK (4.40) - DSTAR #Multipsk

Patrick Lindecker
 

New release of MULTIPSK (4.40) - DSTAR

 

Pour les francophones: la version en français de ce message se trouve sur mon site (http://f6cte.free.fr). Il suffit de cliquer sur le lien "Principales modifications (courriel avertissant de la sortie de la nouvelle version)".


Hello to all Ham and SWL,

 

The new release of MultiPSK (4.40) is on my Web site (http://f6cte.free.fr/index_anglais.htm).
The mirror site is Earl's, N8KBR: https://www.paazig.net/f6cte/MULTIPSK_setup.exe

The MD5 signature of the downloaded MULTIPSK_setup.exe file to, possibly, check (with WinMD5 for example), that the downloading works without error, is equal to: 8c9e9cb83148cb228d949e74a263cfe8

Multipsk associated to Clock are freeware programs but with functions submitted to a licence (by user key).

 

The main improvements of MULTIPSK 4.40 are the following:

 

DSTAR decoding/transmission

 

"DSTAR" is the acronym for "Digital Smart Technologies for Amateur Radio". This mode has been developed by the Ham Japanese association (JARL). It is used in VHF and in UHF, mainly for voice communication but also for data communication (included during voice transmissions). It is spread in a world net by using, among other means, repeaters and Internet. It is a mode for amateurs but professionally developed, at equipment level. It is considered as a professional mode for Multipsk (but the decoding is not limited).

 

There are two sub-modes:

·                     the "DV" one (Voice + data) at 4800 bauds for communications between Hams and between Hams and DSTAR repeaters,

·                     the "DD" one (Data only ) at 128000 bauds for communications between DSTAR net pieces of equipment.

 

Only the "DV" sub-mode is here considered and only the data communication. So it is excluded the voice communication decoding which needs an AMBE Codec (under a proprietary licence).

 

For Hams and SWL, the DSTAR signal can be received:

·                     either from the discriminator output of a classical VHF/UHF FM receiver via a direct connection to the PC sound card. However, the receiver must have a large reception bandwidth due to the high modulation speed,

·                     or with a SdR receiver (FunCube Dongle, RTL SDR,...) and directly demodulated by Multipsk. It is the simplest solution.

 

Here is the WEB address where you can know where all DSTAR repeaters are located, with their frequencies, for each country (so as to monitor one or more): http://www.dstarusers.org/repeaters.php

 

In transmission, the following functions are compatible with the ICOM transceivers:

·                     transmission of 20 characters maximum messages,

·                     beacon,

·                     "parrot" (repeats valid DSTAR frames, without any processing).

 

A small interface is proposed. See the paper:

"HOW_TO_DO_DIRECT_DSTAR_BETWEEN_HAMs_Rev_A.pdf" paper located in the http://f6cte.free.fr/DSTAR.ZIP file.

 

This mode is in freeware, so without time limitation.

 

See general specifications further on.

 

Other modifications

 

·                     For the users having a Multipsk licence, by clicking on the "Mode" button, it will be found the new option "Modes selection" which goal is to select the sole modes really used by the user. The panels of modes (amateur and professional) will, hence, propose a choice among the sole selected modes.
Note that at each new Multipsk version, the selection panel will display again with all the modes.

 

Note about translation of Multipsk.exe and Clock .exe:  the 4.39.4 version of Multipsk has been translated to Spanish by Joachin (EA4ZB), from French.

See: http://f6cte.free.fr/Translation_files.htm.

 

73

Patrick

 

Description of the DSTAR mode

There are two sub-modes:

·                     the "DV" one (Voice + data) at 4800 bauds for communications between Hams and between Hams and DSTAR repeaters,

·                     the "DD" one (Data only ) at 128000 bauds for communications between DSTAR net pieces of equipement.

Only the "DV" sub-mode is here considered and only the data communication. So it is excluded the voice communication decoding which needs an AMBE Codec (under a proprietary licence).

 

Description :

Baud rate: 4800

Modulation : the NRZ logic signal (1/-1) directly modulates, through a GMSK filter (to reduce the bandwidth needed), the VHF or UHF frequency in FM (on about +/- 3 KHz). So this signal is received in base band after FM demodulation.

Reception mode: FM

Character set : on 8 bits (but only ASCII is used)

Shape of pulse : GMSK (BT product=0.5)

Bandwidth : about 6 KHz

Synchronization : automatic using the signal

Detection code: yes on 15 bits.

Convolution code: FEC R=1/2, k=3 on the header

Interleaving : yes on the header

Scrambling: yes

Each DV DSTAR frame contains:

·                     a 64 bits minimum training sequence for synchronization,

·                     a sequence of 15 bits for the frame detection,

·                     a header of 660 bits containing different control pieces of information and 4 call signs.

·                     a certain number of pair of 96 bits, each pair containing either a "Voice slot" (72 bits) + a "data slot" (24 bits) or a "Voice slot" + a synchronization flag,

·                     an end frame flag.

For more details, see at the Internet address: https://www.jarl.com/d-star/shogen.pdf

 

Multipsk transmission of messages compatible with the ICOM 20 characters messages

In addition, the DSTAR transceivers (mainly ICOM) can transmit and receive a 20 characters message. It appears that these messages are transmitted in "clear text" after a scrambling of each data slot (24 bits). The packeting is simple but remains proprietary (so it is not described).

Multipsk permits the transmission of such small messages according to a protocol described in the document "Multipsk specifications relative to the DSTAR DV mode rev. A.pdf" located in the http://f6cte.free.fr/DSTAR.ZIP

file.

 

 




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Re: VARA -SAT- Dynamic net facility #VARA

Graham
 

dg0opk   Lists  equipment  used  

[SDR console ,  has  beacon  AFC-Lock , specially designed  for the  Sat
used the  band edge  CW beacon to  lock  qrg]

Peak Data Rate: 3500bps

 

setup using:

TCXO LNB with software drift correction on QO-100 BEACON (SDR Console), ADALM PLUTO (TCXO MOD) in FULLDUPLEXMODE, SDR Console V3.0.11 ,Virtual Audio to Vara Modem, RX/TX Switch ... VOX Controlled by SDR Console

 

VARA -SAT- Dynamic net facility #VARA

Graham
 
Edited

VARA  -SAT-  Dynamic net facility 

This puts  portable operation  , from  low power non gps locked systems on the  table 

Latest version , contains an interrogator , which,  produces a response  from the  wanted  station , 
indicating the  level of  frequency   'off net'  [ similar to  IFF  or Secondary radar ] 

This allows  a connecting  station to  'find'  the  wanted  gateway , and to  then  commence  transmission
[ solving the  age old problem with  duplex sat work of  netting ]

The  vara-sat version , now has  undergone  considerable  testing  and  modification over the  geo-sat link, and now  provides extended  latency  , with  enhanced  AFC 

PA1SDB , Conducted  low power test  and reports  data  transfer with   70 mW to  120 cm dish  ,  the  Modem  reached  level  3  , the  maximum  un-registered speed  173 baud  , problems  experienced , where  trying to  reduce the  power, to a  lower level ! , 

Follow the  progress  , being  reported  on the  Amsat-DL  web-site 

https://forum.amsat-dl.org/index.php?thread/2829-is0grb-winlink-server-on-qo-100-dial-10489635-0-usb/&pageNo=3


Roberto IS0GRB Testing the  system with  his  RMS gateway , posts  :-


This evening Jose EA5HVK has released the version 3.0.5 of the VARA SAT modem.

 

https://rosmodem.wordpress.com/2011/01/10/ros-2

 

This version, at our request, integrates the Calibration function, very useful via satellite and for those without GPS.


In the Calibration menu the client transmits a signal to the server, normally controlled by GPS, or to another client controlled or not by GPS, which reply with its signal and the shift detected by the client who launched the test.

 

It is therefore possible to know your own AFC value detected by the correspondent and center the VFO, so as to reset the AFC to 0 (zero) without the aid of a WebSDR and therefore of internet connection.

73

Roberto IS0GRB











ARRL/TAPR DCC - Call for Technical Presentations & Papers #digital

Mark Thompson
 


2019 ARRL/TAPR DCC 
(Digital Communications Conference) 

Detroit, MI (near airport) 
September 20 - 22

Call for Technical Presentations & Papers


Technical Presentations & Papers are solicited for presentation at the ARRL and TAPR Digital Communications Conference and publication in the Conference Proceedings. 

Annual conference proceedings are published by the ARRL.
Presentation at the conference is not required for publication. 


A Technical Paper is not required to make a Technical Presentation at DCC. 

If interested in making a Technical Presentation please contact TAPR President, Steve Bible, N7HPR at steven.bible@... 


Submission of technical papers are due by August 12, 2019 and should be submitted to:
Maty Weinberg, ARRL
225 Main Street
Newington, CT 06111

or via the Internet to maty@...

Full Details on Call for Papers & Submission Guidelines at:
https://www.tapr.org/dcc#dcccallforpapers



Re: where can I find remote controlled relay board ? #digital

Joe
 

I purchased a Denkovi SNMP12 a few years ago that will probably do what you want.?? It has 12 SPDT relays (up to 15A), 8 ADC inputs (0-10V) and 8 digital inputs (0-12V).

<https://denkovi.com/ethernet-io-relay-module-snmp-web-12-relays>

Unfortunately, they are now "Out of stock".?? You might find something else on their website that will do the same thing.

I never used it for my ham radio remote base project.?? I don't remember why, but I used a different device to do what I wanted to do.?? The SNMP-12 did work fine, but all I was interested in at the time was a way to control AC outlets.?? I ended up using a Synaccess NetBooter NP-08 for the application.

My board is about 4-5 years old and was never put into use.?? If it is something you are interested in I'd sell it.

Joe, K1ike

Re: New VARA HF v3.0.2 #VARA

Graham
 

Andy

Yes its bit clunky , but , the  intent  was/is to  provide  , fast  one-2-one comms ,  with  file transfer , 
good  reports are being  received  from the  E-Com  users ,  a new version  overcomes a  unexpected limitation  to  file  transfer  max size , that might of been  with the  high speed  VHF modems ,  

Due to the  rather poor  conditions,  testing over the  1000  mile HF  UK<>EA path was a  little  sprodic, only reached level 3 or 4  , however its up  and running , the  monitor function  in VAR should  enable  some sort of  round table aspect , 

73-G

PR8KW Brazil <> Italy IS0GRB VARA E-malil over QO-100 #VARA #sat

Graham
 
Edited


IS0GRB Winlink Server on QO-100 (Dial 10489635.0 USB)


Successful test of  E-mail and File transfer,
have been  completed  by  PR8KW  ,
using the  WIN-Link  ground station  provided  by  IS0GRB

Test's  and  development  continue , at the  time of posting , 
VARA -SAT is at issue  3-0-4 

Last report being  :- 

Test with Vara Sat 3.0.4.

send 16484bytes in 03:30.

4686 bytes/minute.

Any so  equipped stations are invited to join in the  trials 
SWL's may monitor , by  web or off air,
using the  VARA monitor  function 



Progress is being  updated  to the  amsat forum 
https://forum.amsat-dl.org/index.php?user-post-list/373-pr8kw/



73-Graham
g0nbd

Re: where can I find remote controlled relay board ? #digital

Bo, OZ2M
 

Hi Fred

Perhaps units from RemoveQTH is what you are looking for: https://remoteqth.com/hf-switching-and-matching.php

73
Bo, OZ2M, www.rfzero.net

where can I find remote controlled relay board ? #digital

ve3pie@...
 

does anyone recall the company selling a board with on-off relays (about 10 I think)
that also had a readout for voltage.
it could be remotely controlled via internet, and also you could define macros where you could control multiple relays at once, with one click.
I can't remember the company that sold this, or if there is something like on the market.
any suggestion are appreciated.
thanks, Fred VE3PIE / VE3WN

Re: New VARA HF v3.0.2 #VARA

Andrew O'Brien
 

Thanks Graham, I have downloaded and it installed without issues.  Seems my registration from previous versions has been accepted.   I'm not actually sure how to use since almost all my previous use was with RMS Express.  I am not sure if there is again a stand alone use, will poke around some more.

Andy K3UK

On Mon, Jul 22, 2019 at 4:12 PM Graham <g0nbd@...> wrote:
Andy, 

I think  you  may find , the  new  'Chat' application , quite novel, in that  it gives access to the  modem at  all  speeds ,  but , I for  one  cannot  type that  fast ! , running the  'chat  app , calls the  vara  modem ,
Chat provides the  Rig  control  , via CAT or  Com-ptt  and the  modem  , the  audio interface  and  tune  button  ,  now a single  1500 Hz test  tone .The new modem has improved low  signal performance ,  this with the  arq  function , makes  for  low  power  error free  qso's , at power levels  much reduced  from the  days of amtor

Though not intended ,  the  unlicensed [free for all]  modem runs to  175  baud  level 3  , min being 40 baud  , ample  for  qso ,  but notably ,  for the  qrp  users , the  modem  remains  MFSK as  is the  ACK frame , being  phase continuous , allows it to be  passed  via non linear systems , ie , class  E/D  power  stages , which will  be of interest to the  low power / battery  emergency  situations ,  

Entering a valid key , enables the  faster  levels, which are ofdm and require  linear handling.

Might be of wider  interest to list  possible watering  holes  for  'vara chat' ? first over the  pond  might be a start !

73-Graham
g0nbd



--
Andy

Re: New VARA HF v3.0.2 #VARA

Graham
 

Andy, 

I think  you  may find , the  new  'Chat' application , quite novel, in that  it gives access to the  modem at  all  speeds ,  but , I for  one  cannot  type that  fast ! , running the  'chat  app , calls the  vara  modem ,
Chat provides the  Rig  control  , via CAT or  Com-ptt  and the  modem  , the  audio interface  and  tune  button  ,  now a single  1500 Hz test  tone .The new modem has improved low  signal performance ,  this with the  arq  function , makes  for  low  power  error free  qso's , at power levels  much reduced  from the  days of amtor

Though not intended ,  the  unlicensed [free for all]  modem runs to  175  baud  level 3  , min being 40 baud  , ample  for  qso ,  but notably ,  for the  qrp  users , the  modem  remains  MFSK as  is the  ACK frame , being  phase continuous , allows it to be  passed  via non linear systems , ie , class  E/D  power  stages , which will  be of interest to the  low power / battery  emergency  situations ,  

Entering a valid key , enables the  faster  levels, which are ofdm and require  linear handling.

Might be of wider  interest to list  possible watering  holes  for  'vara chat' ? first over the  pond  might be a start !

73-Graham
g0nbd

Re: New VARA HF v3.0.2 #VARA

Andrew O'Brien
 

Interesting , thanks 
Andy


On Jul 21, 2019, at 9:32 AM, Graham <g0nbd@...> wrote:

[Edited Message Follows]

Posted to the  VARA group  this morning ,  announcement , new  VARA  V3-0-2  has been  released , 

in addition , two  other  applications  are  released :-

VARA  Terminal : , allowing  connection  to  BPQ servers ,  deploying VARA modem  

CHAT  application , which allows the  modem to  be uses as  'QSO mode ,  
with  full  arq,  [ similar to  AMTOR ] for  live  keyboard text  and  file  transfer 
[NB unlicensed modem runs to  175 Baud]

Download links , as of  today  21/7

  VARA HF v3.0.2 (From July 27th onwards. No compatible with v2.2.1)

  VARA HF v2.2.1 (Old version, expires July 27th)

  VARA SAT v3.0.1 (For Es’Hail-2 (QO-100) Satellite)

  VARA FM v1.2.8 (For 2m,70cm FM Links)

  VARA Chat v1.0.7 (Text and File transfer P2P app)

  VARA Terminal v1.0.5 (VARA dumb terminal)


Copy follows 

________________________________________________________________________________

Good morning,
 
As some of you know, i have been working in a new VARA HF since months ago. The objective was improve all the lines of the code and, specially, increase the sensitivity with low S/N, getting good performance with bad and good conditions.
 
The result is the new VARA HF v3.0.2 and can be downloaded in the official VARA site without extra cost for VARA licenses:  https://rosmodem.wordpress.com/
 
Sysops have been notified by the WDT and will try replace VARA v2.2.1 by the v3.0.2 on July 27th (or even before) . 
 
The default retries in this new VARA is 10 (instead of 5) as now the connection protocol is faster. Set the number of retries that best fits with your usual Gateways. The time between retries is 3.2 seconds, so 10 retries are 32 seconds cycle. And DWELL time (for Gateway sysops) is 4 seconds.
 
special thanks to Martin HB9AUR for the countless hour spent testing VARA prototypes 
 
73
Jose
EA5HVK

New VARA HF v3.0.2 #VARA

Graham
 
Edited

Posted to the  VARA group  this morning ,  announcement , new  VARA  V3-0-2  has been  released , 

in addition , two  other  applications  are  released :-

VARA  Terminal : , allowing  connection  to  BPQ servers ,  deploying VARA modem  

CHAT  application , which allows the  modem to  be uses as  'QSO mode ,  
with  full  arq,  [ similar to  AMTOR ] for  live  keyboard text  and  file  transfer 
[NB unlicensed modem runs to  175 Baud]

Download links , as of  today  21/7

  VARA HF v3.0.2 (From July 27th onwards. No compatible with v2.2.1)

  VARA HF v2.2.1 (Old version, expires July 27th)

  VARA SAT v3.0.1 (For Es’Hail-2 (QO-100) Satellite)

  VARA FM v1.2.8 (For 2m,70cm FM Links)

  VARA Chat v1.0.7 (Text and File transfer P2P app)

  VARA Terminal v1.0.5 (VARA dumb terminal)


Copy follows 

________________________________________________________________________________

Good morning,
 
As some of you know, i have been working in a new VARA HF since months ago. The objective was improve all the lines of the code and, specially, increase the sensitivity with low S/N, getting good performance with bad and good conditions.
 
The result is the new VARA HF v3.0.2 and can be downloaded in the official VARA site without extra cost for VARA licenses:  https://rosmodem.wordpress.com/
 
Sysops have been notified by the WDT and will try replace VARA v2.2.1 by the v3.0.2 on July 27th (or even before) . 
 
The default retries in this new VARA is 10 (instead of 5) as now the connection protocol is faster. Set the number of retries that best fits with your usual Gateways. The time between retries is 3.2 seconds, so 10 retries are 32 seconds cycle. And DWELL time (for Gateway sysops) is 4 seconds.
 
special thanks to Martin HB9AUR for the countless hour spent testing VARA prototypes 
 
73
Jose
EA5HVK

Re: Astron Power Supplies For Sale #Power Supplies For Sale #power

Tony
 

Andy:

I'm downsizing the shack so there's no need for the extra hardware. I have a 35A supply as well as a smaller one so there's more than enough juice to power the rigs.

Hope all is well.

Tony -K2MO

On 6/26/2019 11:25 PM, Andrew O'Brien wrote:
Tired of Astron ?
On Jun 26, 2019, at 10:06 PM, Tony <DXDX@...> wrote:


All:

I have 3 like-new Astron power supplies for sale: SS-18 / SS-25 and SS-30M. All were purchased new for $400.0 in 2019.

Best offer takes all three. Pictures on request.

Paypal / CONUS only.

Tony -K2MO





Re: Astron Power Supplies For Sale #Power Supplies For Sale #power

Andrew O'Brien
 

Tired of Astron ?

On Jun 26, 2019, at 10:06 PM, Tony <DXDX@...> wrote:


All:

I have 3 like-new Astron power supplies for sale: SS-18 / SS-25 and SS-30M. All were purchased new for $400.0 in 2019.

Best offer takes all three. Pictures on request.

Paypal / CONUS only.

Tony -K2MO





Astron Power Supplies For Sale #Power Supplies For Sale #power

Tony
 

All:

I have 3 like-new Astron power supplies for sale: SS-18 / SS-25 and SS-30M. All were purchased new for $400.0 in 2019.

Best offer takes all three. Pictures on request.

Paypal / CONUS only.

Tony -K2MO

k3ukpage #facebook

main@digitalradio.groups.io Integration <main@...>
 

By digitalradio

FT* mode activity on 20M tonight

New release of MULTIPSK (4.39.1) - New package due to missing files #Multipsk

Patrick Lindecker
 

Hello to all,

 

As I realized that it was missing files (about SDRplay), I have just updated the Multipsk V.4.39.1 package. Sorry.

 

73

Patrick




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