Date   

Re: Contestia 16/250 now available with RSID in fldigi and MULTIPSK

Andrew OBrien
 

Good news, thanks for the info
Andy K3UK


Re: Starting daily 10m PSK activity half-hour

Andrew OBrien
 

I missed a couple of days due to other commitments but did work a few stations around 600 mile range.
Andy


Re: VARA FM settings for Icom ID-5100 #VARA

Andrew OBrien
 

I had the same issue , did not find a solution.
Andy 


Re: VARA on FM 2M

Tammy Waggoner
 

Oliver,

Have you gotten the ID- 5100 to work with VARA FM? I have tried everything but can't get it to work.
--
Tammy KK4USM


VARA FM settings for Icom ID-5100 #VARA

Tammy Waggoner
 

I am having trouble setting up VARA FM with my Icom Id-5100. The 5100 is not listed in the radio drop down box. Is there another option?


Re: Starting daily 10m PSK activity half-hour

stan W9SMR
 

Andy,

Just saw your post. I have been calling CQ for 10 minutes (11/10/20) and have not seen a trace.

Have you had any success with your 10m activity?

73,
Stan
W9SMR


Re: Starting daily 10m PSK activity half-hour

stan W9SMR
 

Andy,

What results are you seeing with this daily 10m Activity Half-hour?

If it is promising, I will post it on the  PODXS 070 groups.io Reflector.

Thanks, 73,
Stan
W9SMR - 070  #1611
PODXS 070 - PR Director


VARA FM settings for Icom ID-5100

Tammy Waggoner
 

I have been trying to configure VARA FM to work with my Icim ID-5100 but the radio isn't listed in the drop down box. Can anyone help?


17M frequencies

Larry Mundinger
 

18100 KHz was once the place for modes like PSK but it was taken over by
FT8.  Since sunspots are coming back should we pick another frequency
and try to get some activity going? Would 18104 KHz work?

Larry  KG4Q


Contestia 16/250 now available with RSID in fldigi and MULTIPSK

Gerry Lawlor
 

Hi Folks
Having spent some time recently using Contestia 16/250 on 40m with others it's apparent that it's a good mode for marginal conditions and at an acceptable speed.  Comparison with other modes has been unfavourable during our tests around 2100Z between Europe and the near US.  Jim AJ8S has been using this mode successfully over a longer period on the path from Ohio to VK6 on 40m.  
Up until  now there was no ready method of setting this mode up other than by using the Config Modem menu in fldigi.  Also, no RSID was available for it.  However that has now changed.   Patrick F6CTE has incorporated Contestia 16/250 into the latest version of MULTIPSK and assigned an RSID to it.  Dave W1HKJ has now incorporated it into the latest version of fldigi -version 4.1.16.01. 
It would be nice to see others using this mode and availing of the superior S/N performance, which at -15 dB is 3 dB superior to e.g. Olivia 4-250 at -12 dB for the same ~20 WPM.   Generally, we play around 7068 kHz CF USB  at approximately 21Z.   Power levels of 200-300W to wire antennas have worked well.   A bandwidth of 300 Hz is very effective on RX. Of course,  there is no reason not to use the other conventional frequencies for digi modes now that an RSID has been assigned. 
Hoping to see some activity in this "new" mode.
73
Gerry EI9FV 


VARA HF v4.0.6 PTT for RA Board interface #VARA

Graham
 
Edited

VARA HF v4.0.6  PTT for RA Board interface

From Vara user group 

Addition added to the VARA modem  , supporting the  RA  interface board
notes, this board is  not  supported by winlink , hence the  direct address
option , 

[on air modem remains  unchanged]

73-Graham
g0nbd

RA board   web link 


VARA HF RA Board.jpg


Re: Build a Long-Distance Data Network Using Ham Radio - IEEE Spectrum

Siegfried Jackstien
 

see also

https://hnap.de/assets/pdf/Presentation%20-%20HNAP4PlutoSDR.pdf


Am 31.10.2020 um 18:25 schrieb Rud K5RUD:

That is interesting. I've wondered why the ISM targeted radios hadn't been used by us. There may even be some 9600 bps packet version that would work on 2m. Don't have the hardware skills to attempt a project so never looked that closely the radios. The NPR might also find us on the 33 cm band. Think I've seen ISMs in that band.


-73 -
Rud Merriam K5RUD
Mystic Lake Software

On 10/30/20 10:55 PM, Andrew O'Brien wrote:
https://spectrum.ieee.org/geek-life/hands-on/build-a-longdistance-data-network-using-ham-radio?fbclid=IwAR23qOqAH2yJ7SR-Fs2FVjy2Q3eGlazRcRyfdiAWmp5yG7RyYr4fqjUje7A


Andy







Re: Build a Long-Distance Data Network Using Ham Radio - IEEE Spectrum

Siegfried Jackstien
 

here in dl they develop a similar thingy around a pluto

high speed access to ham radio network without line of sight (70cm used here but all higher bands are possible up to 6 gig)

a pluto ... an amp ... and a high speed rx tx switching device (relays are too slow) ... (its an rf diode switching ic used from skyworks)

that is user end

base station running fullduplex with filters (pluto amp and filters)

infos here on github

https://github.com/HAMNET-Access-Protocol/HNAP4PlutoSDR

greetz sigi dg9bfc

ps pluto can use any band rx and tx so maybe you can work without filters but two bands

Am 31.10.2020 um 18:25 schrieb Rud K5RUD:

That is interesting. I've wondered why the ISM targeted radios hadn't been used by us. There may even be some 9600 bps packet version that would work on 2m. Don't have the hardware skills to attempt a project so never looked that closely the radios. The NPR might also find us on the 33 cm band. Think I've seen ISMs in that band.


-73 -
Rud Merriam K5RUD
Mystic Lake Software

On 10/30/20 10:55 PM, Andrew O'Brien wrote:
https://spectrum.ieee.org/geek-life/hands-on/build-a-longdistance-data-network-using-ham-radio?fbclid=IwAR23qOqAH2yJ7SR-Fs2FVjy2Q3eGlazRcRyfdiAWmp5yG7RyYr4fqjUje7A


Andy







Re: Build a Long-Distance Data Network Using Ham Radio - IEEE Spectrum

Rud K5RUD
 

That is interesting. I've wondered why the ISM targeted radios hadn't been used by us. There may even be some 9600 bps packet version that would work on 2m. Don't have the hardware skills to attempt a project so never looked that closely the radios. The NPR might also find us on the 33 cm band. Think I've seen ISMs in that band.


-73 -
Rud Merriam K5RUD
Mystic Lake Software


Re: Inexpensive Multi-Band Receiver?

Wa4kfz
 

I think most of the recommendations for a SDR were also based on part of your initial comment:

“Something you might use for an iGate but not fixed frequency.”

By ‘not fixed frequency’ people assumed you were talking about a receiver that could be tuned without manual operator intervention (i.e., having to manually tune the radio if you change modes or frequency). 

Regardless of single conversion, double conversion, etc. what you want in a receiver is good rejection of undesired signals as well as the ability to work well in high dynamic range environments. Once the DSP gets overloaded, DSP “math” falls apart rapidly and signal processing fails. 

73,

Mark WA4KFZ 



On Oct 31, 2020, at 1:30 PM, Graham <g0nbd@...> wrote:


Rud,

SDR- May be not quite ,  its based on a  single  chip ,  with  analog  front end , mixers , then  converts to 
digital to  take care of the  filtering  , decoding etc , very much the  same as any of the  dongle based  sdr systems
unless you  pick up quite a  old  RX, the  analogue front end  >> digital  back  end  will  be the  general layout 

As stand alone Rx , gets good  reports  ,  only possible down side for  data could be the  need to  use the  recovered audio from the  set, as previous, elimination, of as may items in the  signal path, will  reduce distortion , drift and improve  s/n 

73-Graham


<dummyfile.0.part>


Re: Inexpensive Multi-Band Receiver?

Graham
 


Rud,

SDR- May be not quite ,  its based on a  single  chip ,  with  analog  front end , mixers , then  converts to 
digital to  take care of the  filtering  , decoding etc , very much the  same as any of the  dongle based  sdr systems
unless you  pick up quite a  old  RX, the  analogue front end  >> digital  back  end  will  be the  general layout 

As stand alone Rx , gets good  reports  ,  only possible down side for  data could be the  need to  use the  recovered audio from the  set, as previous, elimination, of as may items in the  signal path, will  reduce distortion , drift and improve  s/n 

73-Graham



Build a Long-Distance Data Network Using Ham Radio - IEEE Spectrum

Andrew O'Brien
 


Re: Inexpensive Multi-Band Receiver?

Rud K5RUD
 

Thanks for the suggestion. You're the first one not to suggest an SDR! Appreciate it.


-73 -
Rud Merriam K5RUD
Mystic Lake Software

On 10/30/20 9:33 AM, Thomas Giella wrote:
The Tecsun PL-880 is a very good LW, MW, SW portable receiver for around $150.00 U.S. It has good selectivity, good sensitivity, multiple bandwidth filters and DSP noise reduction. Universal Radio sells it.

73,
Thomas W4HM


Re: Inexpensive Multi-Band Receiver?

Thomas Giella <thomasfgiella@...>
 

The Tecsun PL-880 is a very good LW, MW, SW portable receiver for around $150.00 U.S. It has good selectivity, good sensitivity, multiple bandwidth filters and DSP noise reduction. Universal Radio sells it.

73,
Thomas W4HM


Re: Inexpensive Multi-Band Receiver?

Graham
 
Edited

Rud,

Really depends  on your  intended use , if by digital you  mean the  more normal  HF  beacon  and data  modes ,  any of the  cheap  dongle based set up's  should work  fine , $ no longer equate to  performance , some of the  web-sdr's  are  using  simple $10  dongles as the  rx  heads  , a simple  rtl  dongle will  tune  20 to 1500  MHz , with 2 MHz window 

Though  not my preferred option**, any of the  up converters , gives  full  audio to  Ghz  , for not  very much 

** signal path  is  then   
HF>>VHF>>VHF>>HF>>A/D > pc   , two  mixing  stages and various  amp's, where  as 
direct conversion 
 HF>>A/D  > pc 

The latest batch of low band modes , have stability requirements beyond the  more simple set up's , progress ? may be not, as the effective RX numbers are reduced , but each to his own,  these  require additional  expenditure on  high stability reference oscillators and equipment that  accepts  external  reference inputs 

73-Graham
g0nbd

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