Date   
TS-590 Family Resources Page: November 2017 Update

Ian_Wade_G3NRW <g3nrw-radio@...>
 

TS-590 Family Resources Page: November 2017 Update


*The TS-590 Family Resources Page …………….. g3nrw.net/TS-590*


*New this month*


Two new items this month:

*


A nice, well documented HOWTO contribution from Lou
Blasco, VK3ALB, describing a booster circuit to fit inside
the TS-590 which makes sure the cooling fans start
reliably when low speed is selected. Click on *HOWTOs
<http://www.g3nrw.net/TS-590/?page_id=256>*

*


A description of a USB Isolator from U.S. Converters. The
isolator is an effective and easy solution to ensure total
isolation between your USB devices and your computer in
benign (that is, non-lightning) conditions. Click on
*OTHER HARDWARE <http://www.g3nrw.net/TS-590/?page_id=1127>*


*Update this month*


Just one update this month: Joe Taylor’s WSJT-X program is now
a Full Release at version 1.8.0 (no longer a Release
Candidate). Click on *OTHER SOFTWARE
<http://www.g3nrw.net/TS-590/?page_id=323> *and scroll down to
almost the end of thepage.


Next, a quick question which I have already asked in the
TS-590 Yahoo groups, but nobody has been able to answer.
Specifically, does anyone know who now owns and manages the
“Kenwood TS-590” Yahoo group (also known as the “Swiss”
group)? The previous owner in New Zealand died several months
ago, and it seems that the group is now rudderless. Please
contact me if you happen to know the answer.


And finally, as ever, I welcome any new links to documents,
slide presentations, YouTube videos, hardware, software etc.
that will be of interest to TS-590SG and TS-590S owners, for
posting on the TS-590 Family Resources Page. Also, let me know
of files you have posted to the “Files” section on the two
reflectors, and I will be happy to add links to them on the
Resources Page.

--
73
Ian, G3NRW
g3nrw@...

***** Editor: TS-590 Family Resources Page: http://g3nrw.net/TS-590

Re: Packet rates HF/VHF/UHF under part-97

M5AKA
 

That CW / Process Gain test for Part-15 products seems like a joke now but it was symptomatic of the excessive regulation that the FCC used to indulge in.

Fortunately the FCC under Ajit Pai is now determined to modernize the rules for all Services. They've got a lot of work ahead of them and regrettably Amateur Radio isn't at the front of the line but I'm sure they'll eventually get round to sorting out Part 97.

To this day many hams are unable to comprehend the difference between the FCC terms “Spread Spectrum” and “SS”.

Even people at ARRL HQ can have difficulty interpreting Part 97. At the end of the last century the League was convinced wideband multiple carrier HF data modes weren’t permitted. It took them some time to realise Part 97 did in fact permit data signals which could in theory occupy an entire band.

Hopefully FCC will soon action the ARRL Symbol Rate petition before they carry out the major task of reforming Part 97.

73 Trevor M5AKA

On Thursday, 2 November 2017, 20:47, Graham <g0nbd@...> wrote:


I spotted your post a  while ago Trevor, but  looking  around since, its difficult to concur , not that it's a  laudable  concept , where  it not  for the  time  and  effort that  has been  expended, in what  Mr T referees to as 'fake news'  concerning the  architecture and design of data modes , to  comply  with the  part-97 , the  wiki  page history   for  olivia is a prime  example , to the  point of demeaning the  ability of the  designer. 

In the  link you provided, there is even a  physical  'cw' test  to judge compliance, taking the  FCC responds to petitions and the  arrl directors,  now,  apparently being  under  'new management' ,with 'the' main issue's  , erased and  re-modelled , rather  in the  style of 'the history of  post revolution Russia' ,   its  difficult to imagine a situation , where an  elegant solution  is to be  reached ?

Who is to raise petition's  about subject's that  are none existent  in the  psyche  of the  users  ?

73-G,

Re: Packet rates HF/VHF/UHF under part-97

Graham
 

I spotted your post a  while ago Trevor, but  looking  around since, its difficult to concur , not that it's a  laudable  concept , where  it not  for the  time  and  effort that  has been  expended, in what  Mr T referees to as 'fake news'  concerning the  architecture and design of data modes , to  comply  with the  part-97 , the  wiki  page history   for  olivia is a prime  example , to the  point of demeaning the  ability of the  designer. 

In the  link you provided, there is even a  physical  'cw' test  to judge compliance, taking the  FCC responds to petitions and the  arrl directors,  now,  apparently being  under  'new management' ,with 'the' main issue's  , erased and  re-modelled , rather  in the  style of 'the history of  post revolution Russia' ,   its  difficult to imagine a situation , where an  elegant solution  is to be  reached ?

Who is to raise petition's  about subject's that  are none existent  in the  psyche  of the  users  ?

73-G,


[TS-590S] TS-590 Family Resources Page: October 2017 Update

Ian_Wade_G3NRW <g3nrw-radio@...>
 

TS-590 Family Resources Page: October 2017 Update

LATEST NEWS


*New this month*


Several people, including myself, have experienced issues
lately with device drivers being silently replaced with
different versions following Windows 10 updates. In particular
this has sometimes stopped serial link drivers (for example,
for FTDI USB adapters or Silicon Labs USB drivers) working
properly. Result: much head-scratching!


The problem is that Windows searches suppliers’ sites for
their latest drivers. Most times this is the sensible thing to
do, but occasionally the latest driver has a bug that prevents
it working properly. In this case you may want to retain an
earlier version that does work, and wait for the supplier to
fix the bug.


So, “all” you need to do is remove any old drivers from the
system, then re-install the version you want. Then tell
Windows not to override your wanted version. I have now added
a HOWTO to the Resources site with step-by-step instructions
explaining how to do this. Click on HOWTOs
<http://g3nrw.net/TS-590/?page_id=256>, and download HOWTO
#30: “HOWTO install Windows 10 Device Drivers”.


Also, last month’s warning about an out-of-date Kenwood driver
page is worth repeating:


*USB Serial Port VCP Drivers — Kenwood page out of date
*


Some people have recently reported difficulties in losing the
current VCP driver after a Windows 10 update. This is not
helped by Kenwood’s _Virtual COM Port Driver_
<http://www.kenwood.com/i/products/info/amateur/vcp_e.html>
page dated 20 May 2016 being out of date. Ignore the link at
the bottom of that page to fetch the Kenwood CP210x Windows
Drivers. Instead, go straight to the _Silicon Labs CP210x USB
to UART Bridge VCP Drivers_
<https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers>
page, which always has the latest drivers.


Also new this month: link to a WSJT-X configuration guide from
LAMCO Ltd. Click on VIDEOS <http://g3nrw.net/TS-590/?page_id=1649>


*Updates this month*


Just one update this month, to the WSJT-X listing. The link
now points to Release Candidate RC3. Click on OTHER SOFTWARE
<http://g3nrw.net/TS-590/?page_id=323>


Finally, as ever, I welcome any new links to documents, slide
presentations, YouTube videos, hardware, software etc. that
will be of interest to TS-590SG and TS-590S owners, for
posting on the TS-590 Family Resources Page. Also, let me know
of files you have posted to the “Files” section on the two
reflectors, and I will be happy to add links to them on the
Resources Page.

--
73
Ian, G3NRW
g3nrw@...

***** Editor: TS-590 Family Resources Page: http://g3nrw.net/TS-590

Re: Packet rates HF/VHF/UHF under part-97

M5AKA
 

Yes existing VHF/UHF rigs lock you into one modulation type for 9600 bps. Maybe in coming years we'll see some fully programmable SDR transceivers for those bands.

Also on the horizon will be the FCC looking at Part 97 Regs. Given that the FCC considered the Regs out-of-date and wanted to completely rewrite them back in 1977 (Docket 20777), but was stopped by amateur protests, it's a safe bet that 40 years later the new FCC administration will also consider them in need of a major overhaul.

This year's modernization of Part 95 Regs (GMRS, FRS, CB) shows which way they are likely to proceed - Deregulation - scrapping of unnecessary rules.

73 Trevor M5AKA


On Wednesday, 18 October 2017, 23:24, Graham <g0nbd@...> wrote:


Hi Trevor ,

It's  Lucky  that's a  clarification of the  regulations ,  one could be  slightly confused  by a  more  in-depth version .

At the  moment , the  packet fact finding , has been confounded , by  available  ''rig design''  its  apparent,  that access  to  9600 baud , eg on 70 cm , entails  the  engagement of a  'fixed'  modulation system, it not  being  possible to change the  modulation , as  in the , more  normal
audio via ssb .   Rx via  sdr  is  simple, but the complimentary Tx is still  proving illusive ..

73-G,


Re: Packet rates HF/VHF/UHF under part-97

Graham
 

Hi Trevor ,

It's  Lucky  that's a  clarification of the  regulations ,  one could be  slightly confused  by a  more  in-depth version .

At the  moment , the  packet fact finding , has been confounded , by  available  ''rig design''  its  apparent,  that access  to  9600 baud , eg on 70 cm , entails  the  engagement of a  'fixed'  modulation system, it not  being  possible to change the  modulation , as  in the , more  normal
audio via ssb .   Rx via  sdr  is  simple, but the complimentary Tx is still  proving illusive ..

73-G,

Re: New VARA OFDM adaptive HF modem

Graham
 

VARA Modem,  new  gateway stations , joined the tests , check the 'Public Gateways' list  from the  application , for the  latest station/frequency 

NB-  Frequency is  listed  in the  Dial Set  USB  format , with  1500 Hz , being  mid  band .

73-Graham 

Last update: 18/10/2017 22:04:42
 
CALLSIGN  DIAL (kHz)   DISTANCE (km)   BEARING (º)   QTH                      INFO                                                        
HB9AK     28311        1084            124           Hoernli (1133m asl)      vertical dipole, 100W peak                                  
S57MK     7047         1488            117           Logatec                  Delta loop antenna 100w                                     
S57MK     3620         1488            117           Logatec                  City Windom antenna 100w                                    
S50ARO    28301        1499            116           Ljubljana                                                                            
S57MK     28310        1525            115           Mrzlica 1122m asl        GP 50w                                                      
IR0UGN    10147.30     1713            130           Scandriglia(RI) - ITALY  http://www.kwos.it                                          
IR0UGN    14102.90     1713            130           Scandriglia(RI) - ITALY  UTC 00:00-07:00 3610kHz / 19:00-00:00 3610kHz               
EA5HVK    10130        1757            174           Cartagena- Spain         Wire dipole  100w peak (25w rms)                            
OH7TE     7045         1954            54            Myllykoski               100 W to OCFD                                               
OH2BRN    3590         2071            50            Rantasalmi Finland                                                                   
KB3PCY    7084.50      5480            285           Kennett Square, PA       Testing Vara HF                                             
KB8HTU    7080         5742            289           West Point, Ohio                                                                     
KB8HTU    7080         5742            289           West Point, Ohio                                                                     
XE2BNC    14100.0      8536            308           Baja CA MX  DM12MM       CREBC Radio Club Beaming 95 degrees  

Re: Packet rates HF/VHF/UHF under part-97

M5AKA
 

Graham, Just run across this useful summary of US Regs regarding Digital Modes




73 Trevor M5AKA




Re: "mchf on steroids"

Siegfried Jackstien
 

https://www.amateurfunk-sulingen.de/forum/index.php?board=18

this is discussion forum for the ovi40 sdr

(if you wanna know2 more look there or drop a line if you wanna become a member ... )

....

the ui board is more or less ready and is in beta test stage

https://www.amateurfunk-sulingen.de/forum/attachments/UHSDR_ui_OVI40_17.pdf

https://www.amateurfunk-sulingen.de/forum/attachments/mchf_ui_i40_info.pdf

(ATTENTION THAT IS NOT THE OFFICIAL LAST VERSION!!! there are some changes made during bate test stage but i do not have the actual version)

20 pre production pcb already sold and the first betatesters are soldering parts now (3 pre alpha pcb were built before)

....

rf board is in development stage (should be available soon cause there is alreqady ONE unit working)

the timeline says available in the next few weeks (sure before xmas)

.....

the connector between ui and rf pcb has same pin out as the mchf so a betatester can use the new ui with the old rf stage

the plan is to have complete kits available (pcb and all parts)... or pre built kits (all smd parts soldered) ... or complete ready to use units (plug and play)

2 different case sizes planned

vhf uhf transverter may be included at a later stage maybe even higher bands?!?)

besides the "normal" bands 10-80 (160) it is planned to add also 4m, 6m, 2m, 630m and 2200m (and direct sampling from dc to 96kc)

medium and langwave will be with 10mw only (you have to build an external power amp especially for that band if you wanna use it)

160-10m (maybe up to 2m) is planned with 50-70w (so enough to drive you tube

.....amp ... grin)

should be a nice winter (xmas) project :-)

greetz

sigi dg9bfc



Am 07.10.2017 um 23:59 schrieb NKemp:

Siegfried  or others ... where might we learn more about this "mchf on steroids"?  Also, being able to do QRP is attractive to me.

Nick
N1KMP

----------------------- Siegfried Jackstien wrote on 10/7/2017 12:08 PM------------------:

patrick ... in the near future there will be an "mchf on steroids" available (developed in our german mchf group) ...

if you want ... build an mchf ... if you can wait a bit ... build the new one :)

bigger and faster mcu and bigger display ... not qrp but 50-7ßw

dg9bfc sigi


Am 07.10.2017 um 16:41 schrieb Patrick Lindecker:

Hello Tony,

 

I don’t understand spoken English but it seems quite clear and comprehensive (except for me ☺). The CODEC is free and has very good performance, the necessary bandwidth being reasonable (less than 3 KHz).

 

FreeDV is a good application and surely the future of the spoken Ham communications.

 

73

Patrick

 

De : main@digitalradio.groups.io [mailto:main@digitalradio.groups.io] De la part de Andrew O'Brien
Envoyé : samedi 7 octobre 2017 13:57
À : main@digitalradio.groups.io
Objet : Re: [digitalradio] SDR QRP Transceiver with built-in FreeDV

 

Very interesting!

Andy K3UK

 

On Fri, Oct 6, 2017 at 9:21 PM, Anthony Bombardiere <DXDX@...> wrote:

All:

Just finished uploading a short Youtube video of a digital voice QSO I had with N4DV using a RS-918 SDR QRP transceiver with built-in FreeDV.

See: https://www.youtube.com/watch?v=MGIjoGcT2Ek

Tony -K2MO





 

--

Andy




Avast logo

L'absence de virus dans ce courrier électronique a été vérifiée par le logiciel antivirus Avast.
www.avast.com





Re: SDR QRP Transceiver with built-in FreeDV

Tony
 

On 10/7/2017 12:41 PM, Patrick Lindecker wrote:

I don’t understand spoken English but it seems quite clear and comprehensive (except for me ☺). The CODEC is free and has very good performance, the necessary bandwidth being reasonable (less than 3 KHz).

Patrick:

I agree -- David Rowe has done a wonderful job given the 1.2 kHz bandwidth. It may sound a bit 'robotic' and decoding can sometimes be susceptible to audio artifacts if the mic levels aren't set correctly, but the performance is good.

Good to hear from you.

Tony -K2MO

Re: SDR QRP Transceiver with built-in FreeDV

Tony
 

Sigi:

Glad you made the suggestion. I've used the FreeDV waveform in the Flex 6300 as well so that makes 2 rigs that have this option. It will be interesting to see if other manufactures follow suit.

Tony -K2MO


On 10/7/2017 1:05 PM, Siegfried Jackstien wrote:

yes it is ...  i brought together the programmers of mchf and programmer of freedv code

i thought ... hmmm in the smart mic is working stm32 and so it is in mchf ... why not include the code of one in the other?!?

ther rest is done from the programmers ... i just had the idea :)

greetz sigi dg9bfc


Am 07.10.2017 um 11:57 schrieb Andrew O'Brien:
Very interesting!
Andy K3UK

On Fri, Oct 6, 2017 at 9:21 PM, Anthony Bombardiere <DXDX@...> wrote:
All:

Just finished uploading a short Youtube video of a digital voice QSO I had with N4DV using a RS-918 SDR QRP transceiver with built-in FreeDV.

See: https://www.youtube.com/watch?v=MGIjoGcT2Ek

Tony -K2MO







--
Andy


"mchf on steroids"

NKemp
 

Siegfried  or others ... where might we learn more about this "mchf on steroids"?  Also, being able to do QRP is attractive to me.

Nick
N1KMP

----------------------- Siegfried Jackstien wrote on 10/7/2017 12:08 PM------------------:

patrick ... in the near future there will be an "mchf on steroids" available (developed in our german mchf group) ...

if you want ... build an mchf ... if you can wait a bit ... build the new one :)

bigger and faster mcu and bigger display ... not qrp but 50-7ßw

dg9bfc sigi


Am 07.10.2017 um 16:41 schrieb Patrick Lindecker:

Hello Tony,

 

I don’t understand spoken English but it seems quite clear and comprehensive (except for me ☺). The CODEC is free and has very good performance, the necessary bandwidth being reasonable (less than 3 KHz).

 

FreeDV is a good application and surely the future of the spoken Ham communications.

 

73

Patrick

 

De : main@digitalradio.groups.io [mailto:main@digitalradio.groups.io] De la part de Andrew O'Brien
Envoyé : samedi 7 octobre 2017 13:57
À : main@digitalradio.groups.io
Objet : Re: [digitalradio] SDR QRP Transceiver with built-in FreeDV

 

Very interesting!

Andy K3UK

 

On Fri, Oct 6, 2017 at 9:21 PM, Anthony Bombardiere <DXDX@...> wrote:

All:

Just finished uploading a short Youtube video of a digital voice QSO I had with N4DV using a RS-918 SDR QRP transceiver with built-in FreeDV.

See: https://www.youtube.com/watch?v=MGIjoGcT2Ek

Tony -K2MO





 

--

Andy




Avast logo

L'absence de virus dans ce courrier électronique a été vérifiée par le logiciel antivirus Avast.
www.avast.com




Re: Packet rates HF/VHF/UHF under part-97

Graham
 

Ok Trevor 

I was  using  baud in the  context of   channel  transfer rate , hence the  2.4k  and ofdm  qualifier 

But, by what ever means ... that's the  information I was looking  for  !

Tnx-G, 

Re: Packet rates HF/VHF/UHF under part-97

M5AKA
 

Graham wrote "So , packet  at say,  1200  bauds in 2.4 KHz  ssb channel  ,  using  ,  ofdm  would be  acceptable   over a  HF link"

No, 1200 baud is not permitted in USA on frequencies below 28 MHz, the maximum allowed is 300 Baud but I think in your question you may be confusing Baud and Bits per second?
1200 bits per second or higher is permitted below 28 MHz as long as the Symbol Rate doesn't exceed 300 Baud.

On 6m and 2m maximum Symbol Rate is 19.6 kilobaud and bandwidth 20 kHz.

On 222 MHz and 70cm maximum Symbol Rate is 56 kilobaud and maximum bandwidth 100 kHz.

I beleive there is only one brief reference to the word "packet" in Part 97, it's mentioned in passing in § 97.303 (l) In the 219–220 MHz segment:
(1) Use is restricted to amateur stations participating as forwarding stations in fixed point-to-point digital message forwarding systems, including intercity packet backbone networks. It is not available for other purposes.

73 Trevor M5AKA


On Saturday, 7 October 2017, 21:16, Graham <g0nbd@...> wrote:


Yes thank's  Rick 

The concern was, is packet defined by  ''name'' with in the  part-97 , similar as  spread spectrum  
is defined by name  alone ?

Its  reasonable to link  the  300  bauds used  by  packet   on HF , with the  300 baud  carrier  rate limit  ?

but   in the  case of  more elegant systems ,  ie   [winlink] ,should  read  winmore,  then 
the  system  data  rate  exceeds the  single carrier  limit 

So , packet  at say,  1200  bauds in 2.4 KHz  ssb channel  ,  using  ,  ofdm  would be  acceptable   over a  HF link 

similarity  , its  reasonable to   assume, that there  is  no  specified  maximum  rate  for  either  carrier or  'packet' 
above  29 MHz ,

Bandwidth alone may be the  limitation , or  are there specific entries in the  part-97 above 29  MHz  ?


Thank's 

Graham
G0NBD






Re: Packet rates HF/VHF/UHF under part-97

Graham
 

Yes thank's  Rick 

The concern was, is packet defined by  ''name'' with in the  part-97 , similar as  spread spectrum  
is defined by name  alone ?

Its  reasonable to link  the  300  bauds used  by  packet   on HF , with the  300 baud  carrier  rate limit  ?

but   in the  case of  more elegant systems ,  ie   [winlink] ,should  read  winmore,  then 
the  system  data  rate  exceeds the  single carrier  limit 

So , packet  at say,  1200  bauds in 2.4 KHz  ssb channel  ,  using  ,  ofdm  would be  acceptable   over a  HF link 

similarity  , its  reasonable to   assume, that there  is  no  specified  maximum  rate  for  either  carrier or  'packet' 
above  29 MHz ,

Bandwidth alone may be the  limitation , or  are there specific entries in the  part-97 above 29  MHz  ?


Thank's 

Graham
G0NBD




Re: Packet rates HF/VHF/UHF under part-97

Rick Muething
 

Graham,

It is important to separate and understand terms:

Modulation type: Common types are: Frequency shift keying FSK, sometimes called nFSK, 4FSK, 8FSK etc) Phase shift keying (PSK, BPSK, 4PSK, 8PSK etc.)   Quadrature amplitude modulation( QAM combination of Phase and amplitude  e.g  32QAM etc )  and a few other less common ones (Chirp etc) . 

A protocol (e.g. Pactor, WINMOR, Robust Packet, ARDOP etc) uses one or more of the above modulation schemes with a complex and detailed set of protocol rules to allow data transmission (FEC or ARQ) and synchronization. Each protocol will have a detailed public document that tells how it works.

The 300 baud limitation (US)  currently applies to all amateur frequencies under 29.0 MHz  It says basically that the max symbol rate (1 symbol per second is 1 baud) on ANY carrier is 300 symbols per second (or 300 baud). [note a symbol may contain 1 or more bits...e.g. one symbol of 8PSK modulation represents 3 bits) ]. Many protocols (Pactor, WINMOR, ARDOP etc) use 2 or more simultaneous carriers and this is usually referred to as OFDM (Orthogonal Frequency Division Multiplex,  which allows multiple simultaneous and closely spaced carriers to not interfere with each other).  In practice symbol rates above 300 aren't too practical on HF because of multipath distortion. Pactor 4 with its mechanism for channel compensation is an exception and has some modes over 300 baud.

There is no "Winlink protocol"  (Winlink is a communication network and currently supports the following HF protocols: Pactor 1-4, WINMOR, ARDOP (using BPQ), Robust Packet (300 baud HF packet).  There has been some experimentation with VARA (a new low baud high number of carriers 2.4 KHz mode).

Different rules apply above 29 MHz and VHF/UHF.

73, 

Rick Muething KN6KB  Winlink Development Team, Developer of WINMOR and ARDOP.




On 10/7/2017 12:28 PM, Graham wrote:
Q what  are the  maximum  packet rates  ?

HF  300 baud packet  , limited by the  max  300  baud  rule  ?  
if  using  other  modulation system,  then over  300 baud is  possible ,  eg winlink  etc ?

Is there  max  baud  rate  for  vhf   , norm   is  1200  for   2  meters  and  9600  for  70  cm  
of just  max  b/w  of  signal ?

Tnx-G,

Re: SDR QRP Transceiver with built-in FreeDV

Siegfried Jackstien
 

patrick ... in the near future there will be an "mchf on steroids" available (developed in our german mchf group) ...

if you want ... build an mchf ... if you can wait a bit ... build the new one :)

bigger and faster mcu and bigger display ... not qrp but 50-7ßw

dg9bfc sigi


Am 07.10.2017 um 16:41 schrieb Patrick Lindecker:

Hello Tony,

 

I don’t understand spoken English but it seems quite clear and comprehensive (except for me ☺). The CODEC is free and has very good performance, the necessary bandwidth being reasonable (less than 3 KHz).

 

FreeDV is a good application and surely the future of the spoken Ham communications.

 

73

Patrick

 

De : main@digitalradio.groups.io [mailto:main@digitalradio.groups.io] De la part de Andrew O'Brien
Envoyé : samedi 7 octobre 2017 13:57
À : main@digitalradio.groups.io
Objet : Re: [digitalradio] SDR QRP Transceiver with built-in FreeDV

 

Very interesting!

Andy K3UK

 

On Fri, Oct 6, 2017 at 9:21 PM, Anthony Bombardiere <DXDX@...> wrote:

All:

Just finished uploading a short Youtube video of a digital voice QSO I had with N4DV using a RS-918 SDR QRP transceiver with built-in FreeDV.

See: https://www.youtube.com/watch?v=MGIjoGcT2Ek

Tony -K2MO





 

--

Andy




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L'absence de virus dans ce courrier électronique a été vérifiée par le logiciel antivirus Avast.
www.avast.com



Re: SDR QRP Transceiver with built-in FreeDV

Siegfried Jackstien
 

yes it is ...  i brought together the programmers of mchf and programmer of freedv code

i thought ... hmmm in the smart mic is working stm32 and so it is in mchf ... why not include the code of one in the other?!?

ther rest is done from the programmers ... i just had the idea :)

greetz sigi dg9bfc


Am 07.10.2017 um 11:57 schrieb Andrew O'Brien:

Very interesting!
Andy K3UK

On Fri, Oct 6, 2017 at 9:21 PM, Anthony Bombardiere <DXDX@...> wrote:
All:

Just finished uploading a short Youtube video of a digital voice QSO I had with N4DV using a RS-918 SDR QRP transceiver with built-in FreeDV.

See: https://www.youtube.com/watch?v=MGIjoGcT2Ek

Tony -K2MO







--
Andy

Re: SDR QRP Transceiver with built-in FreeDV

Patrick Lindecker
 

Hello Tony,

 

I don’t understand spoken English but it seems quite clear and comprehensive (except for me ☺). The CODEC is free and has very good performance, the necessary bandwidth being reasonable (less than 3 KHz).

 

FreeDV is a good application and surely the future of the spoken Ham communications.

 

73

Patrick

 

De : main@digitalradio.groups.io [mailto:main@digitalradio.groups.io] De la part de Andrew O'Brien
Envoyé : samedi 7 octobre 2017 13:57
À : main@digitalradio.groups.io
Objet : Re: [digitalradio] SDR QRP Transceiver with built-in FreeDV

 

Very interesting!

Andy K3UK

 

On Fri, Oct 6, 2017 at 9:21 PM, Anthony Bombardiere <DXDX@...> wrote:

All:

Just finished uploading a short Youtube video of a digital voice QSO I had with N4DV using a RS-918 SDR QRP transceiver with built-in FreeDV.

See: https://www.youtube.com/watch?v=MGIjoGcT2Ek

Tony -K2MO





 

--

Andy




Avast logo

L'absence de virus dans ce courrier électronique a été vérifiée par le logiciel antivirus Avast.
www.avast.com


Packet rates HF/VHF/UHF under part-97

Graham
 

Q what  are the  maximum  packet rates  ?

HF  300 baud packet  , limited by the  max  300  baud  rule  ?  
if  using  other  modulation system,  then over  300 baud is  possible ,  eg winlink  etc ?

Is there  max  baud  rate  for  vhf   , norm   is  1200  for   2  meters  and  9600  for  70  cm  
of just  max  b/w  of  signal ?

Tnx-G,