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Dragon SCS modem ?
#Pactor
Andrew O'Brien
Anyone have a Dragon SCS modem for sale ? It is really the only digital mode I have not tried and , despite knowing there is little activity other that Winlink stuff, I am interested in experimenting with it.
Andy K3UK
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Take over this group?
Andrew O'Brien
As you can probably tell, I have essentially lost interest in this group mail list. If anyone wants to take over as "owner", let me know
Andy K3UK
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xGxRxIxDxX Exercise Info - 11/15/17
WD8ARZ
Shares net very busy at this time, with more activity planned this evening. This might be standard, but some importance seemed to being imparted to not miss it. Much of net controls info was also in emails he said.
They were very active on 7554.50 USB Voice Shares Net, ran by 359 in TN chatting about a QridX Exercise this evening - Many relays of info using MT63 Digital with meeting schedule this evening about 6pm with headquarters out of Atlanta. Called it MSG 812 Lot of check-ins were out of EOC's from various states. If you do a Google on QridX Exercise you will get a lot of Very Interesting Links .... Hmmmm - 73
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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
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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.
toggle quoted messageShow quoted text
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,
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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,
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[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
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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,
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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,
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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
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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
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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.
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Re: SDR QRP Transceiver with built-in FreeDV
Tony
On 10/7/2017 12:41 PM, Patrick
Lindecker wrote:
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
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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:
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"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.
toggle quoted messageShow quoted text
Nick N1KMP ----------------------- Siegfried Jackstien wrote on 10/7/2017 12:08 PM------------------:
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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,
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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
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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
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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 ?
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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:
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