Re: [Freetel-codec2] Trying to straighten something out...

Hi Kurt, For HF... AOR had (and still has...) a DV "fast modem" using AMBE codec (it also has slick digital image transfer but rarely ever used). AOR's modem(s) have no connection/compatibility with later digital voice derived from hacked Digital Radio Mondiale (DRM) using hacked MELP/LPC

Re: [Freetel-codec2] [Announcement] FreeDV Activity Day - September 16-17, 2023

The SM1000 is available now. I have received the two I ordered and they work FB! Mel, K0PFX From: David Holman Sent: Friday, September 15, 2023 6:33 PM To: freetel-codec2@lists.sourceforge.net Subject: Re: [Freetel-codec2] [Announcement] FreeDV Activity Day - September 16-17, 2023

Re: [Freetel-codec2] Starting an organization for FreeDV/Codec2 development

Mooneer, Very good suggestion. I would like to see an organization as you have described. Mel, K0PFX From: Mooneer Salem Sent: Sunday, February 20, 2022 4:07 PM To: digitalvo...@googlegroups.com; freetel-codec2@lists.sourceforge.net Subject: [Freetel-codec2] Starting an

Re: [Freetel-codec2] free-DV

Hey Al, In the past... I have worked VK and ZL stations on digital voice. I think it could be done again. Just need some sunspots to hang around for a while. Early AM here may provide the propagation for it. I will check for prop and look for it. My antenna (a 2 element Yagi at 72f) but not

Re: [Freetel-codec2] BSD style license for Codec 2

Tomas I believe you are correct. Perhaps, Bruce Parens will be able clear this all up when he has the time to respond to this licensing issue. Mel, K0PFX -Original Message- From: Tomas Härdin Sent: Thursday, March 25, 2021 7:23 AM To: freetel-codec2@lists.sourceforge.net Subject: Re:

Re: [Freetel-codec2] Comments on the M17 project

YO8RZZ On October 26, 2020 1:54:21 PM UTC, Mel Whitten mailto:m...@melwhitten.com> > wrote: Yes, Mumble is popular with QRQ CW ops also. THey run a Mumble server providing low latency QSOs for speeds up to and sometimes exceeding 100wpm. http://qrqcwnet.ning.com/ Mel K0PFX From: Ad

Re: [Freetel-codec2] Comments on the M17 project

Yes, Mumble is popular with QRQ CW ops also. THey run a Mumble server providing low latency QSOs for speeds up to and sometimes exceeding 100wpm. http://qrqcwnet.ning.com/ Mel K0PFX From: Adrian Musceac Sent: Monday, October 26, 2020 6:42 AM To: freetel-codec2@lists.sourceforge.net

Re: [Freetel-codec2] CN12 jumpers setting

Dan, If you have the later SM1000 PCB, "F" I have designed a plug-in configuration PCB board for Yeasu, Icom and Kenwood radios. The Kenwood board "should" work for your rig but I did not have a TS-2k to verify. Let me know and I will send you one. There are others on the list with TS-2k

Re: [Freetel-codec2] QSO.freedv.org

Al, Just use your call sign. Mel From: Al Beard Sent: Monday, August 10, 2020 8:49 PM To: freetel-codec2@lists.sourceforge.net Subject: Re: [Freetel-codec2] QSO.freedv.org Hi John, Can I ask how one gets a login? I see nothing on: http://qso.freedv.org/ I'm

Re: [Freetel-codec2] Center Of Activity in Japan

Take, I believe John, K7VE might consider adding R3 IARU recommended frequencies to his QSO Finder. However, 14.236 HF DV use goes way back before FreeDV (over 20 years ago).and I would not be in favor of changing this long standing DV waterhole. In addition, the “Considerate Operator’s

Re: [Freetel-codec2] Connecting Yaesu MD-100 microphone to the SM1000

Possible ground loop problem. If not already connected -at- CN12, try connecting 2, 9, 10, 11 together. Connect 12 and 12 together. And lastly, try connecting 11 to 12 to get all the grounds together. Mel, K0PFX From: Steven Pemberton Sent: Thursday, June 11, 2020 2:43 AM To:

Re: [Freetel-codec2] SM1000 v3 firmware

David, I have tested it "over the air" between two radios in the shack (ICOM and FLEX) and worked OK. Hope to get on the air if these localized storms (beginning to look like spring around here!) allow. Mel, K0PFX St Louis -Original Message- From: David Rowe Sent: Saturday, March 14,

Re: [Freetel-codec2] A Question about CODEC2 and FDMDV

Yes and Yes, the data is “processed as received” with a little latency. Yes, the software/firmware is open source. Visit https://freedv.org/ Mel K0PFX From: Ammar Ahmad Khan Sent: Tuesday, July 30, 2019 5:53 AM To: freetel-codec2@lists.sourceforge.net Subject: Re: [Freetel-codec2]

Re: [Freetel-codec2] High Quality 2400 bits/s (or so) prototype

"i) A higher quality mode in the 2400 bit/s range. Maybe wideband audio. We could get this into 2000 Hz of RF and SNRs of less than 10dB." This is exactly what the masses are waiting on. Having an HF mode that would provide good voice quality with fallback to 700D robustness at the click of

Re: [Freetel-codec2] FreeDV 1.2.1

Still runs OK on 32bit WIN XP and 64bit WIN 7. Mel, K0PFX -Original Message- From: David Rowe [mailto:da...@rowetel.com] Sent: Monday, May 29, 2017 8:16 PM To: digitalvo...@googlegroups.com; freetel-codec2@lists.sourceforge.net Subject: [Freetel-codec2] FreeDV 1.2.1 Hello Lists, We

Re: [Freetel-codec2] FreeDV always USB or LSB below 10Mhz and USB above?

FreeDV follows the SSB convention as has HF digital voice since day 1. QRM avoidance is aided (not necessarily avoided) when both modes are using the same "sideband." Flex is now aware of this and I am sure will make the change upon the next update of FreeDV. Mel -Original Message-

Re: [Freetel-codec2] OT: LPC-10 License help

LPC-10 was used in early DV programs like Hamdream, WinDRM, DRMDV and FDMDV. It's artifacts at low bit rates were so loud and "screchie" that LPC-10 was never very popular. Mel, K0PFX - Original Message - From: ZPO To: freetel-codec2@lists.sourceforge.net Sent:

Re: [Freetel-codec2] SM1000: Persistent settings now working

Stuart, I believe you have selected a good mic for FreeDV. Gerry N4DV has excellent audio from his vehicle using a "mobile phone" HS mic. A little modification on the connector and that was it. And yes, most importanat and somewhat mic dependent is the windsock. Some speech and breathing

Re: [Freetel-codec2] SM1000 phantom power

Yes, I started using a battery after Walter said he was using it for mobile work. When I demostrate the SM1000 now, I just hang a 9v bat on it for power. AOR's had a ARD9000 had a battery "option." But bats take up a lot of space, so this may not be an option at this late in the design. Mel

Re: [Freetel-codec2] SM1000 patch panel size

Yes, it is too small. And if there is room, use pins/sockets on .100" centers. Mel - Original Message - From: "David Rowe" To: Sent: Wednesday, September 02, 2015 6:49 PM Subject: [Freetel-codec2] SM1000 patch panel size >

[Freetel-codec2] N4DV/4 Mobile to Dayton Hamvention Video

Taken a listen folks... Gerry N4DV using the SM1000 mobile on his way to Dayton Hamvention! Great video... Thanks Tony, K2MO! Mel -- One dashboard for servers and applications across Physical-Virtual-Cloud Widest

[Freetel-codec2] SM1000 SmartMic in action mobile!

Here is a recording made of Gerry, N4DV running mobile near Tampa Florida using his new SM1000 SmartMic. Gerry's rig is an ICOM706MK2 running about 25w average power into a Hustler vertical. Note the good SNR with only a S6 to S7 signal. ...and good audio too! Close talking the mic,

Re: [Freetel-codec2] FreeDV Windows native build

HI Richard, It installs/runs ok on a Win XP machine. Good job! I just made a QSO using it. However, it does not have the Speex Mic Audio Pre-Processor filter which removes low frequency noise in Mics and some noisy sound devices. This is important for many to have since it can avoid

Re: [Freetel-codec2] first qso with freeDV successfull

Congratulations, Alfred.. hope I can work you on 20meters someday. Mel, K0PFX - Original Message - From: wully wu...@bluewin.ch To: freetel-codec2@lists.sourceforge.net Sent: Monday, October 13, 2014 1:54 PM Subject: [Freetel-codec2] first qso with freeDV successfull Hi all I am

Re: [Freetel-codec2] New ARM Cortex-M7

Yes, it was even mentioned in a WSJ (wall street journal) article today. :-) I guess they expect it to make some $$ Mel - Original Message - From: Chris Testa To: freetel-codec2@lists.sourceforge.net ; digitalvo...@googlegroups.com Sent: Thursday, September 25, 2014 10:13

Re: [Freetel-codec2] calc_sd standard deviation

David, Steve is setting the ...sdev to 0 if not in sync.. Would this effect the TX to RX transisition that may create an annoying noise generated when out of sync for a couple seconds before the squelch grabs it? Any relationship here? Mel - Original Message - From: David Rowe

[Freetel-codec2] Fw: calc_sd standard deviation

Ok, Steve.. David and I had discussed earlier about how to eliminate the transition noise so no pops/cracks etc are heard in the speaker. Need a nice quiet transaction. I'll tell you what really is slick.. when a stronger signal (i.e. sync) comes on freq while listening to weaker station. The

Re: [Freetel-codec2] Half Duplex

Yes, STA is the better route. AK0B and I got one for AMTOR and looked what that morphed into. :-) Mel - Original Message - From: Bruce Perens To: freetel-codec2@lists.sourceforge.net Sent: Monday, June 23, 2014 2:33 PM Subject: Re: [Freetel-codec2] Half Duplex On

Re: [Freetel-codec2] FDM Subband Thoughts

The HPSDR has now implemented predistortion and soon I think Walter K5WH, who is very active on FreeDV will have it for his TX. Perhaps, he'll share his experience with predistortion with us in the near future. Mel - Original Message - From: Bruce Perens br...@perens.com To: David

Re: [Freetel-codec2] FDM Subband Thoughts

...and no fading. :-)Well, actually several of us worked DX with the AOR modems. I have a few QSLs for my effort. It was the most frustrating mode I ever used because of the poor sync robustness. Mel - Original Message - From: Ham Radio Java To:

Re: [Freetel-codec2] FreeDV Demo

Richard, I can put some in my drop box but not till after Christmas week. Some files can be several MB in size with screen capture of freedv gui + voice. Yes, we need to get some really good ones for demo. I'll look thru the ones I have for candidates. Mel -Original Message- From:

Re: [Freetel-codec2] Interest in native 64bit windows build?

That would be good! Mel From: Richard Shaw [mailto:hobbes1...@gmail.com] Sent: Friday, October 11, 2013 12:23 PM To: freetel-codec2@lists.sourceforge.net Subject: [Freetel-codec2] Interest in native 64bit windows build? I just happened to be looking around at what mingw packages were

Re: [Freetel-codec2] Actual QSOs using freeDV

Mel, OK. That means that if I say it has been used for worldwide communication on shortwave , that I am telling the thruth. :-) That is all on 20 meters I guess? 14.236 Mhz. 73 kristoff - ON1ARF On 19-09-13 12:45, Mel Whitten wrote: Hi Kristoff, OE3GBB and I have had several QSOs (USA-MO

Re: [Freetel-codec2] Updated windows installer

I am sure you are correct. I keep my squelch at 0.5 and after the install it went to 4.0 which is why I mentioned it. I will delete all registry entries and try it again. Sounds like something unusal happening with my OS registry entries. Thanks Mel - Original Message -

Re: [Freetel-codec2] Updated windows installer

Hi Richard... Just tested Windows installer on Win XP and it installed with no problems. Very smth and quick installation. This is great and will receive a warm welcome by the Windows users. I will ask the beta test team to run the install on Win7/8/8.1 also The only small issue I noted

Re: [Freetel-codec2] Building on Windows

Might be worth the time to review how Digital Radio Mondiale configures their robust modes using OFDM. The DRM spec is here: http://www.etsi.org/deliver/etsi_es/201900_201999/201980/03.01.01_50/es_201980v030101m.pdf Mel - Original Message - From: Bruce Perens br...@perens.com To:

Re: [Freetel-codec2] FreeDV Robustness 3

I have observed ascending multipath change to descending when switching antenna polarity (H to V). The barber pole strips (notches) change direction. K3DCC and I have experimented using 2 independent sync'd receivers with the same and opposite polarity antennas achieving good to mixed

Re: [Freetel-codec2] Trying to decode captured FDMDV + Codec2 signal

Digital voice has been operating on 14.236 since 2007. What I do see is SSB splatter in your waterfall. The 1+ khz guard channel between DRM-based SSTV and FreeDV FDM is pretty effective in avoiding interference between the two modes. Mel k0pfx - Original Message - From: David

Re: [Freetel-codec2] FreeDV Multiple Operators?

..about the same way FM does. Who ever has the strongest signal will capture the frequency. Sync is fast which means it is possible to decode a second, weaker signal if the stronger signal fades momentarily allowing the weaker signal to pop-in for a word or two. Not necessarily a contest

Re: [Freetel-codec2] OFDM for FreeDV?

..maybe it is obviously :-) OFDM has been tried for DV and it works (see WinDRM available at n1su.com) but it has issues for the HF ham radio operator. Try it.. it needs CODEC2! OFDM is being used very successful/y with EasyPal a picture transfer program for HF that has been in use for

Re: [Freetel-codec2] name for the codec2-based DV systems

Possible name for HF DV using FDM modem Dave Witten's GUI is currently using FDMDV2. The 2 would identify FDMDVas the newer release of the original FDMDV plus use of CODEC2. Mel k0pfx - Original Message - From: Kristoff Bonne krist...@skypro.be To: freetel-codec2@lists.sourceforge.net

Re: [Freetel-codec2] yet another digital voice implementation?

Uses same AMBE codec as D-Star. More on DMR from Yeasu here http://arvideonews.com/hrn/index.html episode 7 Mel - Original Message - From: Bruce Perens br...@perens.com To: freetel-codec2@lists.sourceforge.net Sent: Tuesday, April 17, 2012 4:45 PM Subject: [Freetel-codec2] yet