[digitalradio] WU3V Offering Repair Services for Older Kantronics TNCs
- Forwarded Message Repair for the [older] Kantronics TNC products I have a repair center for the Kantronics TNC products, We are supporting the KPC-2 KPC-3 KPC-2400 and the Dataengine units. Our rates are very reasonable and offer less than 5 day turnaround (parts availability). Jim WU3V 406.231.4483
[digitalradio] RTTY decoding
Hi folks, I'm a student and interested in RTTY decoding principles. What methods/algorithms were used, what procedures has the best results ? Is it possible to implement a decoder with a microcontroller or does it have not enough resources ? 73 Sven
[digitalradio] Re:Netbook or Laptop better?
I have/do use both. A full sized Dell Vostro, or an Acer Aspire One, both on Win XP. I have gravitated to using the Acer for my FT-817. However, reaching the trifocal stage of my life, for home use, I have attached a separate monitor to it for better visibility. However, for field use, the Acer is much nicer to cart along. At home, I use the Dell for monitoring wsprnet, and QRZ.com for lookups, etc. For traveling, I tend to take the Acer, just because of its size. BTW, the Acer only cost me $300, so if it didn't work out, I wasn't out a lot. The acer is somewhat slower than the Dell, but running HRD/DM780, wsprnet, JT65-HF, etc., ONE AT A TIME presents no problem. /paul W3FIS
Re: [digitalradio] RTTY decoding
Download MixW 2.19. It is easy to install, free and you do not need much of a processor. It uses your soundcard as the modem and an HF radio to gather the signals. Your computer processor is the microcontroller, so to speak. There are numerous sources for the engineering behind RTTY digital signal processing. Interesting stuff and it is a good place to start for young electrical engineers. IEEE usually covers this topic very well and their subscription rates for students are very low. What kind of HF radio do you have? Rick - KH2DF Sent from my iPhone On Feb 16, 2010, at 4:27 AM, sven98de sven9...@yahoo.de wrote: Hi folks, I'm a student and interested in RTTY decoding principles. What methods/algorithms were used, what procedures has the best results ? Is it possible to implement a decoder with a microcontroller or does it have not enough resources ? 73 Sven
[digitalradio] Re: Netbook or Laptop better?
As others have mentioned, the hardware is not usually much of an issue. You might find it advantageous to run something other than Win98. Avoid Vista, too. 73 de Dave, NF2G
Re: [digitalradio] RTTY decoding
Rick, When did MixW become free? We, for years, have been able to download it for a trial period of no more than a couple of weeks, then it stopped working, until paid for. Its been a few years, but I think it was around $60.00 about 3-4 years ago, still a good bargin, since it works so well, and has many different modes. Its logbook though, cannot even start to compare with DXKeeper, nor its spotting section with SpotCollector. It does have an interface that works well with DXLabs, and I used that for a couple of days (checking out some digital modes) about a year ago. Danny Douglas N7DC ex WN5QMX ET2US WA5UKR ET3USA SV0WPP VS6DD N7DC/YV5 G5CTB All 2 years or more (except Novice). Short stints at: DA/PA/SU/HZ/7X/DU CR9/7Y/KH7/5A/GW/GM/F Pls QSL direct, buro, or LOTW preferred, I Do not use, but as a courtesy do upload to eQSL for those who do. Moderator DXandTALK http://groups.yahoo.com/group/DXandTalk Digital_modes http://groups.yahoo.com/group/digital_modes/?yguid=341090159 - Original Message - From: Rick Westerfield To: digitalradio@yahoogroups.com Sent: Tuesday, February 16, 2010 7:53 AM Subject: Re: [digitalradio] RTTY decoding Download MixW 2.19. It is easy to install, free and you do not need much of a processor. It uses your soundcard as the modem and an HF radio to gather the signals. Your computer processor is the microcontroller, so to speak. There are numerous sources for the engineering behind RTTY digital signal processing. Interesting stuff and it is a good place to start for young electrical engineers. IEEE usually covers this topic very well and their subscription rates for students are very low. What kind of HF radio do you have? Rick - KH2DF Sent from my iPhone On Feb 16, 2010, at 4:27 AM, sven98de sven9...@yahoo.de wrote: Hi folks, I'm a student and interested in RTTY decoding principles. What methods/algorithms were used, what procedures has the best results ? Is it possible to implement a decoder with a microcontroller or does it have not enough resources ? 73 Sven
Re: [digitalradio] RTTY decoding
On Tue, 16 Feb 2010 04:53:04 -0800 (PST), Rick Westerfield r_lwesterfi...@bellsouth.net said: Download MixW 2.19. It is easy to install, free and you do not need much of a processor. It uses your soundcard as the modem and an HF radio to gather the signals. Your computer processor is the microcontroller, so to speak. Yeah, because MixW will really help him understand RTTY decoding after he spends a couple of terms disassembling the binaries and reverse engineering the decoder. There are numerous sources for the engineering behind RTTY digital signal processing. Interesting stuff and it is a good place to start for young electrical engineers. IEEE usually covers this topic very well and their subscription rates for students are very low. IEEE publications cover many topics really well, but someone who wants to get a grasp on DSP will have better luck reading books (some of them freely avaialble online) or university course material. There are also at least two existing, actively developed, FOSS implementations of RTTY (pocketdigi and fldigi) that anyone can study, modify, improve and share. I don't speak for the authors of the RTTY modems in these programs but I imagine that they would be happy to help someone who has already spent some time trying to understand their design. -- 73, Stelios, M0GLD.
