- 61. Re: [RTTY] Some basic RTTY radio questions (score: 1)
- Author: "G3YYD" <g3yyd@btinternet.com>
- Date: Mon, 07 Mar 2016 15:23:20 -0500
- I see Chen got into this one before me. Chen and I both design and make available RTTY decoders. The internal workings of those decoders for best performance requires that the AGC does not change the
- /archives//html/RTTY/2016-03/msg00023.html (9,562 bytes)
- 62. Re: [RTTY] K3 RTTY Decode (score: 1)
- Author: "G3YYD" <g3yyd@btinternet.com>
- Date: Fri, 18 Mar 2016 05:11:36 -0500
- Chen W7AY is correct. I use Pathsim to generate standard test files for the various CCIR now ITU standard propagation tests. This then gives me a bench mark for the current version of 2Tone against w
- /archives//html/RTTY/2016-03/msg00061.html (8,088 bytes)
- 63. Re: [RTTY] Commercial software (score: 1)
- Author: "G3YYD" <g3yyd@btinternet.com>
- Date: Mon, 21 Mar 2016 16:03:35 -0500
- Interesting discussion. The reason I developed 2Tone initially was to give me a competitive edge over other contesters. This it did. This is why it works with N1MM now N1MM+ as that was the contest l
- /archives//html/RTTY/2016-03/msg00145.html (9,623 bytes)
- 64. Re: [RTTY] Dayton Hamvention RTTY Contest Forum (score: 1)
- Author: "G3YYD" <g3yyd@btinternet.com>
- Date: Thu, 24 Mar 2016 17:13:03 -0500
- When contesting I use foam ear plugs then headphones. This means I can have a much lower audio level in the ears. It also reduces the external noise from the cooling fans on the amplifiers relative t
- /archives//html/RTTY/2016-03/msg00204.html (10,923 bytes)
- 65. Re: [RTTY] A Question for Chen... Soundcards? (score: 1)
- Author: "G3YYD" <g3yyd@btinternet.com>
- Date: Thu, 24 Mar 2016 18:07:53 -0500
- I tested the cheapest USB sound card I could find. It had high levels of aliasing distortion that created false RTTY signals off set from the real one at about -30 to -40dB down. At some tone frequen
- /archives//html/RTTY/2016-03/msg00214.html (9,683 bytes)
- 66. Re: [RTTY] Waterfall and CQ conundrum (score: 1)
- Author: "G3YYD" <g3yyd@btinternet.com>
- Date: Sun, 27 Mar 2016 14:43:34 -0500
- CRLF is not required just send CR or LF. The software will turn that into a new line. However I dont care if a skimmer makes a false spot when I am running. It may even be beneficial if the guy who c
- /archives//html/RTTY/2016-03/msg00279.html (14,023 bytes)
- 67. Re: [RTTY] How I worked VK0EK from NA on 15M RTTY this morning (score: 1)
- Author: "G3YYD" <g3yyd@btinternet.com>
- Date: Tue, 05 Apr 2016 14:25:54 -0500
- I managed to work them on RTTY 15m at 1154utc yesterday(4th April) 21094.10 QSX 21096.97 73 David G3YYD That's very odd .. or maybe a typo? They have been running on 21097, not 21079, and working spl
- /archives//html/RTTY/2016-04/msg00018.html (11,177 bytes)
- 68. [RTTY] VK0EK RTTY Update (score: 1)
- Author: "G3YYD" <g3yyd@btinternet.com>
- Date: Sun, 10 Apr 2016 15:14:43 -0500
- TX7EU at the start of their RTTY did exactly that. They called you on your frequency. This meant there was no static frequency that could be DQRM. It made the pile up spread out by having to listen t
- /archives//html/RTTY/2016-04/msg00105.html (8,452 bytes)
- 69. Re: [RTTY] RTTY DX'ing tutorial (score: 1)
- Author: "G3YYD" <g3yyd@btinternet.com>
- Date: Sun, 10 Apr 2016 15:19:57 -0500
- My normal practice for calling DX is to send my callsign twice after the TU/UP then pause and start sending the call once pause and so on until I hear him work someone hopefully me if not then wait f
- /archives//html/RTTY/2016-04/msg00106.html (15,039 bytes)
- 70. Re: [RTTY] USB serial port adapters (score: 1)
- Author: "G3YYD" <g3yyd@btinternet.com>
- Date: Sun, 24 Apr 2016 12:45:41 -0500
- Lee The EXTFSK system is basically bit toggling the TXD line by using timing in software. This means there is considerable timing jitter so that individual bit times can be too long or too short. Thi
- /archives//html/RTTY/2016-04/msg00187.html (10,077 bytes)
- 71. Re: [RTTY] 2016 Digital Mode Most Wanted Survey - Session Timeouts (score: 1)
- Author: "G3YYD" <g3yyd@btinternet.com>
- Date: Mon, 02 May 2016 06:16:09 -0500
- Clublog (www.clublog.org) enables you to up load your log in adif format (no encoding needed unlike LoTW)). It can be zipped to save upload time. Then use the clublog processes to find all sorts of i
- /archives//html/RTTY/2016-05/msg00008.html (12,070 bytes)
- 72. Re: [RTTY] RM-11708 (score: 1)
- Author: "G3YYD" <g3yyd@btinternet.com>
- Date: Fri, 29 Jul 2016 12:05:45 -0500
- Bandwidth limits have been used for many years in the IARU Region 1 plan. They are voluntary and are complied with by the vast majority of operators (I would say >99%). So the "RTTY" segments are 500
- /archives//html/RTTY/2016-07/msg00103.html (15,636 bytes)
- 73. Re: [RTTY] Guess I have been away longer than I thought. +the Signalink USB (score: 1)
- Author: "David G3YYD" <g3yyd@btinternet.com>
- Date: Fri, 30 Sep 2016 15:13:40 -0500
- Thom Bad idea to use a USB serial port to generate FSK the reason being that Windows is not a real time operating system so there is substantial amount of timing jitter such as it can and does cause
- /archives//html/RTTY/2016-09/msg00209.html (11,474 bytes)
- 74. Re: [RTTY] Well darn... (score: 1)
- Author: "David G3YYD" <g3yyd@btinternet.com>
- Date: Thu, 13 Oct 2016 15:06:41 -0500
- I would like to make a correction FSK or AFSK is not the best performing transmitting method. The reason is simple all the good decoders use narrow filters on both tones and then decode the RTTY sign
- /archives//html/RTTY/2016-10/msg00151.html (11,735 bytes)
- 75. [RTTY] FW: Fwd: N1MM and Windows 7 install problem (score: 1)
- Author: "David G3YYD" <g3yyd@btinternet.com>
- Date: Wed, 19 Oct 2016 05:04:32 -0500
- Do you have the plugs in the sockets of the sound card? Some (maybe the majority today) sound cards detect whether a plug is inserted. If no plug then it will not appear available for use and thus wi
- /archives//html/RTTY/2016-10/msg00257.html (7,881 bytes)
- 76. Re: [RTTY] New amplifier announced (score: 1)
- Author: "David G3YYD" <g3yyd@btinternet.com>
- Date: Sat, 22 Oct 2016 16:07:25 -0500
- My ancient Heathkit SB220 built from a kit by myself in 1972 works at full power that is on the SSB setting without any problem. But I have replaced the original EHT transformer with a toroidal one t
- /archives//html/RTTY/2016-10/msg00284.html (10,466 bytes)
- 77. Re: [RTTY] New Radio (score: 1)
- Author: "David G3YYD" <g3yyd@btinternet.com>
- Date: Sun, 23 Oct 2016 15:12:27 -0500
- You could try a K3 next. I can say I have run a K3 (well 2 of them in fact) since 2008 and they work nicely at 100 watts on RTTY contesting. The RX is top of the tree in terms of performance. The pri
- /archives//html/RTTY/2016-10/msg00295.html (9,848 bytes)
- 78. Re: [RTTY] 2Tone (score: 1)
- Author: "David G3YYD" <g3yyd@btinternet.com>
- Date: Mon, 24 Oct 2016 11:40:02 -0500
- The narrowest occupied bandwidth is to use 2Tone DOOK this takes up less than 350Hz (that is at -80dB). There is also a slight receive decoder advantage when using 2Tone as a decoder as it is a bette
- /archives//html/RTTY/2016-10/msg00300.html (9,885 bytes)
- 79. [RTTY] New Radio...FSK and all that other stuff. (score: 1)
- Author: "David G3YYD" <g3yyd@btinternet.com>
- Date: Mon, 24 Oct 2016 15:15:40 -0500
- Change the AFSK tone so mark is 2KHz and 2170 for space then easy to do the subtract (LSB) to get true radiated mark frequency. Also all the logging programs I use have built into them the ability to
- /archives//html/RTTY/2016-10/msg00305.html (10,954 bytes)
- 80. [RTTY] Wanted 2Tone testers (score: 1)
- Author: "David G3YYD" <g3yyd@btinternet.com>
- Date: Tue, 01 Nov 2016 08:36:25 -0500
- I am experimenting with a new 2Tone capability that processes repeated strings. Example sending callsign or name or QTH or any 6 or longer RTTY character string twice with space characters between th
- /archives//html/RTTY/2016-11/msg00000.html (7,644 bytes)
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