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21. Re: [RTTY] Guess I have been away longer than I thought. +the Signalink USB (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Fri, 30 Sep 2016 10:36:06 -0700
Take a look at http://www.frontiernet.net/~aflowers/tinyfsk/ http://www.kc4zvw.org/fskit.html Andy, K0SM/2's TinyFSK is an FSK interface that maintains proper 45.45 baud keying (which you will find
/archives//html/RTTY/2016-09/msg00208.html (9,452 bytes)

22. Re: [RTTY] FW: Fwd: N1MM and Windows 7 install problem (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Wed, 19 Oct 2016 10:02:35 -0700
The bottom line is Audio input appears to work with Wine, and with Linux by itself, but not through VirtualBox? Do you know if VirtualBox comes with a driver for a generic 16-bit USB sound card? Can
/archives//html/RTTY/2016-10/msg00264.html (8,188 bytes)

23. Re: [RTTY] New Radio...FSK and all that other stuff. (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Mon, 24 Oct 2016 11:33:59 -0700
In the days when I was still using superhets, the FT-990, FT-1000MP and the K3 all had a frequency display offset which you can select under AFSK mode. Shop around (for the used rigs in your $800 ta
/archives//html/RTTY/2016-10/msg00302.html (8,067 bytes)

24. Re: [RTTY] 2Tone (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Mon, 24 Oct 2016 14:55:30 -0700
"DOOK" (differential on-off keying) is what David calls the method that 2Tone uses to generate an RTTY signal. fldigi uses a similar scheme, but did not give it any name (it is just "AFSK" to fldigi
/archives//html/RTTY/2016-10/msg00314.html (10,383 bytes)

25. Re: [RTTY] FSK is bad? (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Tue, 25 Oct 2016 14:51:25 -0700
With FSK, you are at the mercy of the rig manufacturer. Some rigs use the "FSK" facility in the synthesizer chips, so even the rig manufacturer has no control of it, the chip manufacturer does. And
/archives//html/RTTY/2016-10/msg00340.html (9,489 bytes)

26. Re: [RTTY] FSK is bad? (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Tue, 25 Oct 2016 15:14:04 -0700
"you have full control" is perhaps a little overstated. It should be "the software developer" has full control :-) :-). 73 Chen, W7AY _______________________________________________ RTTY mailing lis
/archives//html/RTTY/2016-10/msg00342.html (8,386 bytes)

27. Re: [RTTY] FSK is bad? (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Tue, 25 Oct 2016 19:02:57 -0700
As far as I know, you are not wrong, Rich. Flex Radio has an opportunity to do much better, seeing their transmitter is a real DUC (digital up conversion). But I wouldn't count on it ever happening.
/archives//html/RTTY/2016-10/msg00358.html (9,701 bytes)

28. Re: [RTTY] (F)SK is bad? (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Tue, 25 Oct 2016 19:22:53 -0700
You are dating yourself, Peter. That was in the last century, HI HI. The FT-990 and FT-1000D took the FSK keying input and convert to AFSK tones, and use the tones to modulate the SSB transmitter. S
/archives//html/RTTY/2016-10/msg00359.html (7,476 bytes)

29. Re: [RTTY] Noisy computer line in (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Sun, 15 Jan 2017 10:32:22 -0800
This probably happens more often than you think :-). I have many times received email that cocoaModem was not decoding well even with clean loud signals. I tell them to make sure the sound interface
/archives//html/RTTY/2017-01/msg00051.html (8,102 bytes)

30. Re: [RTTY] For Sale: issues of RTTY Digital Journal (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Sun, 19 Feb 2017 10:49:03 -0800
Before he passed away, Wayne K7WM had created and sold a set of 9 CD-ROMs that had all the RTTY Bulletin/RTTY Journal/Digital Journal from 1953 through 2003. I am fortunate enough to have bought the
/archives//html/RTTY/2017-02/msg00160.html (7,604 bytes)

31. [RTTY] Archive for RTTY Journal (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Tue, 21 Feb 2017 14:32:48 -0800
Bill Henry has very generously agreed to make the RTTY Journals available for public downloading. I now have the archives at my web site (warning, very large files). (Hi Bill, long time no exchange e
/archives//html/RTTY/2017-02/msg00175.html (9,290 bytes)

32. Re: [RTTY] Greater than 600 watts for RTTY (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Sat, 25 Mar 2017 19:15:10 -0700
When all else is constant, a 10 dB gain (100 watts to 1 kW) can make a marginal signal turn into a perfectly printable signal when conditions are perfect (no fading, no selective fading, no Doppler s
/archives//html/RTTY/2017-03/msg00108.html (12,200 bytes)

33. Re: [RTTY] Decoding troubles after taking a break (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Sun, 16 Jul 2017 13:37:51 -0700
Why not use a sampling rate of 48000, if it is available on your sound card? First a digression... There are two "standards" in the audio world. When people needed wider bandwidths, they naturally w
/archives//html/RTTY/2017-07/msg00051.html (12,649 bytes)

34. Re: [RTTY] Key clicks seemed less severe last weekend (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Thu, 28 Sep 2017 08:32:02 -0700
The only manufacturer that changed behavior was Elecraft. Instead, the reduced keyclicks have come from change in behavior of operators, as more people turn to use AFSK. This is especially true as p
/archives//html/RTTY/2017-09/msg00079.html (8,902 bytes)

35. Re: [RTTY] New Radio (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Thu, 28 Sep 2017 08:42:36 -0700
Not just a second antenna port, but a completely separate second ADC. I.e., it is the equivalent of two Icom 7300, and with better front end filtering than the 7300. I have one on "reserve" since Ja
/archives//html/RTTY/2017-09/msg00080.html (9,013 bytes)

36. Re: [RTTY] TinyFSK? COM? RPi? (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Fri, 27 Oct 2017 12:53:41 -0700
The one gotcha I can think of is that if you run something like Raspbian on your Raspberry Pi, you will need to power it down in an orderly fashion, or you will be forever reflashing the microSD car
/archives//html/RTTY/2017-10/msg00110.html (7,253 bytes)

37. Re: [RTTY] TinyFSK (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Wed, 20 Dec 2017 14:32:45 -0800
Peter, You might consider using something like Eagle to whip up a simple two sided board. For something this small and simple, you can use the free version of Eagle (both Mac and Windows versions ava
/archives//html/RTTY/2017-12/msg00045.html (11,097 bytes)

38. Re: [RTTY] TinyFSK (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Wed, 20 Dec 2017 14:43:56 -0800
I was assuming perhaps 3 to 3-1/2 square inches to carry the Arduino Nano plus a couple of RCA jacks, i.e., $15 to $17.50 for the three boards that you get back. 73 Chen, W7AY ______________________
/archives//html/RTTY/2017-12/msg00046.html (8,523 bytes)

39. Re: [RTTY] TinyFSK (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Wed, 20 Dec 2017 16:05:18 -0800
Ummm, you still need to mount a couple of transistors and resistors :-). 73 Chen, W7AY _______________________________________________ RTTY mailing list RTTY@contesting.com http://lists.contesting.c
/archives//html/RTTY/2017-12/msg00049.html (8,318 bytes)

40. Re: [RTTY] (no subject) (score: 1)
Author: Kok Chen <rtty@w7ay.net>
Date: Sun, 24 Dec 2017 12:11:28 -0800
More misspellings... Suk san wan chrismas and Sheng dan kuai le, one and all (my first and second languages before I learned barbaric languages :-). 73 Chen, W7AY ___________________________________
/archives//html/RTTY/2017-12/msg00056.html (7,328 bytes)

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