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61. Re: [RTTY] Kenwood IF filters ??? (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Thu, 18 Feb 2010 18:48:03 -0500
No. The RTTY shift is 170 Hz but there are keying sidebands that are necessary to proper decoding. As a rule of thumb you can add the shift plus three times the baud rate to get the bandwidth of an
/archives//html/RTTY/2010-02/msg00201.html (15,993 bytes)

62. Re: [RTTY] Kenwood IF filters ??? (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Thu, 18 Feb 2010 22:44:31 -0500
The concern is not so much the loss as the phase distortion that occurs when the signal is on the skirts of the filter. Phase distortion causes "smearing" of the bit transitions much like multipath
/archives//html/RTTY/2010-02/msg00205.html (14,571 bytes)

63. Re: [RTTY] MK2R SO2R Control (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Fri, 26 Feb 2010 02:30:22 -0500
Have you defined COM 11 for "Control" on Router's Ports tab? What is the status (open/closed/data rate) shown for the Control port on Router's Ports tab? 73, ... Joe, W4TV ___________________________
/archives//html/RTTY/2010-02/msg00247.html (8,660 bytes)

64. Re: [RTTY] Simple N1MM Logger Question (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Fri, 26 Feb 2010 22:18:21 -0500
No, N1MM Logger currently supports two RTTY interfaces - MMTTY for FSK or AFSK and MMVARI for AFSK and PSK31/63/125. N2AMG is working on support for fldigi but that will be crippled because fldigi d
/archives//html/RTTY/2010-02/msg00257.html (9,153 bytes)

65. Re: [RTTY] Low Tones (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 1 Mar 2010 16:00:39 -0500
Are you using FSK or AFSK? For AFSK, using high tones (2125/2295) places the tones such that any harmonics are eliminated by the transmitter IF filter. With low tones, harmonics caused by overdriving
/archives//html/RTTY/2010-03/msg00006.html (7,805 bytes)

66. Re: [RTTY] Low Tones (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 1 Mar 2010 23:30:31 -0500
For FSK and the K3 there is no advantage to either high or low tones. The comments about AFSK and low tones are valid for any radio. 73, ... Joe, W4TV _______________________________________________
/archives//html/RTTY/2010-03/msg00010.html (9,697 bytes)

67. Re: [RTTY] Manual (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sun, 18 Apr 2010 14:20:05 -0400
See: http://bama.edebris.com/manuals/dentron/gla1000b/ Since the GLA-1000B is rated to 800W CW ** INPUT **, you should not expect more than 400 - 500W output in CW. Given the cooling issues for the
/archives//html/RTTY/2010-04/msg00073.html (8,216 bytes)

68. Re: [RTTY] N1MM and MMTTY problem (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 19 Apr 2010 17:30:45 -0400
Which version of N1MM Logger? Have you properly set the "DigWindNr" for each digital port? Have you tried the "Give MMTTY Help Starting" option in the Digital Setup screen? Are the MMTTY installatio
/archives//html/RTTY/2010-04/msg00080.html (9,994 bytes)

69. Re: [RTTY] Fw: [rigblaster] Fw: Rigblaster Plug & Play Question (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Fri, 30 Apr 2010 12:15:14 -0400
The narrow IF filters are a significant advantage, not only for the AGC protection but in preventing IMD generation. No audio DSP can prevent the AGC and IMD problems. By the time the detected audio
/archives//html/RTTY/2010-04/msg00105.html (13,270 bytes)

70. Re: [RTTY] 200 hz filter on RTTY (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 01 Jun 2010 15:43:26 -0400
Most of the INRAD "250 Hz" filters are actually 325-275 Hz wide at the - 6dB points as the "250 Hz" is based on cascading a pair of filters in the IF (i.e., Yaesu or Kenwood style). As documented by
/archives//html/RTTY/2010-06/msg00009.html (10,182 bytes)

71. Re: [RTTY] E4X Palestine Country Status (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sun, 06 Jun 2010 11:13:10 -0400
Palestine is recognized as independently governed by the UN and has been assigned a call sign prefix block by the ITU. Both actions represent criteria for acceptance as a separate entity for DXCC pu
/archives//html/RTTY/2010-06/msg00037.html (9,026 bytes)

72. Re: [RTTY] MMTTY and EXTFSK at 75 baud... (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sun, 06 Jun 2010 11:25:46 -0400
Don, That's not the case. Just double checked here and microKEYER, microKEYER II, and DigiKeyer work correctly at 75 baud with MMTTY. I have not checked them with the MMTTY plug-in specifically under
/archives//html/RTTY/2010-06/msg00038.html (14,408 bytes)

73. Re: [RTTY] MMTTY and EXTFSK at 75 baud... (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sun, 06 Jun 2010 12:32:02 -0400
Set Baud Rate on the "Decode" tab in the MMTTY setup. I note WriteLog is setting the baud rate to 74.2 when the user selects "75 baud (100 WPM) Baudot"! I don't know if it makes a difference. I have
/archives//html/RTTY/2010-06/msg00042.html (17,807 bytes)

74. Re: [WriteLog] [RTTY] Correction: WriteLog + 75 Baud (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sun, 06 Jun 2010 12:42:17 -0400
Don, The problem is that the MMTTY plug-in does not change rates in response to changing the mode menu in RTTYrite. If you select 75 baud in RTTYrite, close MMTTY (close the RTTY Window or change TU
/archives//html/RTTY/2010-06/msg00043.html (9,179 bytes)

75. Re: [RTTY] [MMTTY] Re: BARTG 75Baud Sprint (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sat, 12 Jun 2010 10:10:20 -0400
If one is operating correctly a SO2R station has only one signal on the air at a time. PROPERLY DESIGNED SO2R controllers and software include interlocks to prevent transmitting on more than one rad
/archives//html/RTTY/2010-06/msg00099.html (7,389 bytes)

76. Re: [RTTY] Spot frequency (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sun, 13 Jun 2010 22:14:04 -0400
That's the problem ... there are too many software authors who don't care to educate their users and do not bother to provide the correct frequency (if they provide any RF frequency at all). These a
/archives//html/RTTY/2010-06/msg00143.html (11,503 bytes)

77. Re: [RTTY] Spot frequency (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sun, 13 Jun 2010 22:27:03 -0400
If you must use AFSK - even though the FT-1000 and its siblings make FSK so much easier - use the MENU SYSTEM to set things correctly (it's all in the manuals). Menu 6-4 "Packet Display Offset": Set
/archives//html/RTTY/2010-06/msg00145.html (12,526 bytes)

78. Re: [RTTY] Spot frequency (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Sun, 13 Jun 2010 22:49:20 -0400
One minor correction ... By setting "Packet tone frequency" to 2210 (Mark + shift/2) the filters will be properly centered on the AFSK tones. The 85 Hz offset is not a problem unless you try to use t
/archives//html/RTTY/2010-06/msg00147.html (13,709 bytes)

79. Re: [RTTY] BARTG 75 Sprint (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 14 Jun 2010 01:10:21 -0400
Maybe the broader question should be whether 75 baud ASCII (75 8N2) should replace 45.45 baud 5 bit codes (45.45 5N1.5) in general? The bandwidth requirements are very similar: CCIR 328-5 puts 45.45
/archives//html/RTTY/2010-06/msg00154.html (14,379 bytes)

80. Re: [RTTY] BARTG 75 Sprint (score: 1)
Author: "Joe Subich, W4TV" <lists@subich.com>
Date: Mon, 14 Jun 2010 02:59:32 -0400
Actually 8+start+stop to 5+start+stop. Since radio circuits are probably more reliable with two stop bits we're actually talking about 11/75 vs. 7.5/45.45 or 146.5 ms vs, 165 msec. That may be true
/archives//html/RTTY/2010-06/msg00160.html (11,532 bytes)

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