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81. Re: [TenTec] Narrow signal on 28.027620 MHz (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sat, 19 Dec 2009 19:14:33 -0600
What you are seeing is NOT a very narrow CW signal, you are seeing a signal tuned by a very high harmonic of the receiver LO. If it was an analogue receiver sweeping past the 500 HZ IF filter while t
/archives//html/TenTec/2009-12/msg00162.html (14,202 bytes)

82. Re: [TenTec] Centurion (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sun, 20 Dec 2009 02:16:52 -0600
RS doesn't admit the number on line. Brighter alternatives (but not significantly more input power) with much shorter lives include the 1813 and 1892 rated for 1000 hours vs 15,000 for the 756. All t
/archives//html/TenTec/2009-12/msg00169.html (9,584 bytes)

83. Re: [TenTec] Transverter Question (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Mon, 21 Dec 2009 11:07:51 -0600
I like my pair of FT-857D for VHF. I think the sensitivity rating of the Tentec 6N2 is about ten dB poorer than the real state of the art, but close to the performance of many Japanese radios though
/archives//html/TenTec/2009-12/msg00178.html (8,651 bytes)

84. Re: [TenTec] Optimizing 238 settings? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Mon, 28 Dec 2009 11:02:22 -0600
Its not that simple. Going to lower inductance and higher capacitance nearly always means going to a higher loaded Q and that means greater circulating current to heat the coil and so can raise the l
/archives//html/TenTec/2009-12/msg00226.html (10,523 bytes)

85. Re: [TenTec] High stability frequency reference oscillator for the Orion II (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Thu, 31 Dec 2009 11:34:58 -0600
High quality oscillators are available off the shelf for common frequencies like 10 or 27 MHz. Half a part per million holds an HF rig pretty good. A few years ago Luis CT1DMK published a programmabl
/archives//html/TenTec/2009-12/msg00268.html (13,283 bytes)

86. Re: [TenTec] Argonaut V gain help (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 05 Jan 2010 10:36:30 -0600
You could probably switch in a smaller attenuator outboard, but that wouldn't quiet the receiver's internal noise. Maybe its modular enough you could switch in an internal attenuator after the preamp
/archives//html/TenTec/2010-01/msg00027.html (8,330 bytes)

87. Re: [TenTec] OMNI VI - Low Power output (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sat, 09 Jan 2010 13:42:52 -0600
ALC/power detector diodes. I've heard of it before. 73, Jerry, K0CQ _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/list
/archives//html/TenTec/2010-01/msg00067.html (7,416 bytes)

88. Re: [TenTec] OMNI VI - Low Power output - Update (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sun, 10 Jan 2010 10:52:09 -0600
That has been reported on this forum in the past. Bad diodes upset the ALC. New diodes and it all worked great again. Sometimes the diodes were germanium, like 1N34A. One of the worlds lowest quality
/archives//html/TenTec/2010-01/msg00079.html (8,550 bytes)

89. Re: [TenTec] OMNI VI - Low Power output - Update (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sun, 10 Jan 2010 15:02:47 -0600
That definitely is the symptom. 73, Jerry, K0CQ _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec
/archives//html/TenTec/2010-01/msg00089.html (8,163 bytes)

90. Re: [TenTec] How well is a Scout on SSB? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Mon, 11 Jan 2010 19:20:37 -0600
The LM2950 family works down to about half a volt drop better than the LM7800 family or LM340 family that requires two volts headroom. There are others with lower drop this year, pages of them in the
/archives//html/TenTec/2010-01/msg00115.html (9,619 bytes)

91. Re: [TenTec] How well is a Scout on SSB? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Mon, 11 Jan 2010 21:00:38 -0600
Since I haven't a Scout manual or a Scout, I can't tell what the original parts are, or I could be more specific about useful replacements. And for tough situations I have (not quite TO220 package si
/archives//html/TenTec/2010-01/msg00122.html (9,162 bytes)

92. Re: [TenTec] Restoring backlighting for the Delta II or Its Argo brother??? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 12 Jan 2010 12:21:50 -0600
Applied voltage out of range, either high or low? 73, Jerry, K0CQ _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinf
/archives//html/TenTec/2010-01/msg00132.html (8,177 bytes)

93. Re: [TenTec] Renew License (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Thu, 14 Jan 2010 11:28:48 -0600
5yi will do it for a fee. FCC will do it but they've made it more complicated. Any local volunteer testing group can do it. It was really slick last time I did it through the ARRL. Basically you need
/archives//html/TenTec/2010-01/msg00148.html (8,645 bytes)

94. Re: [TenTec] Please help with touchy OMNI - D (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Fri, 15 Jan 2010 01:03:22 -0600
As posted, could be an overly sensitive breaker, or alc that lets you over drive the PA resulting in excess collector current, or something of a mismatch in the output section that lets the PA draw e
/archives//html/TenTec/2010-01/msg00163.html (9,811 bytes)

95. Re: [TenTec] filters (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sun, 17 Jan 2010 17:32:47 -0600
After using a Collins S-line on SSB, I think 2.4 is a bit wide. Collins used a 2.1 standard. Don't forget that you have to realign the BFO and its warps to use the wider filter. More filters are avai
/archives//html/TenTec/2010-01/msg00196.html (7,884 bytes)

96. Re: [TenTec] Corsair AGC problem (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sun, 17 Jan 2010 19:46:19 -0600
Molex plug where the external VFO would connect. Has jumpers in the "dummy" plug else nothing works. On the back panel. Won't have band present information, but will have VFO signal. 73, Jerry, K0CQ
/archives//html/TenTec/2010-01/msg00202.html (8,592 bytes)

97. Re: [TenTec] Omni VI+ the best and other great radios (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Thu, 21 Jan 2010 11:30:53 -0600
After you make sure its not your own door bell transformer thermal protector. 73, Jerry, K0CQ _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.co
/archives//html/TenTec/2010-01/msg00262.html (8,710 bytes)

98. Re: [TenTec] Omni VI+ the best and other great radios (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Thu, 21 Jan 2010 13:16:57 -0600
Using the HT or mobile VHF rig in AM mode rather than FM is a great deal more effective at finding noise sources. That's how the commercial finding receivers work, they use AM mode. Many modern hand
/archives//html/TenTec/2010-01/msg00265.html (11,059 bytes)

99. Re: [TenTec] digital (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Thu, 21 Jan 2010 13:24:58 -0600
You will need a cable or two from the Orion Auxiliary I/O connector to the computer sound card. See page 27 in your 566 manual for details. And software for the PC. 73, Jerry, K0CQ __________________
/archives//html/TenTec/2010-01/msg00266.html (7,206 bytes)

100. Re: [TenTec] digital (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Thu, 21 Jan 2010 17:09:51 -0600
Sure looks like Tentec has it answered. 73, Jerry, K0CQ _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec
/archives//html/TenTec/2010-01/msg00274.html (8,173 bytes)

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