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101. Re: [TenTec] O2 output level with PSK aux in (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Wed, 11 Feb 2009 04:17:20 -0600; Yup a bad example. Not as sensitive and not as readily checked. With line input to the radio, the radio isn't nearly so sensitive to ground loop problems so only cables SHOULD be enough interface. I; /archives//html/TenTec/2009-02/msg00201.html (11,093 bytes)
102. Re: [TenTec] O2 output level with PSK aux (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Wed, 11 Feb 2009 19:59:13 -0600; You have it all WRONG. Go look at: http://bipt106.bi.ehu.es/psk31theory.html The envelope is the characteristic of two tones spaced 31 Hz apart. That's the beat note and the software makes the phase; /archives//html/TenTec/2009-02/msg00225.html (9,801 bytes)
103. Re: [TenTec] O2 output level with PSK aux (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Wed, 11 Feb 2009 21:18:59 -0600; When you inject a tone below the cutoff frequency of a high pass filter, often it takes very little distortion to make the second or third harmonic show up in the pass band of that high pass filter.; /archives//html/TenTec/2009-02/msg00227.html (11,001 bytes)
104. Re: [TenTec] Triton IV shutting down TT 262G Power Supply (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Tue, 24 Feb 2009 18:11:15 -0600; Power supply shutting down at too low a current? 73, Jerry, K0CQ; /archives//html/TenTec/2009-02/msg00350.html (8,435 bytes)
105. Re: [TenTec] TenTec Triton IV w/ TT 262G Power Supply (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Wed, 25 Feb 2009 20:18:23 -0600; Could be an overly sensitive current limiting section (often the PA transistor's only protection from a high SWR load in vintage Tentecs) like an open current sample resistor or solder connection to; /archives//html/TenTec/2009-02/msg00387.html (8,738 bytes)
106. Re: [TenTec] Aux Receiver input (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Thu, 26 Feb 2009 10:45:57 -0600; It probably depends on which Tentec? In my Corsair II schematic, I see there are two PIN diodes on the low pass filter board that are reverse biased to isolate the receiver (that's unhooked by the au; /archives//html/TenTec/2009-02/msg00403.html (10,058 bytes)
107. Re: [TenTec] Omni C help (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Thu, 01 Jan 2009 15:56:16 -0600; Kit with rebuilding instructions is about $25 from TenTec. Sometimes lubrication is all the PTO needs, but often parts are worn that come in the kit. 73, Jerry, K0CQ; /archives//html/TenTec/2009-01/msg00009.html (8,526 bytes)
108. Re: [TenTec] Omni C help (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Thu, 01 Jan 2009 19:06:33 -0600; The drive is spring loaded but when the vernier balls and race wear, the shaft develops end play and the PTO isn't far from the internal speaker that makes noise for side tone while sending CW too. W; /archives//html/TenTec/2009-01/msg00011.html (9,686 bytes)
109. Re: [TenTec] Omni C help (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Fri, 02 Jan 2009 12:31:13 -0600; There was a serious groove in the bronze race in my PTO bearing. The replacement had no such groove and drives the shaft through the whole range that the old one didn't. Remember the balls contact ar; /archives//html/TenTec/2009-01/msg00018.html (11,480 bytes)
110. Re: [TenTec] Omni C help (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Fri, 02 Jan 2009 12:37:43 -0600; And when the shaft is not supported by the balls and thrust assembly, it can move on its own due to speaker vibration or just relaxing from the last operator induced motion. E.g. it backs up, on its; /archives//html/TenTec/2009-01/msg00019.html (9,499 bytes)
111. Re: [TenTec] Omni V upgrade --and WTB front pop up stand (bail) (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Fri, 02 Jan 2009 13:01:49 -0600; It might be that stock buttons sold at Mouser or Digi-Key would fit and provide raw material for engraving experiments. Some cost 15 cents each. If engraving fails, it might be possible to use an ord; /archives//html/TenTec/2009-01/msg00020.html (8,891 bytes)
112. Re: [TenTec] TT meter lamps? (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Sun, 04 Jan 2009 11:12:33 -0600; Those lamps are also used for RV markers sold in the past by Grote, so most any car parts store, or truck stop, will have them on hand. Might be easier than ordering from Mouser, though mouser is eas; /archives//html/TenTec/2009-01/msg00030.html (7,721 bytes)
113. Re: [TenTec] 1208 Transverter (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Mon, 12 Jan 2009 22:40:26 -0600; The high drive may not blow the attenuator resistors instantly, but it won't help the RF detector that does the keying. Perhaps you could hook up a bias to the ALC jack at the same time and drive dow; /archives//html/TenTec/2009-01/msg00099.html (8,959 bytes)
114. Re: [TenTec] 1208 Transverter (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Tue, 13 Jan 2009 10:54:19 -0600; With 2 watt carbon resistors being hard to buy, and having a pronounced tendency to drift in value from heat, I'd prefer the 3 watt tin oxide film type resistor. I've tested them to ten times rated p; /archives//html/TenTec/2009-01/msg00103.html (9,901 bytes)
115. Re: [TenTec] Omni VI Opt 3 PSK 31 Operation (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Tue, 13 Jan 2009 11:06:44 -0600; Back it down until no one sees intermod products. Most receiving software shows intermod percents. Back it down until the quality is good. That's often smaller than the 25 watts you show. It doesn't; /archives//html/TenTec/2009-01/msg00104.html (8,374 bytes)
116. Re: [TenTec] 1208 Transverter (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Tue, 13 Jan 2009 14:05:26 -0600; Reports on RF switching diodes at HF that I've seen say the 1N4148 works but tends to have some distortion problems. The 1N4007 is indeed a halfway decent PIN diode and pretty rugged. The true made f; /archives//html/TenTec/2009-01/msg00108.html (9,521 bytes)
117. Re: [TenTec] Ten Tec OII - SSB Distortion (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Tue, 13 Jan 2009 15:32:08 -0600; ck Maybe its going to AM that raises the gain and it doesn't go back when changing to SSB. Try going to AM on another band, today on 10m you probably won't be noticed. Then try going to 160 AM on a d; /archives//html/TenTec/2009-01/msg00110.html (9,770 bytes)
118. Re: [TenTec] 1208 Transverter (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Tue, 13 Jan 2009 18:25:49 -0600; You can probably get a few for that much at your local RS. But on line they won't guarantee what their package of 25 for $2.79 contains. 1N4007 are 25/$1 at http://www.danssmallpartsandkits.net/ who; /archives//html/TenTec/2009-01/msg00114.html (9,718 bytes)
119. Re: [TenTec] 1208 Transverter (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Tue, 13 Jan 2009 18:29:22 -0600; I think there is only upside. The 1N4007 is a better RF switch than the 1N4148, but not as good as a diode made to be a PIN diode. The 1N4007 has an intrinsic region to give it better high voltage pe; /archives//html/TenTec/2009-01/msg00115.html (10,177 bytes)
120. Re: [TenTec] 1208 Transverter (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>; Date: Wed, 14 Jan 2009 11:58:24 -0600; There will greater intermod both receive and transmit with the 1N4007 over the true PIN diode, and more than that with the 1N4148. I know I've seen an article on the topic, probably in VHF Communicat; /archives//html/TenTec/2009-01/msg00123.html (10,311 bytes)

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