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221. Re: [TenTec] FW: [QRP-L] Next problem with cw on Corsair (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sun, 19 Nov 2006 22:12:48 -0600
That works well so long as the HQ180 doesn't wander off the frequency. -- 73, Jerry, K0CQ, All content copyright Dr. Gerald N. Johnson, electrical engineer ___________________________________________
/archives//html/TenTec/2006-11/msg00281.html (9,160 bytes)

222. Re: [TenTec] FW: [QRP-L] Next problem with cw on Corsair (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 21 Nov 2006 20:14:14 -0600
They really needed that since their transmitter was miles from their shack and on a different frequency that they were receiving on. -- 73, Jerry, K0CQ, All content copyright Dr. Gerald N. Johnson, e
/archives//html/TenTec/2006-11/msg00307.html (9,492 bytes)

223. Re: [TenTec] Adapting PTO style Ten-Tec transceivers for FSK (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 23 Nov 2006 11:34:50 -0600
AFSK doesn't work all that badly unless you have a lot of filter blow around in transmit, over drive the radio, or pick tones that have harmonics in the transmit pass band. I used symmetrical triangu
/archives//html/TenTec/2006-11/msg00336.html (9,571 bytes)

224. Re: [TenTec] Ten Tec Jupiter (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sun, 26 Nov 2006 13:16:47 -0600
100% upward modulation of an AM carrier doubles the transmitter output voltage. That quadruples power at the peak. So in a linear type radio that is good for 100 watts CW and 100 watts peak SSB, the
/archives//html/TenTec/2006-11/msg00371.html (8,224 bytes)

225. Re: [TenTec] Omni VI first impressions (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sun, 26 Nov 2006 14:14:56 -0600
When a tiny adjustment of the offset frequency moves the beat out of the pass band it sounds to me like a harmonic beat. As if the oscillator has too many harmonics from overdriving a mixer, or as yo
/archives//html/TenTec/2006-11/msg00372.html (11,117 bytes)

226. Re: [TenTec] RX input Orion 1 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Mon, 27 Nov 2006 10:06:42 -0600
Last I checked, silicon switching diodes don't start to conduct until 0.6 volts forward. At 0.25 volts, good diodes have megohms of impedance. If you have 20 volts on a 50 ohm system, you have 8 watt
/archives//html/TenTec/2006-11/msg00407.html (10,768 bytes)

227. Re: [TenTec] Corsair II manual available (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 28 Nov 2006 17:46:17 -0600
Does it have a parts list? -- 73, Jerry, K0CQ, All content copyright Dr. Gerald N. Johnson, electrical engineer _______________________________________________ TenTec mailing list TenTec@contesting.c
/archives//html/TenTec/2006-11/msg00418.html (7,425 bytes)

228. Re: [TenTec] Ten Tec supplied documentation (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 28 Nov 2006 22:49:51 -0600
While I've not yet found such a parts list, the index to my Corsair II manual has a page for it. That's why I ask. -- 73, Jerry, K0CQ, All content copyright Dr. Gerald N. Johnson, electrical engineer
/archives//html/TenTec/2006-11/msg00428.html (10,302 bytes)

229. Re: [TenTec] Shields in Omni VI (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 28 Nov 2006 22:57:03 -0600
Doesn't NAR change the filter bandwidth and then the controller adjust the BFO frequency and the main oscillator frequencies to keep the offset from BFO to IF filter the same and the main oscillator
/archives//html/TenTec/2006-11/msg00429.html (9,795 bytes)

230. Re: [TenTec] Ten Tec supplied documentation (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 28 Nov 2006 23:14:50 -0600
The last one. Page 3-34. -- 73, Jerry, K0CQ, All content copyright Dr. Gerald N. Johnson, electrical engineer _______________________________________________ TenTec mailing list TenTec@contesting.com
/archives//html/TenTec/2006-11/msg00431.html (8,234 bytes)

231. Re: [TenTec] Model 260 PSU problem (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 01 Dec 2006 13:46:48 -0600
I'd think that for 2.60 at one of the good UK radio parts places you should find one with the same package too. 35 amps and 100 volts is probably good enough, 400 volts won't hurt. Which ever it will
/archives//html/TenTec/2006-12/msg00002.html (8,750 bytes)

232. Re: [TenTec] Model 260 PSU problem (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 01 Dec 2006 17:01:45 -0600
I've seen that package in catalogs. Never in the solid though. Likely the flange matches a TO-3 case. So I guess you need a new hole in the heat sink right in the middle. -- 73, Jerry, K0CQ, All cont
/archives//html/TenTec/2006-12/msg00005.html (8,181 bytes)

233. Re: [TenTec] Model 260 PSU problem (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sat, 02 Dec 2006 12:55:52 -0600
For sure. The half wave rectifier puts unbalanced DC in the transformer and that biases the core so it's certainly running much further into saturation that it was designed for. And being a 50/60 Hz
/archives//html/TenTec/2006-12/msg00020.html (9,358 bytes)

234. Re: [TenTec] PTO help? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 05 Dec 2006 12:37:17 -0600
I did mine on the kitchen table. You want to work IN a serving tray with no gaps so that the little balls can't escape. That tray then would be easy to set on a shelf between work sessions. -- 73, Je
/archives//html/TenTec/2006-12/msg00066.html (8,170 bytes)

235. Re: [TenTec] Circuit breaker tripping excessively (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 07 Dec 2006 11:38:26 -0600
Makes me wonder if some RF is leaking out the power wires of the transceiver trip the electronic circuit breaker. A symptom of using rolled paper capacitors where disc ceramics with short leads are n
/archives//html/TenTec/2006-12/msg00109.html (10,559 bytes)

236. Re: [TenTec] Circuit breaker tripping excessively (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 07 Dec 2006 13:26:51 -0600
Look where the power wires run inside the radio. If Tentec paid the same attention to that as in my 2m to 6m transverter (no care at all) the wires could be close to the PA output transformer or a lo
/archives//html/TenTec/2006-12/msg00115.html (12,433 bytes)

237. Re: [TenTec] Noise Reduction Setting (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 08 Dec 2006 01:43:59 -0600
SAW devices can do the autocorrelation process. Might be two input transducers, at different distances from the output transducer. The distance chosen to put a preferred frequency in phase, but noise
/archives//html/TenTec/2006-12/msg00137.html (10,413 bytes)

238. Re: [TenTec] Noise Reduction Setting (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 08 Dec 2006 11:32:14 -0600
While the effect on the output spectrum is that of a bandpass filter, I don't think NR works that way. I think it works on correlation of the pass band with a time delayed copy of the pass band. When
/archives//html/TenTec/2006-12/msg00147.html (10,944 bytes)

239. Re: [TenTec] Corsair II AGC (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 08 Dec 2006 15:46:13 -0600
I'm pretty sure the AGC in the Corsair II is derived from audio after the detector, and so after all the crystal filters but before the audio filter. So that has to be where the AGC pumping came from
/archives//html/TenTec/2006-12/msg00150.html (8,075 bytes)

240. Re: [TenTec] Noise Reduction Setting (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 08 Dec 2006 22:53:02 -0600
Yes the working autocorrelator has an output spectrum a lot like a narrow bandpass filter with flat skirts not all that far down. The noise reduction depends on the noise being truly random (which is
/archives//html/TenTec/2006-12/msg00168.html (12,155 bytes)

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