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361. Re: [TenTec] OT: Indoor antenna (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Mon, 29 Nov 2010 11:12:31 -0600
There have been such tables since antennas began. Certain lengths of the top and the feed are easier to feed being closer to resonance at a high or low impedance point at the transmitter end of the f
/archives//html/TenTec/2010-11/msg00473.html (11,919 bytes)

362. Re: [TenTec] OT: Indoor antenna (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Mon, 29 Nov 2010 14:00:41 -0600
If the rig can't accept 5% uncertainty in the antenna feed Z and resonance, its not going to work with ANY untuned antenna because they can change that much from wind, ice, rain and perched birds. Th
/archives//html/TenTec/2010-11/msg00482.html (11,505 bytes)

363. Re: [TenTec] omni 6+/ power issue (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Mon, 29 Nov 2010 22:50:49 -0600
There are always new chips that will work in the old sockets with programmers to match. The rub is in finding the code to put in the ROM that's custom to TenTec, if they won't admit having it. And fo
/archives//html/TenTec/2010-11/msg00513.html (10,828 bytes)

364. Re: [TenTec] OT: Indoor antenna (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 30 Nov 2010 03:12:31 -0600
I have to agree with attachments to the roof or the house. They don't add to pleasant life. Sure are nice for short feed lines, but unless you are in a place the wind never blows they can be annoying
/archives//html/TenTec/2010-11/msg00516.html (14,046 bytes)

365. Re: [TenTec] PTO Rebuild or not? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 30 Nov 2010 11:37:58 -0600
It took me three hours from beginning to extract the PTO to being ready to use the radio again. When you take the drive apart work over a cafeteria tray to catch the small balls that would otherwise
/archives//html/TenTec/2010-11/msg00531.html (9,141 bytes)

366. Re: [TenTec] PTO Rebuild or not? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 30 Nov 2010 13:37:08 -0600
Some PTOs need only fresh grease, the PTO in my Corsair II needed new metal parts, the races for the vernier were worn badly and it still would have slipped with only fresh sticky grease. 73, Jerry,
/archives//html/TenTec/2010-11/msg00535.html (9,904 bytes)

367. Re: [TenTec] Titan 425 Meter lamps? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sat, 02 Oct 2010 17:36:47 -0500
I've checked the downloaded manual. The lamps appear to be in series and are run off the 28 volt control supply through a 20 ohm 1/2 watt resistor. The maximum current (dissipating 1/2 watt) through
/archives//html/TenTec/2010-10/msg00052.html (10,760 bytes)

368. Re: [TenTec] Titan 425 Meter lamps? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sat, 02 Oct 2010 17:59:06 -0500
The lamps could be in parallel. The schematic is badly drawn. Two on line vendors of lamps http://www.donsbulbs.com/cgi-bin/r/b.pl/1820|28v|0.1a~usa.html and http://bulbster.com/lightbulbs/eiko-1820b
/archives//html/TenTec/2010-10/msg00054.html (11,450 bytes)

369. Re: [TenTec] Titan 425 Meter lamps? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sat, 02 Oct 2010 20:23:55 -0500
Then check the 20 ohm 1/2 watt resistor R5 on the display board that supplies the lamps. Two 1820 should have cooked all the smoke out of that resistor if its truly 20 ohms 1/2 watt. That being a non
/archives//html/TenTec/2010-10/msg00061.html (9,266 bytes)

370. Re: [TenTec] Auto Tuners (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sun, 03 Oct 2010 19:59:51 -0500
Check their specifications. I think they insist on tuning at low power to preserve the lives of the tiny relays they use. That they can carry but not switch 100 watts. And then tuning with a couple w
/archives//html/TenTec/2010-10/msg00076.html (9,580 bytes)

371. Re: [TenTec] Titan 425 Meter lamps? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 05 Oct 2010 14:01:51 -0500
I have 28 VDC replacements for my early Titan (S/N 425-00516) which was export model and I believe the lamps in my Titan 425E are in parallel. That's right -- it depends on the vintage of the Titan 4
/archives//html/TenTec/2010-10/msg00090.html (11,190 bytes)

372. Re: [TenTec] Omni VI on the fritz (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 05 Oct 2010 17:44:11 -0500
And any board mounting screws that often are ground connections. The plastic material relaxes the contact pressure, the very definition of "plastic." 73, Jerry, K0CQ I have seen some very strange phe
/archives//html/TenTec/2010-10/msg00096.html (9,352 bytes)

373. Re: [TenTec] Corsair II Amplifier Relay (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 05 Oct 2010 23:15:51 -0500
Why would you want a PIN diode? That relay doesn't handle RF, its to KEY the PA control circuit. You could replace it with a transistor, either bipolar or FET providing the PA keying circuit was at a
/archives//html/TenTec/2010-10/msg00108.html (8,277 bytes)

374. Re: [TenTec] Century 21 Analog Question... (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Thu, 07 Oct 2010 11:41:17 -0500
You might have to listen to the station on the hour and half hour to catch a station ID and maybe frequency. If they don't announce the frequency the FCC data base of call signs should give it. Then
/archives//html/TenTec/2010-10/msg00115.html (9,579 bytes)

375. Re: [TenTec] Century 21 Analog Question... (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Thu, 07 Oct 2010 12:55:33 -0500
Many ARRL handbooks in the past 20 or more years have included a high pass filter designed to reject all the AM broadcast band. I built one and it works well. 73, Jerry, K0CQ On 10/7/2010 12:08 PM, J
/archives//html/TenTec/2010-10/msg00120.html (9,048 bytes)

376. Re: [TenTec] Century 21 Analog Question... (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Thu, 07 Oct 2010 12:57:40 -0500
Certainly a possibility. 73, Jerry, K0CQ On 10/7/2010 11:47 AM, Mike Hyder -N4NT- wrote: I had a very similar thing on rigs in my shack. The trouble in my case was that the mechanical connections of
/archives//html/TenTec/2010-10/msg00121.html (8,724 bytes)

377. Re: [TenTec] For Sale (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sat, 09 Oct 2010 09:24:52 -0500
Probably needs new electrolytics on the processor (readout) board. Possibly just needs connections cleaned. 73, Jerry, K0CQ On 10/9/2010 3:09 AM, Jliving39@aol.com wrote: Folks, have a Corsair, origi
/archives//html/TenTec/2010-10/msg00137.html (7,538 bytes)

378. Re: [TenTec] 28.5 band segment on Omni D (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 12 Oct 2010 09:49:50 -0500
FM is mostly above 29.5. There have been experiments with FM AFSK packet above 29. Way long ago, SSB began at 28.5 and up. DX and CW below that. 73, Jerry, K0CQ I know it's nice to have everything wo
/archives//html/TenTec/2010-10/msg00158.html (8,170 bytes)

379. Re: [TenTec] 28.5 band segment on Omni D (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 12 Oct 2010 12:44:47 -0500
Sounds like switches and connectors all over need quarter drops of DeoxIT applied. Not sprayed. And board grounding screws need to be tightened. 73, Jerry, K0CQ I did get it to work, but it's still a
/archives//html/TenTec/2010-10/msg00161.html (8,612 bytes)

380. Re: [TenTec] F/S Tne Tec Orion II Model 566 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 12 Oct 2010 16:09:36 -0500
I've just the thing, a library table with sturdy oak legs, and an elm top, about 6' long by 30 or 36" deep. Weighs more than all the radios that can cover it put together. Even boat anchors and it wi
/archives//html/TenTec/2010-10/msg00167.html (8,996 bytes)

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