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361. Re: [TenTec] Omni VI- PBT jumping after warm up. (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 13 Mar 2007 14:49:29 -0600
Its thermal. Could be an almost soldered connection, a connector, or inside a chip or transistor. You need a freeze mist and some warm air (hot air gun or hair dryer). When it changes go cool a secti
/archives//html/TenTec/2007-03/msg00302.html (8,679 bytes)

362. Re: [TenTec] Omni VI- PBT jumping after warm up. (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 13 Mar 2007 15:25:38 -0600
First cool the whole radio. Then warm just half of it. Then cool just a quarter. You may to try both halves and both quarters to see which has the effect. Then split that part in half and keep heatin
/archives//html/TenTec/2007-03/msg00305.html (8,761 bytes)

363. Re: [TenTec] Another "sometimes" audio problem Omni VI (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 13 Mar 2007 22:00:24 -0600
Same exact heat and cool cycle. Sounds like a missing solder connection that has oxidized over the years. Very likely its around the notch switch button. Or is in the switch contacts themselves. It c
/archives//html/TenTec/2007-03/msg00324.html (7,741 bytes)

364. Re: [TenTec] unsubscribe (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 15 Mar 2007 19:28:10 -0600
This is the wrong place for subscription requests, etc. Go look at that last link and it will tell you the right way. Or send an e-mail to tentec-request@contesting.com with one word in the title: He
/archives//html/TenTec/2007-03/msg00389.html (7,578 bytes)

365. Re: [TenTec] GFCI problem when running high power (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 27 Mar 2007 13:50:11 -0600
If you do add a capacitor, don't go to ground, go line to neutral. Too much C to ground will trip it from the line current not returned back through the neutral. RF trips of early GFCI were one of th
/archives//html/TenTec/2007-03/msg00655.html (8,209 bytes)

366. Re: [TenTec] Paragon II murphy! (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 29 Mar 2007 16:12:31 -0600
Kenwood bulletin (I don't remember the numbers) on the TS-120 and 130 says just that. I've lost track of the number of radios with such problems that I've fixed either locally, by e-mail, or by on th
/archives//html/TenTec/2007-03/msg00716.html (8,983 bytes)

367. Re: [TenTec] Airpax, (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 30 Mar 2007 10:24:31 -0600
Two critical parts that the Airpax fits. Near instantaneous magnetic trip, no thermal delay, and 20 amp rating. Most electronic vendor circuit breakers are thermal. Too slow by Tentec specs. There ar
/archives//html/TenTec/2007-03/msg00737.html (9,089 bytes)

368. Re: [TenTec] TT 1208 Transverter problem (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 30 Mar 2007 10:28:55 -0600
Many SWR bridges are not very accurate at low power. If its like my 2m to 6m transverter, there are a gaggle of resistors in parallel to take up to ten watts and then a series resistor to pick off a
/archives//html/TenTec/2007-03/msg00739.html (8,137 bytes)

369. Re: [TenTec] OT: Question on Coax Cable (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sat, 31 Mar 2007 11:07:12 -0600
For use on 80/40/20 in a 50' run, you won't detect a significant power loss in RG58 compared to these fancier coaxes. Their loss on HF is insignificantly better than plain old RG58. You would prefer
/archives//html/TenTec/2007-03/msg00779.html (10,583 bytes)

370. Re: [TenTec] QSK w/amplifier (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 03 Apr 2007 21:59:16 -0600
I can't speak directly about the HF amplifier, but many VHF amplifiers have a SSB/FM switch on the front panel that sets the time constant of the RF sensing. Short for FM, long for SSB (and CW). Many
/archives//html/TenTec/2007-04/msg00043.html (10,405 bytes)

371. Re: [TenTec] Help with blown Titan 425 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 06 Apr 2007 10:28:54 -0600
That 10 ohm resistor hasn't much drop at normal operating, maybe ten volts peak. Might part of its function besides limiting peak arc current in a tube be to act as a fuse? I know smaller resistors h
/archives//html/TenTec/2007-04/msg00115.html (8,840 bytes)

372. Re: [TenTec] Orion and Heath SB-1000 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 06 Apr 2007 13:28:55 -0600
You will probably need a relay or MOSFET interface to key the Heathkit amplifier unless it has (unlike earlier Heathkit amplifier) a 12 volt under 200 ma key input. -- 73, Jerry, K0CQ, All content co
/archives//html/TenTec/2007-04/msg00123.html (8,365 bytes)

373. Re: [TenTec] Orion and Heath SB-1000 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 06 Apr 2007 14:22:34 -0600
An ordinary diode with the anode on the control line and cathode to +12 should clamp at a lower voltage, though the circulating current from coil to diode will slow the relay fall out some. In some p
/archives//html/TenTec/2007-04/msg00125.html (9,356 bytes)

374. Re: [TenTec] Argonaut V or Jupiter (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 06 Apr 2007 19:28:10 -0600
FCC rules on amplifiers have been prohibiting any with that low an input because they would be appropriate for illegal use on CB. Since the amplifier is linear that 1.5 KW out amplifier that took 85
/archives//html/TenTec/2007-04/msg00141.html (9,445 bytes)

375. Re: [TenTec] Electric stove controls (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sun, 08 Apr 2007 17:41:21 -0600
Some have two sections to the element and so have three or four connections, most often three. With 240 volts and neutral supplied to the stove the switch can connect one section to 120, or even two
/archives//html/TenTec/2007-04/msg00181.html (9,402 bytes)

376. Re: [TenTec] international (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 11 Apr 2007 22:19:04 -0600
WU is less traceable than most other transactions. So much so it seems to be favored for some international scams. When a local ham tried to use WU to pay for some ham gear from Australia, his bank b
/archives//html/TenTec/2007-04/msg00240.html (9,504 bytes)

377. Re: [TenTec] Paragon Problem (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sat, 14 Apr 2007 11:43:02 -0600
While I have no experience with the Paragon, I'd first check board grounds that are often through the board mounting screws. Tighten them all over the radio. Then I'd suspect U1, but I'd be checking
/archives//html/TenTec/2007-04/msg00260.html (8,501 bytes)

378. Re: [TenTec] Argosy 525 question (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 19 Apr 2007 10:23:42 -0600
Dual with concentric shafts are uncommon these days for single orders. Dual with one shaft can be bought from Mouser (www.mouser.com) or Newark. Though it might be worth inquiring at TT parts as it m
/archives//html/TenTec/2007-04/msg00321.html (10,197 bytes)

379. Re: [TenTec] Argosy 525 - three different RX mixers? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 19 Apr 2007 17:12:29 -0600
Actually HP used to claim that Schottky diodes from the same envelope or batch were very closely matched which is a lot closer than silicon or germanium junction diodes matched. Remember that the jun
/archives//html/TenTec/2007-04/msg00330.html (10,033 bytes)

380. Re: [TenTec] Argosy 525 - three different RX mixers? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 19 Apr 2007 20:01:25 -0600
Depends on the integrated ring's properties. Balance isn't the only thing, dynamic range, insertion loss, and noise are factors in the radio's performance, only indirectly affected by balance. If the
/archives//html/TenTec/2007-04/msg00338.html (11,772 bytes)

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