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321. [TenTec] Best Dummy Load Oil..?? (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Mon, 11 Jan 1999 14:56:16 -0600; Practically all oils will burn. They each have an ignition temperature, even the silicone based transformer oils though the silicone makes the ignition temperature much higher. Peanut oil is popular; /archives//html/TenTec/1999-01/msg00236.html (8,202 bytes)
322. [TenTec] Re: CW Practice on Omni (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Tue, 12 Jan 1999 12:06:19 -0600; Some people want the electronic keyer to emulate the vibroflex with dots at 100 wpm and dashes at 14 wpm... 73, Jerry, K0CQ -- FAQ on WWW: http://www.contesting.com/tentecfaq.htm Submissions: tentec@; /archives//html/TenTec/1999-01/msg00255.html (7,588 bytes)
323. [TenTec] Rebuilding slipping string dials (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Wed, 13 Jan 1999 10:40:36 -0600; When a string dial doesn't repeat its in need of attention. Its simpler than the Tentec PTO. In table radios, the problem usually was stiff grease on the slider guide or stiff oil in the idler pulley; /archives//html/TenTec/1999-01/msg00276.html (7,412 bytes)
324. [TenTec] Astron's (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Thu, 14 Jan 1999 14:57:04 -0600; Lower the line voltage. Put rubber blocks between the transformer core and the case to minimize oil can vibrations of the case. Mount the transformer on rubber blocks. Set the entire supple on rubber; /archives//html/TenTec/1999-01/msg00309.html (7,097 bytes)
325. [TenTec] Frozen VI+ (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Fri, 15 Jan 1999 09:49:45 -0600; It probably was wet inside from condensation. A longer warming and drying period probably was preferable. 73, Jerry, K0CQ -- FAQ on WWW: http://www.contesting.com/tentecfaq.htm Submissions: tentec@co; /archives//html/TenTec/1999-01/msg00333.html (7,157 bytes)
326. [TenTec] Field Strength meter ultra simple (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Fri, 15 Jan 1999 12:53:29 -0600; Your series diode with no DC return, e.g. a wire probe antenna probably won't work. It would be far better to connect the diode between - and plus terminals, then hook on the probe antenna. A shunt r; /archives//html/TenTec/1999-01/msg00340.html (7,316 bytes)
327. [TenTec] RE: Field Strength meter (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Sat, 16 Jan 1999 09:54:04 -0600; What? There's never been a color code that used green for 16. Never been a color code that used a single color for two digits. Never been a consistent capacitor color code. I'd say your red green red; /archives//html/TenTec/1999-01/msg00351.html (8,275 bytes)
328. [TenTec] RE: Field Strength meter (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Sat, 16 Jan 1999 16:12:56 -0600; Capacitor color codes are always in picofarads, never microfarads. Capacitors in microfarads other than decimal fractions are never used at RF. So you have 2500 pf. Each dot, or ring or spot sets a d; /archives//html/TenTec/1999-01/msg00356.html (8,554 bytes)
329. [TenTec] RE: Field Strength meter (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Sat, 16 Jan 1999 17:10:19 -0600; Then the book is WRONG. It might be a tantalum but they aren't common in 2500 uf. There's no need for such a value in a field strength meter. None whatsover. 73, Jerry, K0CQ -- FAQ on WWW: http://www; /archives//html/TenTec/1999-01/msg00359.html (7,844 bytes)
330. [TenTec] Scout problems mostly worked out. What I found. (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Tue, 19 Jan 1999 14:51:29 -0600; It should be possible with the LM2950 regulator family to regulate 12 volts internally with only a half volt head room or with a FET circuit I've sketched to regulate with only 50 millivolts of head; /archives//html/TenTec/1999-01/msg00395.html (7,917 bytes)
331. [TenTec] QRPp SSB from a Corsair II (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Wed, 20 Jan 1999 11:05:41 -0600; I'm figuring on adding a couple relays inside my Corsair II to bring out the low level driver and to separate receiver from transmitter. I want to add an external ALC input also. Otherwise it appears; /archives//html/TenTec/1999-01/msg00403.html (7,712 bytes)
332. [TenTec] QRPp SSB from a Corsair II (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Thu, 21 Jan 1999 11:08:10 -0600; One of my two relays will be to connect the receiver antenna switch internally for HF single coax work. As I plan it, the second relay will separate the drive after the LL driver. Takes a lot smaller; /archives//html/TenTec/1999-01/msg00419.html (8,405 bytes)
333. [TenTec] OMNI V J310's (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Fri, 22 Jan 1999 20:46:16 -0600; Fewer working J310 should increase the odds of intermod. They have individual source resistors to force some match. For better match, I'd match the drain currents for the same 100 ohm source resistor; /archives//html/TenTec/1999-01/msg00439.html (7,685 bytes)
334. [TenTec] OMNI-6+ audio gain control (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Sat, 23 Jan 1999 21:06:09 -0600; More simply, add a resistor about the value of the pot from wiper to common. That will bandspread the lower end of the pot. That will nearly convert a linear pot to an audio taper pot. Gerald -- FAQ; /archives//html/TenTec/1999-01/msg00458.html (8,354 bytes)
335. [TenTec] OMNI-6+ audio gain control (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Sat, 23 Jan 1999 21:12:30 -0600; Scratchy tends to come from having DC on the pot. Pots handling audio tend to not get scratchy as fast if not having DC to show up the noise. I don't notice such a crowding in my Corsair II. If anyth; /archives//html/TenTec/1999-01/msg00459.html (8,439 bytes)
336. [TenTec] OMNI-6+ audio gain control (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Sun, 24 Jan 1999 13:30:11 -0600; There is an easier fix. Add a resistor about the same value as the pot resistance from wiper to common. It gives the same effect as an audio taper potentiometer. 73, Jerry, K0CQ -- FAQ on WWW: http:/; /archives//html/TenTec/1999-01/msg00484.html (8,362 bytes)
337. [TenTec] OMNI V J310's (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Sun, 24 Jan 1999 13:30:01 -0600; To: <tentec@contesting.com> To: <tentec@contesting.com> To: <tentec@contesting.com> I think the devices are only matched when they have nearly the same currents with the same value source resistors.; /archives//html/TenTec/1999-01/msg00485.html (19,978 bytes)
338. [TenTec] Corsair II noisy RX? (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Sun, 24 Jan 1999 21:27:45 -0600; My Corsair II doesn't act quite that way. With the RF gain at zero, wide band audio noise is barely detectable with the audio gain full up. With the audio at anything useful, the RF noise rises at ab; /archives//html/TenTec/1999-01/msg00493.html (8,115 bytes)
339. [TenTec] Paragon fuse type?? (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Mon, 25 Jan 1999 23:57:18 -0600; In my opinion it should be 16 or 20 amps fast blow. Though the normal fast blow fuses is often not fast enough to act as more than an indicator so a solid state failure. Often power transistors die m; /archives//html/TenTec/1999-01/msg00534.html (7,446 bytes)
340. [TenTec] Front end active devices J310 (score: 1): Author: geraldj@ames.net (Dr. Gerald N. Johnson, P.E.); Date: Thu, 28 Jan 1999 00:37:20 -0600; Sure, balance means the source resistors match too. The low pass filter and often the antenna tuner have no conductive shunt elements so are no lightning protection. A shorted quarter wave stub can b; /archives//html/TenTec/1999-01/msg00566.html (7,877 bytes)

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