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41. Re: [TenTec] Semi-conductor device (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Mon, 15 Sep 2003 09:38:30 -0500; MTM1N45 is a power MOSFET. Fits MY power supply but probably not a tentec power suppply. N type, 150 volts 45 amps. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson, electrical engin; /archives//html/TenTec/2003-09/msg00241.html (7,922 bytes)
42. Re: [TenTec] Semi-conductor device (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Mon, 15 Sep 2003 21:38:33 -0500; Similar but smaller. the 1 stands for drain current in amps, the N for N type (drain positive), and the 45 stands for 450 volts. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson, ele; /archives//html/TenTec/2003-09/msg00257.html (8,001 bytes)
43. Re: [TenTec] Curiosity Question (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Sat, 20 Sep 2003 20:23:22 -0500; There's a star wheel that a ball rides on to make the shaft position detent. Apply a dab of white grease to it to prolong its life. Then make sure the looseness isn't the knob. Tentec knobs aren't th; /archives//html/TenTec/2003-09/msg00295.html (7,729 bytes)
44. Re: [TenTec] Argonaut II backlight (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Sat, 20 Sep 2003 21:37:34 -0500; In the latest QST, All Electronics offers a luminescent strip that might be the right size for Tentecs that need a backlight. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson, electr; /archives//html/TenTec/2003-09/msg00299.html (7,280 bytes)
45. Re: [TenTec] Interesting problem and solution (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Mon, 22 Sep 2003 15:46:05 -0500; The coax cable passes RF to the control lines much better than the skinny audio cable. And despite the Gold may not have the shield grounded well at both ends or have enough shield braid to keep RF o; /archives//html/TenTec/2003-09/msg00332.html (7,909 bytes)
46. Re: [TenTec] BTW, Yahoo's privacy policy isn't as bad as... (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Wed, 24 Sep 2003 12:25:59 -0500; You don't have to accept or keep cookies. Gerald J. -- Entire content copyright Dr. Gerald N. Johnson, electrical engineer. Reproduction by permission only.; /archives//html/TenTec/2003-09/msg00404.html (7,285 bytes)
47. Re: [TenTec] Missing text (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Wed, 24 Sep 2003 19:18:20 -0500; 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson, electrical engineer. Reproduction by permission only.; /archives//html/TenTec/2003-09/msg00425.html (8,003 bytes)
48. Re: [TenTec] TenTec SCOUT feedback (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Sun, 28 Sep 2003 09:57:45 -0500; The power cord and connector of the Scout is notorious for excess voltage drop. It would lead to envelope modulation of the DC to the audio stage. 73, Jerry, K0CQ -- Entire content copyright Dr. Gera; /archives//html/TenTec/2003-09/msg00514.html (7,416 bytes)
49. Re: [TenTec] Argo V Distortion (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Sat, 09 Aug 2003 21:54:29 -0500; Differente radios have different sensitivities to RF on the microphone cable. Tentecs sometimes are among the more sensitive. A ground may help. Toroids around the microphone cable at the radio end m; /archives//html/TenTec/2003-08/msg00143.html (8,476 bytes)
50. Re: [TenTec] TWINCOM feedline ????????????? (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Sun, 10 Aug 2003 20:56:40 -0500; At least the first time it arrived, it arrived with a virus like attachment, a file with two extensions the first one innocous the second one executeable. I've destroyed to keep it from popping up he; /archives//html/TenTec/2003-08/msg00178.html (9,564 bytes)
51. Re: [TenTec] Another grounding question (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Mon, 11 Aug 2003 12:14:26 -0500; I keep tower and power grounds separated except when connected with coax cables. I disconnect all coax cables (using a patch panel of C coax connectors for rapid operations) when gone or lightning ap; /archives//html/TenTec/2003-08/msg00188.html (9,124 bytes)
52. Re: [TenTec] Another grounding question (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Mon, 11 Aug 2003 12:52:03 -0500; I dislike guy wire insulators and like to use the guy wires to spread out the tower grounding too. With my tower grounds separated from the house grounds I suffer no damage from direct hits on the to; /archives//html/TenTec/2003-08/msg00189.html (9,465 bytes)
53. Re: [TenTec] Another grounding question (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Tue, 12 Aug 2003 10:49:29 -0500; The theory of lightning protection by ground is that IF (and that is a super big IF) all the grounds are short and low inductance and good grounds that all the equipment and wiring will rise together; /archives//html/TenTec/2003-08/msg00223.html (11,088 bytes)
54. Re: [TenTec] Another grounding question (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Tue, 12 Aug 2003 11:54:37 -0500; However Bob, having been shunted to ground by good tower grounding the jump voltage is far smaller than that required to jump a few thousand feet. But its far more than equipment can stand on its own; /archives//html/TenTec/2003-08/msg00229.html (10,884 bytes)
55. Re: [TenTec] Argo Speech Processor Question (was Argo V distortion) (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Tue, 12 Aug 2003 18:29:21 -0500; The ORIGINAL Windom was a single wire feeder, always with a tuner and lots of RF in the shack. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson, electrical engineer. Reproduction by; /archives//html/TenTec/2003-08/msg00254.html (10,105 bytes)
56. Re: [TenTec] Argo Speech Processor Question (was Argo V distortion) (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Tue, 12 Aug 2003 20:25:57 -0500; I've had burned fingers during FD running the twinlead fed off center fed diople on some bands. Makes it less than my favorite. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson, elec; /archives//html/TenTec/2003-08/msg00265.html (11,139 bytes)
57. Re: [TenTec] Grounding question (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Wed, 13 Aug 2003 12:56:41 -0500; Grounding need not be only "ground rods." For eons, the buried copper wash boiler has been a far more effective "ground electrodes" much like a sheet of copper buried deep enough or a mesh of bare wi; /archives//html/TenTec/2003-08/msg00289.html (9,600 bytes)
58. Re: [TenTec] U-Bolts (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Fri, 15 Aug 2003 15:57:13 -0500; www.mcmaster.com -- Entire content copyright Dr. Gerald N. Johnson, electrical engineer. Reproduction by permission only.; /archives//html/TenTec/2003-08/msg00343.html (7,874 bytes)
59. Re: [TenTec] U-Bolts (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Fri, 15 Aug 2003 18:01:14 -0500; I think you mean KEPs, nuts with captive lock washers? McMaster-Carr stocks them, www.mcmaster.com 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson, electrical engineer. Reproduction; /archives//html/TenTec/2003-08/msg00346.html (8,372 bytes)
60. Re: [TenTec] Omni C on 17m (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Sat, 16 Aug 2003 21:02:12 -0500; There are two problems on 17m with the Omni C. The IF is 9 MHz, so the LO is mixed to 9 MHz also. Twice the LO injection is 18 MHz, twice the IF is 18 MHz, both roar through the mixer to produce spur; /archives//html/TenTec/2003-08/msg00360.html (8,422 bytes)

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