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1. [TenTec] Argo V Distortion (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Sat Aug 9 23:58:01 2003; 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 (7,982 bytes)
2. [TenTec] TWINCOM feedline ????????????? (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Sun Aug 10 23:00:10 2003; 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 (9,067 bytes)
3. [TenTec] Another grounding question (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Mon Aug 11 14:18:13 2003; 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 (8,581 bytes)
4. [TenTec] Another grounding question (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Mon Aug 11 14:55:43 2003; 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 (8,930 bytes)
5. [TenTec] Another grounding question (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue Aug 12 12:53:33 2003; 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 (10,533 bytes)
6. [TenTec] Another grounding question (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue Aug 12 13:58:19 2003; 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 (10,309 bytes)
7. [TenTec] Argo Speech Processor Question (was Argo V distortion) (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue Aug 12 20:32:50 2003; 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 (9,558 bytes)
8. [TenTec] Argo Speech Processor Question (was Argo V distortion) (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue Aug 12 22:29:25 2003; 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 (10,572 bytes)
9. [TenTec] Grounding question (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Wed Aug 13 15:00:15 2003; 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 (9,068 bytes)
10. [TenTec] U-Bolts (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Fri Aug 15 18:00:35 2003; www.mcmaster.com -- Entire content copyright Dr. Gerald N. Johnson, electrical engineer. Reproduction by permission only.; /archives//html/TenTec/2003-08/msg00343.html (7,359 bytes)
11. [TenTec] U-Bolts (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Fri Aug 15 20:04:47 2003; 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 (7,861 bytes)
12. [TenTec] Omni C on 17m (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Sat Aug 16 23:05:43 2003; 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 (7,930 bytes)
13. [TenTec] Omni C on 17m (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Sun Aug 17 11:30:21 2003; No, Clark, the first IF of the Corsair is NOT 6.3 MHz. That's only the Bandpass Tuning IF of the RECEIVE IF. The transmit IF is still at 9 MHz as is the first receiver IF and the product detector. Th; /archives//html/TenTec/2003-08/msg00366.html (8,445 bytes)
14. [TenTec] 509 PTO how hard to rebuild is it? (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Sun Aug 17 11:30:30 2003; The grease in the PTO is probably hardened. Tentec sells a rebuild kit for a bit of $20 that includes grease and instructions. You NEED those instructions more than the parts. If its stiff its probab; /archives//html/TenTec/2003-08/msg00367.html (8,319 bytes)
15. [TenTec] Omni C on 17m (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue Aug 19 00:02:33 2003; The question to ask is:"What sideband is the normal sideband in that radio on 17m?" If its upper sideband there's a big transmit spur. If its lower sideband there's no spur. Its possible that it may; /archives//html/TenTec/2003-08/msg00400.html (8,879 bytes)
16. [TenTec] Scout PTO question (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue Aug 19 11:33:26 2003; The TenTec PTO is spring loaded and the spring gets compressed as you move the slug into the coil going down in frequency. Makes it stiffer at the low end than at the high end. 73, Jerry, K0CQ -- Ent; /archives//html/TenTec/2003-08/msg00404.html (7,219 bytes)
17. [TenTec] Scout PTO question (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue Aug 19 11:33:35 2003; Jumpy tuning sounds like hardened lubricant on the screw. The grounding strap should help mostly with hand capacitance effects. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson, elec; /archives//html/TenTec/2003-08/msg00405.html (7,141 bytes)
18. [TenTec] Omni C on 17m (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue Aug 19 13:34:41 2003; The spurs come from the second harmonic of the LO and a little from the second harmonic of the IF. The IF is right about 9 MHz and fixed, so that spur stays on 18.0 MHz. The LO injection is 9 MHz + t; /archives//html/TenTec/2003-08/msg00410.html (8,028 bytes)
19. [TenTec] Omni C on 17m (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Tue Aug 19 17:53:44 2003; The horse still isn't moving no matter how hard we kick! The shared crystal is for the 10 and 28 MHz bands. In the Omni C the crystal is 4 MHz to mix the 5 MHz vfo to 9 MHz where its second harmonic; /archives//html/TenTec/2003-08/msg00421.html (10,745 bytes)
20. [TenTec] 3N200 (score: 1): Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer); Date: Thu Aug 21 12:40:57 2003; Since double gate MOSFET transistors are no longer being made in silicon, supplying modified transistors is more than a little difficult. Seems to me that the forward transconductance of 10 to 15 mil; /archives//html/TenTec/2003-08/msg00455.html (7,664 bytes)

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