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321. Re: [TenTec] swr (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Mon, 16 Aug 2010 21:22:10 -0500
The SWR is high, the resistive part of the impedance is very low and the reactive part is very high. The high SWR makes the losses in the coax higher, but at 160m the losses are very low to begin wit
/archives//html/TenTec/2010-08/msg00235.html (9,630 bytes)

322. Re: [TenTec] Test again (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 17 Aug 2010 03:59:21 -0500
I REPEAT: It will take your e-mail address and insist on a password. You don't remember the password, it has a button marked unsubscribe and get password reminder. Bash that button, and the next page
/archives//html/TenTec/2010-08/msg00240.html (10,177 bytes)

323. Re: [TenTec] swr (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 17 Aug 2010 04:31:46 -0500
On HF the atmospheric noise is so high that 99% loss in the tuner with most receivers (other than a very simple direct conversion radio or a crystal set) are limited by atmospheric noise, not receive
/archives//html/TenTec/2010-08/msg00241.html (15,716 bytes)

324. Re: [TenTec] swr (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 17 Aug 2010 04:41:18 -0500
At the moment, I have a disagreement with the QST technical editor. In the April QST he wrote that you can't make a parallel transmission line with impedance lower than 87 ohms. That shows he's using
/archives//html/TenTec/2010-08/msg00243.html (10,998 bytes)

325. Re: [TenTec] swr (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 17 Aug 2010 10:38:36 -0500
A box possibly built to have much lower losses and far better survivability than the $400 auto tuner since the box is made specifically for that antenna. Changing the losses from 90% or more in the a
/archives//html/TenTec/2010-08/msg00248.html (10,252 bytes)

326. Re: [TenTec] swr (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 17 Aug 2010 13:16:42 -0500
My point entirely. I suggested the AV-6110 in jest (where I should have marked it with ;<)_)but its a real solution for those long in pocket and short on building. 73, Jerry, K0CQ ___________________
/archives//html/TenTec/2010-08/msg00254.html (8,656 bytes)

327. Re: [TenTec] swr (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 17 Aug 2010 14:38:18 -0500
All hams need to learn about antennas and that makes this as appropriate a forum as any. No ham station makes contacts without any antenna. 73, Jerry, K0CQ ___________________________________________
/archives//html/TenTec/2010-08/msg00256.html (8,350 bytes)

328. Re: [TenTec] swr (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Wed, 18 Aug 2010 09:11:29 -0500
And the thread started with a user of Tentec rig and amplifier having a tuner change tune on its own while feeding a 43' vertical tuned only by the tuner (not tentec). Where two fundamentals came to
/archives//html/TenTec/2010-08/msg00272.html (9,657 bytes)

329. Re: [TenTec] Omni VI D4-D5 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Wed, 18 Aug 2010 09:25:49 -0500
The two diodes are the RF switch for the Auxiliary receiver input or output. The diodes are operated as PIN diodes though 1N4007 are not the greatest PIN diodes. I suspect yours may be counterfit and
/archives//html/TenTec/2010-08/msg00273.html (11,064 bytes)

330. Re: [TenTec] Headphones for ORION I? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Wed, 18 Aug 2010 13:36:52 -0500
Yes that will check out the cans. I never had a SteppIR, don't plan on having one, but when they don't break they do function. Back in the 50s and 60s my dad and I built a 20 meter beam with ground a
/archives//html/TenTec/2010-08/msg00278.html (10,868 bytes)

331. Re: [TenTec] Intermitten Omni VI RX Falloff (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Thu, 19 Aug 2010 22:20:59 -0500
Aux RX switch on the back of the radio. Needs cleaning. 73, Jerry, K0CQ _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/l
/archives//html/TenTec/2010-08/msg00288.html (8,193 bytes)

332. Re: [TenTec] filter (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Fri, 20 Aug 2010 10:42:35 -0500
A roofing filter is the first filter the signal reaches that is similar bandwidth to the signal in the receiver. The closer it is to the antenna the least effort the following stages have in handling
/archives//html/TenTec/2010-08/msg00291.html (8,411 bytes)

333. Re: [TenTec] Argosy Filter (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sat, 21 Aug 2010 14:56:08 -0500
Not in any Collins while Art was in charge. He specifically forbade using those RCA tubes where Eimacs did the job. 73, Jerry, K0CQ _______________________________________________ TenTec mailing list
/archives//html/TenTec/2010-08/msg00312.html (7,524 bytes)

334. Re: [TenTec] Argosy Filter (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sat, 21 Aug 2010 18:20:52 -0500
Lots of the original 4 crystal filters were replaced by 8 crystal filters to have better skirt selectivity and signal rejection out of the passband. 73, Jerry, K0CQ __________________________________
/archives//html/TenTec/2010-08/msg00316.html (12,509 bytes)

335. Re: [TenTec] Intermitten Omni VI RX Falloff (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sat, 28 Aug 2010 14:09:39 -0500
That's where it is on the Omni VI I see when I checked the manual. On my Corsair II its on the back panel and handles RF. Tends to go open disconnecting the receiver from the transmit antenna. So its
/archives//html/TenTec/2010-08/msg00337.html (11,416 bytes)

336. Re: [TenTec] Looking for "cheap" rig or honest and patient ham (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Thu, 02 Sep 2010 12:33:22 -0500
The TS-120 and TS130 were solid rigs, but didn't have the strong signal handling receiver of the later Tentecs. The 820/830 is a bit more complex and I've seen it confuse new hams. It also needs to b
/archives//html/TenTec/2010-09/msg00003.html (10,353 bytes)

337. Re: [TenTec] Looking for "cheap" rig or honest and patient ham (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Thu, 02 Sep 2010 14:49:09 -0500
Its detectable but not disastrous. Some strong signals have a bit of splatter that's not heard with a Corsair II on the same antenna. Another feature of the 120 and 130 is that the PA protection from
/archives//html/TenTec/2010-09/msg00007.html (10,233 bytes)

338. Re: [TenTec] Unscribe (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Fri, 03 Sep 2010 10:48:54 -0500
Do it yourself. No list participant can other than the administrator. Go to http://lists.contesting.com/mailman/listinfo/tentec that is on the bottom of EVERY post for instructions. 73, Jerry, K0CQ I
/archives//html/TenTec/2010-09/msg00033.html (7,278 bytes)

339. Re: [TenTec] New to TT and the list (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Fri, 03 Sep 2010 13:45:31 -0500
Not at low power. I use a 15 amp fast blow automotive fuse made by a reputable manufacturer (Buss) to protect my Corsair II. So far I've blown a couple fuses tuning a manual tuner at full power, but
/archives//html/TenTec/2010-09/msg00040.html (9,994 bytes)

340. Re: [TenTec] Ten Tec Power Supplies (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Fri, 03 Sep 2010 13:57:39 -0500
So you have abandoned the current limiting of the Tentec PS which protected the PA from mismatched tuning the caused high collector current. Out of the frying pan (as yet not heated because the singl
/archives//html/TenTec/2010-09/msg00041.html (10,775 bytes)

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