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341. Re: [TenTec] What is "blow by"? (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Fri, 14 Dec 2001 01:15:30 -0600
Blow by sounds like what a receiver with a very broad filter, except filter blow by is weaker than what it would have been in the very wide receiver. Can be both high beat frequency and the other sid
/archives//html/TenTec/2001-12/msg00132.html (7,229 bytes)

342. Re: [TenTec] Corsair II digital readout (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Thu, 08 Nov 2001 16:06:10 -0600
Check the 5 volt power to the digital readout microprocessor and replace any electrolytic bypass capacitors in the module. Try the keyer, its in the same computer chip. Tighten the board mounting scr
/archives//html/TenTec/2001-11/msg00069.html (7,604 bytes)

343. Re: [TenTec] Corsair II digital readout (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Sun, 11 Nov 2001 09:46:37 -0600
Solder joints and crystal are suitable suspects after power supply and aluminum electrolytics (that by now are essentially open). I don't know what the Corsair I used for that chip, the chip in the C
/archives//html/TenTec/2001-11/msg00103.html (8,164 bytes)

344. Re: [TenTec] 30M "freebanders"?, scratchy Argosy audio filter switch (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Sun, 11 Nov 2001 19:37:36 -0600
Deoxit by Cramolin for the switches. I thought I noticed some voice on 30m a week or two ago. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson. Reproduction by permission only.
/archives//html/TenTec/2001-11/msg00108.html (7,729 bytes)

345. Re: [TenTec] Omni-D signal warbling? (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Mon, 19 Nov 2001 13:44:02 -0600
Yup, end play in the PTO shaft leads to backlash and warble. There might be a need to check the thread in the pistol. It may be worn but there's supposed to be a spring to take care of wear for a lon
/archives//html/TenTec/2001-11/msg00170.html (7,355 bytes)

346. Re: [TenTec] Re: OMNI-6 volume control (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Wed, 21 Nov 2001 19:21:55 -0600
You can make a linear pot very nearly logarithmic by loading it with a resistor. Connect a resistor with value between 1/2 and 1 times the resistance of the pot from common to wiper. The lower value
/archives//html/TenTec/2001-11/msg00190.html (7,737 bytes)

347. Re: [TenTec] Re: QSK Problems (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Wed, 28 Nov 2001 00:31:39 -0600
Not likely that the NE-2 will do much protection. It will probably explode at less than 100 ma. current while the PA tube flash over is likely to be a few amps. A LARGE 50 volt zener diode may be mor
/archives//html/TenTec/2001-11/msg00280.html (7,508 bytes)

348. Re: [TenTec] Paragon II Monitoring note (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Wed, 28 Nov 2001 11:53:16 -0600
I clean up the sidetone on my Corsair II (when it bothers me) with an external DSP filter. The raspy sidetone is a Tentec characteristic, comes from using a relaxation oscillator that starts and stop
/archives//html/TenTec/2001-11/msg00289.html (8,039 bytes)

349. Re: [TenTec] 4-pin inline male mic jack (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Thu, 29 Nov 2001 12:37:06 -0600
Hosfelt 800-524-6464 Cat no 4ILC, $3.50 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson. Reproduction by permission only.
/archives//html/TenTec/2001-11/msg00300.html (8,771 bytes)

350. Re: [TenTec] Jupiter Current Draw / Digital Modes (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Mon, 08 Oct 2001 13:05:48 -0500
Voice NEVER draws as much average current as a continuous tone. Its the NATURE of SSB. ALl there is from SSB is AUDIO. "Weak audio?" Compared to WHAT? There's no carrier to compare to. Its NOT AM whe
/archives//html/TenTec/2001-10/msg00053.html (8,220 bytes)

351. Re: [TenTec] Noisy Corsair II (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Mon, 15 Oct 2001 10:19:35 -0500
On my C II, the antenna noise on all bands is far above the receiver noise threshold (and the front end noise is really low with the circuits it uses). Maybe your high noise comes from a faulty resis
/archives//html/TenTec/2001-10/msg00108.html (7,164 bytes)

352. Re: [TenTec] Need Corsair II audio help (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Sat, 15 Sep 2001 21:54:37 -0500
If the S-meter is moving, then the IF stages and detector are working. The failure has to be in the audio. Could be most any audio stage, including notch filter, peaking filter, bad switch on the spe
/archives//html/TenTec/2001-09/msg00143.html (7,330 bytes)

353. Re: [TenTec] Fw: Loud Hum w/Paragon I & 961 (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Sun, 16 Sep 2001 14:30:12 -0500
You might try lowering the line voltage to the power supply. Hum is a sign of the core being run to saturation (cheap design short on core area and copper). It should get very much quieter with only
/archives//html/TenTec/2001-09/msg00147.html (8,282 bytes)

354. Re: [TenTec] Omni V Freq. Display and Noise Blanker (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Thu, 20 Sep 2001 10:56:07 -0500
Each band is set with a crystal and is independently adjustable. That gives the radio far less phase noise than it would have if all the offset frequencies were synthesized. Be sure to use a counter
/archives//html/TenTec/2001-09/msg00163.html (7,520 bytes)

355. Re: [TenTec] Heath keyer questions (re: TT rigs) (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Mon, 24 Sep 2001 09:16:41 -0500
To move the paddles closer together you might be able mount one or both on the inside of its arm. If its transistor output and set for negative keying, and the Delta is positive, the quickest mod mig
/archives//html/TenTec/2001-09/msg00179.html (7,433 bytes)

356. Re: [TenTec] Omni-D Dial sticking? (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Tue, 25 Sep 2001 02:32:24 -0500
WD-40 may be not the worst thing for loosening up the hardened grease, if its in the vernier, but you won't be able to spray enough from the front to loosen the grip of the slug's nut on the threads.
/archives//html/TenTec/2001-09/msg00190.html (7,764 bytes)

357. Re: [TenTec] TT boxes (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Fri, 28 Sep 2001 09:43:23 -0500
Tentec sells boxes. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson. Reproduction by permission only.
/archives//html/TenTec/2001-09/msg00241.html (6,873 bytes)

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