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41. Re: [TenTec] RF Ground (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sun, 05 Apr 2009 21:29:09 -0600
If you really want lightning and RF grounding, those ground sources need to be connected together with wide copper strap. 18" is a nice width. Otherwise the inductance is too much to be totally effec
/archives//html/TenTec/2009-04/msg00109.html (9,585 bytes)

42. Re: [TenTec] RF Ground (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Mon, 06 Apr 2009 10:42:39 -0600
I prefer to isolate the tower from the house wiring during thunderstorms. When lightning hits with a few kilo amps and the house wiring is 12 gauge, even a small fraction of those few kilo amps wipes
/archives//html/TenTec/2009-04/msg00123.html (10,353 bytes)

43. Re: [TenTec] Omni VI / + (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Mon, 06 Apr 2009 10:46:33 -0600
There is probably a short spike on those leading edges. The time delay of the crystal filters after the gain controlled stages accompanied by the half cycle at audio delay for audio derived AGC lets
/archives//html/TenTec/2009-04/msg00124.html (10,858 bytes)

44. Re: [TenTec] RF Ground (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Mon, 06 Apr 2009 10:49:11 -0600
Rural repeater and cell phone sites spend the money for a band of 18" surrounding the building and believe (based on years of survival on Iowa prairies) its worth the price. All cables through the wa
/archives//html/TenTec/2009-04/msg00125.html (9,507 bytes)

45. Re: [TenTec] RF Ground (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 08 Apr 2009 17:24:19 -0600
And make those disconnects give at least a couple feet of air gap EVERY TIME. My shack has been damaged twice when the gap was small. A switch won't cut it, unless its made to hold off more than 100
/archives//html/TenTec/2009-04/msg00166.html (10,776 bytes)

46. Re: [TenTec] Digital Modes (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sun, 19 Apr 2009 09:58:34 -0600
WEFAX is AFSK on FM, wider FM than your ham receiver will accept. There is probably software using a sound card for some OS. Receive only needs little of an interface because ground loops at speaker
/archives//html/TenTec/2009-04/msg00247.html (11,358 bytes)

47. Re: [TenTec] Aux I/O connection (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sun, 19 Apr 2009 19:24:40 -0600
Except that some with dilusions of broadcast voice grandure transmit 6 KHz or more of audio bandwidth. 73, Jerry, K0CQ
/archives//html/TenTec/2009-04/msg00257.html (9,681 bytes)

48. Re: [TenTec] Aux I/O connection (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sun, 19 Apr 2009 19:57:52 -0600
That's 6 KHz of audio bandwidth on SSB. They accomplish little but splatter and transmitting the noise of their dog barking and the fans on their computer in most of that bandwidth. Hollingsworth was
/archives//html/TenTec/2009-04/msg00259.html (12,490 bytes)

49. Re: [TenTec] DDS VFO as remote VFO? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 21 Apr 2009 10:57:11 -0600
Have you checked to see that all the temperature compensation capacitors are soldered to the PC board? I found that to be a problem in a Kenwood that drifted too much. Looking at the PTO schematic fo
/archives//html/TenTec/2009-04/msg00275.html (8,909 bytes)

50. Re: [TenTec] Triton PTO kit same as Corsair II? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 22 Apr 2009 03:39:38 -0600
And since the threaded shaft and pistol are not part of the rebuilding kit, it doesn't matter which hand the thread is if all the other parts are the same. I just checked my kit and those two parts a
/archives//html/TenTec/2009-04/msg00292.html (10,088 bytes)

51. Re: [TenTec] Omni VI, Opt 3: Strange Tuning Behavior (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 22 Apr 2009 03:41:56 -0600
The shaft encoder does a fixed number of steps per revolution. To tune fast the size of the synthesizer steps must increase. So with fast tuning you find 100 Hz or larger steps. Way back, some synthe
/archives//html/TenTec/2009-04/msg00293.html (8,751 bytes)

52. Re: [TenTec] DDS VFO as remote VFO? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 22 Apr 2009 08:31:18 -0600
NPO caps are not an adequate substitution for N750 caps. NPO are a little unpredictable which way they move, but inductors and cores tend to need a true bit of negative temperature compensation. 73,
/archives//html/TenTec/2009-04/msg00298.html (8,856 bytes)

53. Re: [TenTec] Triton PTO kit same as Corsair II? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 22 Apr 2009 09:44:53 -0600
My Corsair II kit has no threaded shaft or pistol. It does have the inner shaft that was severely worn. The parts list with it mentions the threaded shaft but its not in the parts list. 73, Jerry, K0
/archives//html/TenTec/2009-04/msg00302.html (9,493 bytes)

54. Re: [TenTec] Triton PTO kit same as Corsair II? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 22 Apr 2009 13:17:03 -0600
Likely you ordered the 90202 with the kits, that part didn't come with the kits. Its called pistola because its shaped like a pistola. 73, Jerry, K0CQ
/archives//html/TenTec/2009-04/msg00312.html (9,250 bytes)

55. Re: [TenTec] OT: cleaners, etc (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 29 Apr 2009 18:03:54 -0600
AlnoOx aluminum wire connection grease at the connections and junctions. Gerald J.
/archives//html/TenTec/2009-04/msg00371.html (8,417 bytes)

56. Re: [TenTec] OT: cleaners, etc (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 30 Apr 2009 00:07:41 -0600
The NoAlox grease has two functions. First the grease keeps the aluminum from oxidizing more, but also its filled with crystalline zinc particles that when pressure is applied break through the alumi
/archives//html/TenTec/2009-04/msg00377.html (9,828 bytes)

57. Re: [TenTec] OT: cleaners, etc (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 30 Apr 2009 00:35:51 -0600
But not the ones with plated steel parts. They rust too much. 100% stainless steel hose clamps do exist. McMaster-Carr and Heartland AgriSupply are two sources that I know of. Gerald J.
/archives//html/TenTec/2009-04/msg00379.html (8,966 bytes)

58. Re: [TenTec] New Firmware (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Mon, 02 Mar 2009 11:00:23 -0600
The vintage Collins S-Line that set quality standards long ago, rolled off at 300 and 2400 Hz. 2.1KHz filter bandwidth. 73, Jerry, K0CQ
/archives//html/TenTec/2009-03/msg00069.html (9,756 bytes)

59. Re: [TenTec] Red Screen (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 04 Mar 2009 20:05:41 -0600
Maybe that's a "feature." Showing you that the receiver has received a signal strong enough to be hazardous to the hardware. 73, Jerry, K0CQ
/archives//html/TenTec/2009-03/msg00159.html (8,426 bytes)

60. Re: [TenTec] Omni VI qustion...Notch Filter (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 06 Mar 2009 20:04:16 -0600
No automatic notch filter can tell the difference between the CW you want to copy and QRM. They are all tones. Manual you have to tune something to put the notch on ONE QRM tone, I'm sure. At least t
/archives//html/TenTec/2009-03/msg00173.html (8,303 bytes)

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