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1. Re: [TenTec] eagle (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Fri, 01 Apr 2011 09:46:50 -0600
The solid state PA, especially at 12 volts, is very particular about the supply voltage IN the radio. A small drop hurts the power output, so if the power supply regulation isn't perfect, the power l
/archives//html/TenTec/2011-04/msg00008.html (11,118 bytes)

2. Re: [TenTec] eagle (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Fri, 01 Apr 2011 12:33:01 -0600
In the 50s cars left Detroit with speedometers that read 10 mph fast at 60. It was intentional, the makers considered it a safety factor. 73, Jerry, K0CQ you're absolutely right! but... I still paid
/archives//html/TenTec/2011-04/msg00013.html (12,415 bytes)

3. Re: [TenTec] eagle (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Fri, 01 Apr 2011 12:34:55 -0600
Not really a 400% error, more like a 1/2% error based on absolute temperature. 73, Jerry, K0CQ The speedometer in my Rav 4 is off by 2 MPH. The outside temp is off by 2 deg F. No, I haven't taken it
/archives//html/TenTec/2011-04/msg00014.html (8,921 bytes)

4. Re: [TenTec] eagle (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Fri, 01 Apr 2011 18:42:59 -0600
1) Typical meters have up to 10% tolerance - meaning up to 10% +/- accuracy. That makes it almost impossible to know what you have, really. And that's 10% of full scale, not of the reading. Bird slug
/archives//html/TenTec/2011-04/msg00027.html (15,390 bytes)

5. Re: [TenTec] Intermittent Omni VI+ rx problem & optical illusion fixed. (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Fri, 01 Apr 2011 19:08:34 -0600
All the options make front panel design difficult. Push buttons are easier to build than rotary switches to select bands, but some radios like the Omni VI and the Yaesu FT-1000 have a mere 90 to 110
/archives//html/TenTec/2011-04/msg00030.html (11,186 bytes)

6. Re: [TenTec] eagle (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Fri, 01 Apr 2011 20:38:20 -0600
GPS with RTK like farmers use is quite accurate taking out the variability of short term propagation and the randomness built into the GPS system. Raw GPS varies the position while still and changes
/archives//html/TenTec/2011-04/msg00035.html (11,665 bytes)

7. Re: [TenTec] Intermittent Omni VI+ rx problem & optical illusion fixed. (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sat, 02 Apr 2011 00:02:43 -0600
I think Gerry makes good points about the number of buttons and the interplay between buttons and menu items. I do like the fact that I can do many things in BOTH the menu and on the front panel. I a
/archives//html/TenTec/2011-04/msg00040.html (10,368 bytes)

8. Re: [TenTec] Eagle -- power measurement (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sat, 02 Apr 2011 10:54:45 -0600
While a 6AL5 and transformer could be cheap, the venerable HP 410B and 410C used a smaller diode in the AC probe and they also made a 10:1 voltage divider and a coax tap adapter for this very purpose
/archives//html/TenTec/2011-04/msg00043.html (10,439 bytes)

9. Re: [TenTec] Eagle -- power measurement (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sat, 02 Apr 2011 12:22:34 -0600
An ultra ultra conservative design. For RF, I'd prefer that the leads on the individual resistors was nearly zero. I wrote up such a design for Iowa Army MARS probably three decades ago. The wire lea
/archives//html/TenTec/2011-04/msg00045.html (13,853 bytes)

10. Re: [TenTec] eagle (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sat, 02 Apr 2011 18:33:35 -0600
That's fine formula for gain and loss based on power ratios, but not a great benefit in figuring power to a dummy load with a voltmeter. And what you use as a indicator for the dummy load affects the
/archives//html/TenTec/2011-04/msg00049.html (11,564 bytes)

11. Re: [TenTec] eagle (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sat, 02 Apr 2011 18:40:17 -0600
As I've said before and not long ago, a 12 volt PA is very sensitive to supply voltage and that affects its power output considerably. Even a tenth of a volt will change the power significantly becau
/archives//html/TenTec/2011-04/msg00050.html (10,346 bytes)

12. Re: [TenTec] Intermittent Omni VI+ rx problem & optical illusion fixed. (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sun, 03 Apr 2011 10:45:52 -0500
Yes the menus can be more than a bother. I have two FT857D, the compact batteryless 897. In 55+ years of using CW, I've never learned to use a keyer well enough to use it on the air, but I use a stra
/archives//html/TenTec/2011-04/msg00053.html (12,916 bytes)

13. Re: [TenTec] [Amps] what is a 4 wire 240VAC service? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Mon, 04 Apr 2011 01:08:00 -0500
The big hazard in the 3 wire situation with some load current in the common ground/neutral conductor is that when the ground wire fails, 120 volts WILL be found on the case. I've know that to kill ap
/archives//html/TenTec/2011-04/msg00066.html (10,190 bytes)

14. Re: [TenTec] manual for Mode B sat station (2510) (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 05 Apr 2011 10:40:49 -0500
Last week my search (as I posted last Wednesday) showed http://www.w4qcfmanuals.com/manualsTA-TG.html lists the 2510 for a price. http://ac6v.com/manuals.htm has a long list of manual sources, free a
/archives//html/TenTec/2011-04/msg00079.html (10,955 bytes)

15. Re: [TenTec] TenTec Transmit Power Inputs (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 05 Apr 2011 10:45:50 -0500
One more crucial detail is power supply voltage. Slightly low voltage can restrict the available power. 73, Jerry, K0CQ TenTec tests the transmit output power on every rig at different test stations.
/archives//html/TenTec/2011-04/msg00080.html (9,704 bytes)

16. Re: [TenTec] manual for Mode B sat station (2510) (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 05 Apr 2011 16:00:46 -0500
That's good news. 73, Jerry, K0CQ
/archives//html/TenTec/2011-04/msg00090.html (9,966 bytes)

17. Re: [TenTec] manual for Mode B sat station (2510) (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 05 Apr 2011 16:17:11 -0500
According to the frequency chart at AMSAT only the spasmodic ancient Oscar 7 has uplink near 432 MHz. And only Oscar 52 (VUSAT) has uplink between 435 and 438 in operational satellites. RS-30 has a b
/archives//html/TenTec/2011-04/msg00091.html (11,629 bytes)

18. Re: [TenTec] Corsair - blank LED segments (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Wed, 06 Apr 2011 16:17:14 -0500
I just checked the Corsair manual. Definitely multiplexed and on two boards so it could be the connection of that segment between the boards, the driver chip, or the counter chip. Page 3-27 in the ma
/archives//html/TenTec/2011-04/msg00104.html (9,977 bytes)

19. Re: [TenTec] Corsair - blank LED segments (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Wed, 06 Apr 2011 16:43:44 -0500
Corsair or Corsair II? Your post says Corsair. There is not much in common between Corsair and Corsair II displays. My post is based on the original Corsair schematics where ALL the digits come from
/archives//html/TenTec/2011-04/msg00109.html (12,317 bytes)

20. Re: [TenTec] Corsair - blank LED segments (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Wed, 06 Apr 2011 18:27:20 -0500
Fortunately for fixing but unfortunately for needing fixing, TenTec cables have been a weak part of the radios for a long time and still are in Orion I and II. Best I can figure from the manual (whic
/archives//html/TenTec/2011-04/msg00114.html (11,191 bytes)

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