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21. Re: [TenTec] OT: Phonetics (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sun, 17 May 2009 14:39:54 -0600
Or the standard DX contest report, "59 but please repeat your information." Which means the signal report is stuck at 59 or 599 no matter what the true condition of the received signal. 73, Jerry, K0
/archives//html/TenTec/2009-05/msg00161.html (9,580 bytes)

22. Re: [TenTec] Help me, I'm dumb. (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 19 May 2009 09:06:23 -0600
There has nearly always been serial to parallel converters. Both work in 1 byte chunks because RS-232 serial is usually asynchronous and has 3 handshakes for hardware handshaking. The vintage paralle
/archives//html/TenTec/2009-05/msg00217.html (11,297 bytes)

23. Re: [TenTec] Help me, I'm dumb. (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 19 May 2009 10:38:52 -0600
WS 4.0 works well in DOS, windoze, and OS/2. Later versions corrupt the document files way too much, but in non document mode its great for producing C source code. All my computer keyboards have CTR
/archives//html/TenTec/2009-05/msg00221.html (11,508 bytes)

24. Re: [TenTec] TT and the rest of us... (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 20 May 2009 08:51:05 -0600
Not really. That condition is the one with the highest impedance transformation which is not necessarily the condition for a match. The impedance ratio is proportional to the ratio of the capacitor v
/archives//html/TenTec/2009-05/msg00245.html (10,762 bytes)

25. Re: [TenTec] Help me, I'm dumb. (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 20 May 2009 13:49:19 -0600
I don't run windoze for any work tasks, so winvi and I would not be a benefit if even I found it capable which I haven't. I have looked at many linux emulated WS. None do so basic things that WS does
/archives//html/TenTec/2009-05/msg00248.html (12,071 bytes)

26. Re: [TenTec] Help me, I'm dumb. (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 20 May 2009 18:41:39 -0600
That's one of the problems with Linux distributions and software. Each piece is dependent on 1 to 27 other pieces that have to be loaded first and they all have to be the right versions. We cussed wi
/archives//html/TenTec/2009-05/msg00253.html (10,773 bytes)

27. Re: [TenTec] TT and the rest of us... (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 20 May 2009 19:15:26 -0600
Well, I suppose one could run the input capacitor to minimum and adjust only the output capacitor and the coil to get a match, nearly an L match, But that's only for the case when the load Z is highe
/archives//html/TenTec/2009-05/msg00255.html (12,067 bytes)

28. Re: [TenTec] TT and the rest of us... (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 21 May 2009 10:45:48 -0600
The capacitors being more sensitive is a hint at higher Q and so higher loss. There are frequencies where the un-un would work better turned to raise the impedance. That 4:1 impedance also means the
/archives//html/TenTec/2009-05/msg00272.html (12,885 bytes)

29. Re: [TenTec] Anomalous signal on Omni VI (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 21 May 2009 10:53:33 -0600
Its more complicated. The LO actually is a 5.005 MHz and then there's a crystal at 11 MHz moving it up to 16.005 MHz. But there's also a weak LO signal at 11- 5 MHz = 5.995 MHz. So there are LO compo
/archives//html/TenTec/2009-05/msg00273.html (8,547 bytes)

30. Re: [TenTec] Palstar tuner (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 21 May 2009 10:58:35 -0600
That's the fundamental problem with tuning trough a balun. If the load Z is high the voltage goes high and saturates the core which leads to much loss and heating. If the load Z is very low, the wire
/archives//html/TenTec/2009-05/msg00274.html (10,015 bytes)

31. Re: [TenTec] Palstar tuner (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 21 May 2009 14:45:49 -0600
Nearly aways the balun on a tuner is a voltage balun and it is sensitive to applied voltage. Voltage is what saturates the core through the magnetizing inductance. With power applied, a high impedanc
/archives//html/TenTec/2009-05/msg00279.html (9,526 bytes)

32. Re: [TenTec] Palstar tuner (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 21 May 2009 21:34:39 -0600
Yes. Because it has only one possible loaded Q for any given impedance ratio, the circulating current in the circuit is minimized. In a T or PI the loaded Q can be higher resulting in more circulatin
/archives//html/TenTec/2009-05/msg00286.html (9,950 bytes)

33. Re: [TenTec] Palstar tuner (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 21 May 2009 21:37:17 -0600
The difference between 60% and 95% efficiency won't be detectable at the receiver on HF, that's less than half an S-unit. But it will be most noticeable in the temperature rise of the tuner, primaril
/archives//html/TenTec/2009-05/msg00287.html (9,753 bytes)

34. Re: [TenTec] Palstar tuner (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 21 May 2009 21:43:02 -0600
Its not so much the added parts, because capacitors have very low losses, its the increased coil current caused by the higher loaded Q of the pi and T over the L that makes the loss greater. And that
/archives//html/TenTec/2009-05/msg00288.html (9,369 bytes)

35. Re: [TenTec] Need advice about OVP for 262G (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 01 Apr 2009 10:15:11 -0600
The problems with the big zener on the output are that they don't have zero impedance once they are drawing current. So if the available current is big, the voltage drop is big. Then they achieve dis
/archives//html/TenTec/2009-04/msg00005.html (9,986 bytes)

36. Re: [TenTec] Need advice about OVP for 262G (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 01 Apr 2009 10:18:27 -0600
Nominal at a particular current. Higher current from the supply the voltage is higher, maybe a lot higher. Until you get to the super fast silver element fuses, a fast blow fuse is just a good indica
/archives//html/TenTec/2009-04/msg00006.html (9,281 bytes)

37. Re: [TenTec] Need advice about OVP for 262G (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 01 Apr 2009 13:19:11 -0600
Yes the handbook circuit is more complex and more expensive (at least ten cents for the added transistor) but I think the capacitor there helps keep down transient and RF triggered nuisance trips 73,
/archives//html/TenTec/2009-04/msg00008.html (9,184 bytes)

38. Re: [TenTec] Corsair II buzz (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 02 Apr 2009 10:42:00 -0600
As a buzz, its not a sinewave but something sawtooth or square with lots of harmonics? The only part of the radio that does that is the display board (and keyer). And that board is known to fail to w
/archives//html/TenTec/2009-04/msg00025.html (9,763 bytes)

39. Re: [TenTec] Orion II, RX Antennas and use of AGC/RF Gain.... (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sun, 05 Apr 2009 11:15:00 -0600
We turn those knobs constantly even on the same antenna. Noise varies all the time on the same antenna. Or we back off the RF gain and hear only the strong signals and so work only the strong signals
/archives//html/TenTec/2009-04/msg00089.html (9,499 bytes)

40. Re: [TenTec] Omni VI / + (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sun, 05 Apr 2009 21:26:43 -0600
Hi-Fi headphones are even worse because they often have wider responses than ordinary Hi fi speakers. Especially lows that expose the rumbles of IC-746 in the presence of nearby SSB signals. There wa
/archives//html/TenTec/2009-04/msg00108.html (10,266 bytes)

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