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Total 433 documents matching your query.

41. Re: [Amps] Help with QRO ham's web page (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Tue, 20 Jan 2015 23:28:14 -0800
-- ORIGINAL MESSAGE --(may be snipped) REPLY: Is this the one? http://www.qrotec.com/ Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.com http://lists.con
/archives//html/Amps/2015-01/msg00189.html (6,971 bytes)

42. Re: [Amps] amp reading (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Fri, 23 Jan 2015 15:37:25 -0800
-- ORIGINAL MESSAGE --(may be snipped) the filament lead since it seems it is going to have to be about 0.2/0.4 ohms or so at high current. Maybe a wire but that can add inductance so I was never cle
/archives//html/Amps/2015-01/msg00220.html (7,130 bytes)

43. Re: [Amps] 5 Minutes for Ameritron 811H to warm up? (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Fri, 23 Jan 2015 18:06:45 -0800
-- ORIGINAL MESSAGE --(may be snipped) REPLY: It bothers me to see hams wasting their time and money on tubes made of glass. This is an obsolete technology which is of historical interest but really
/archives//html/Amps/2015-01/msg00226.html (9,928 bytes)

44. Re: [Amps] 5 Minutes for Ameritron 811H to warm up? (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Sat, 24 Jan 2015 01:47:42 -0800
-- ORIGINAL MESSAGE --(may be snipped) REPLY: Actually, there is a fundamental difference. Glass is a supercooled non-crystalline liquid, whereas ceramic has a rigid crystalline or partly crystalline
/archives//html/Amps/2015-01/msg00234.html (9,582 bytes)

45. Re: [Amps] 5 Minutes for Ameritron 811H to warm up? (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Sat, 24 Jan 2015 01:53:45 -0800
-- ORIGINAL MESSAGE --(may be snipped) REPLY: Actually, there is something wrong with that. Glass, technically, is a liquid and flows very slowly under pressure, even at room temperature over long pe
/archives//html/Amps/2015-01/msg00235.html (9,320 bytes)

46. Re: [Amps] 5 Minutes for Ameritron 811H to warm up? (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Sat, 24 Jan 2015 02:03:04 -0800
-- ORIGINAL MESSAGE --(may be snipped) REPLY: All the currently manufactured high-end amps I am aware of use ceramic tubes (or transistors). Also food for thought. I will grant you the 3-500Z family
/archives//html/Amps/2015-01/msg00236.html (9,033 bytes)

47. Re: [Amps] Biasing a Class C modulated final (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Tue, 17 Feb 2015 21:46:41 -0800
-- ORIGINAL MESSAGE --(may be snipped) REPLY: A clamp device is a good idea but it doesn't have to be a tube. High power, high voltage transistors are available dirt cheap anymore. It will take a lit
/archives//html/Amps/2015-02/msg00105.html (7,769 bytes)

48. Re: [Amps] Biasing a Class C modulated final (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Wed, 18 Feb 2015 10:40:42 -0800
-- ORIGINAL MESSAGE --(may be snipped) REPLY: Don't forget the other function of a clamp tube or transistor: To protect the tube if the fixed bias itself is lost. Of course this does not apply to cat
/archives//html/Amps/2015-02/msg00110.html (8,192 bytes)

49. Re: [Amps] more - oil bath GS-35b (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Tue, 31 Mar 2015 19:49:59 -0700
-- ORIGINAL MESSAGE --(may be snipped) REPLY: "But not so for the radiator."? There seems to be something wrong with the logic here. Heat transfer doesn't care whether it goes from the tube to the oi
/archives//html/Amps/2015-04/msg00003.html (8,384 bytes)

50. Re: [Amps] silver mica source (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Wed, 1 Apr 2015 08:34:22 -0700
One needs to be very careful about silver mica caps, especially at high power levels. Their voltage and current capacity varies all over the map. Pay special attention to current vs frequency. A good
/archives//html/Amps/2015-04/msg00005.html (7,376 bytes)

51. Re: [Amps] more - oil bath GS-35b (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Wed, 1 Apr 2015 12:07:42 -0700
-- ORIGINAL MESSAGE --(may be snipped) REPLY: You said it better than I did. Sounds right to me. 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.com h
/archives//html/Amps/2015-04/msg00012.html (8,562 bytes)

52. Re: [Amps] Time for New Power Meter (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Mon, 20 Apr 2015 19:09:23 -0500
-- ORIGINAL MESSAGE --(may be snipped) REPLY: If you would consider one that displays on your computer screen and doesn't take up much space minimized, consider the Wavenode. I've had one for a coupl
/archives//html/Amps/2015-04/msg00146.html (8,597 bytes)

53. Re: [Amps] Considering an ALS-1306 (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Fri, 24 Apr 2015 16:22:08 -0700
-- ORIGINAL MESSAGE --(may be snipped) REPLY: Did Ameritron ever state the duty cycle limit for the 1306? I phoned them on the 1300 and they told me 600 watts for RTTY or other full carrier modes. 73
/archives//html/Amps/2015-04/msg00157.html (7,919 bytes)

54. Re: [Amps] Considering an ALS-1306 (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Fri, 24 Apr 2015 21:56:58 -0700
What SHOULD happen is that manufacturers would specify duty cycle at a number of power levels, such as: 500w = 100% 1000w = 90% 1500w = 80% or whatever it is. 73, Bill W6WRT _________________________
/archives//html/Amps/2015-04/msg00164.html (8,214 bytes)

55. Re: [Amps] Time for New Power Meter (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Sat, 2 May 2015 09:46:38 -0700
-- ORIGINAL MESSAGE --(may be snipped) REPLY: There is a way, but it is a bit of work. If you are really serious about it, you can measure the heat rise in a dummy load using first RF and again using
/archives//html/Amps/2015-05/msg00014.html (8,367 bytes)

56. Re: [Amps] Time for New Power Meter (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Sat, 2 May 2015 21:40:44 -0700
-- ORIGINAL MESSAGE --(may be snipped) REPLY: Rarely does Roger even need correcting, but this is one of those times. The 125 watt figure is applicable only at full scale, not part scale. Assuming th
/archives//html/Amps/2015-05/msg00019.html (8,568 bytes)

57. Re: [Amps] Time for New Power Meter (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Sun, 3 May 2015 15:35:59 -0700
-- ORIGINAL MESSAGE --(may be snipped) REPLY: Total nonsense. Manufacture re specify "full scale accuracy" only because they do not guarantee linearity and accuracy below full scale. In other words,
/archives//html/Amps/2015-05/msg00031.html (9,487 bytes)

58. Re: [Amps] Time for New Power Meter (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Sun, 3 May 2015 21:37:50 -0700
-- ORIGINAL MESSAGE --(may be snipped) REPLY: That's not the way I read it. What the above means is that the full scale power reading (in this case 2500 watts) will be accurate within 5%. DO NOT READ
/archives//html/Amps/2015-05/msg00039.html (9,817 bytes)

59. Re: [Amps] Time for New Power Meter (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Sun, 3 May 2015 21:38:01 -0700
-- ORIGINAL MESSAGE --(may be snipped) REPLY: Perfectly stated. Thank you, Alek. 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.com http://lists.cont
/archives//html/Amps/2015-05/msg00040.html (10,267 bytes)

60. Re: [Amps] Time for New Power Meter (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Sun, 3 May 2015 23:53:31 -0700
-- ORIGINAL MESSAGE --(may be snipped) REPLY: That method will work but for our purposes it's probably overkill. An easier and quicker way is to measure the hear rise with the unknown RF and again wi
/archives//html/Amps/2015-05/msg00046.html (10,509 bytes)

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