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Total 97 documents matching your query.

61. Re: [Amps] AC wiring (score: 1)
Author: jsb@digistar.com
Date: Wed, 19 Oct 2005 09:50:05 -0400 (EDT)
I've got a 1500W space heater but I run it on the lower power setting (900W) because i'm afraid the 1500W setting would burn the house down as it is fed with #14 on a 15A circuit. Seems like even 12
/archives//html/Amps/2005-10/msg00456.html (9,087 bytes)

62. Re: [Amps] AC wiring (score: 1)
Author: Jason Buchanan <jsb@digistar.com>
Date: Wed, 19 Oct 2005 21:39:19 -0400
That's the kind of operation I run half the time i'm on the air, using an AOR 9800 on 20 meters for a number of minutes at a time depending on how talkative I am. The rest of the time i'm operating C
/archives//html/Amps/2005-10/msg00478.html (8,359 bytes)

63. Re: [Amps] AC wiring (score: 1)
Author: Jason Buchanan <jsb@digistar.com>
Date: Fri, 21 Oct 2005 16:21:47 -0400
well, it's the 100' run back to the breaker that has me cautious, not the cord on the heater... but it does ok at 900W. 1500W would be better in terms of heating up quicker but I just add another 10
/archives//html/Amps/2005-10/msg00520.html (9,516 bytes)

64. Re: [Amps] 3-500z (score: 1)
Author: Jason Buchanan <jsb@digistar.com>
Date: Tue, 25 Oct 2005 21:32:24 -0400
If it's gonna go, it's gonna go with or without a variac. If you have any grid current when you turn the amp on, immediately shut'r down and yank the tube. If you have some kind of step start for the
/archives//html/Amps/2005-10/msg00583.html (7,658 bytes)

65. Re: [Amps] 3-500z (score: 1)
Author: "Jason Buchanan" <jsb@digistar.com>
Date: Wed, 26 Oct 2005 05:21:18 -0400
Ye cats - 1KW from a single 3-500Z? _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2005-10/msg00585.html (7,862 bytes)

66. Re: [Amps] 3-500z (score: 1)
Author: jsb@digistar.com
Date: Wed, 26 Oct 2005 16:12:35 -0400 (EDT)
umph - well if the typical off-the-shelf AL-80B sits idle at 2900v to the plate (I do not know if this is its normal operating voltage), 1600w input would seem to be a lot of plate current for 1 tube
/archives//html/Amps/2005-10/msg00604.html (9,192 bytes)

67. Re: [Amps] 3-500z (score: 1)
Author: jsb@digistar.com
Date: Wed, 26 Oct 2005 16:19:05 -0400 (EDT)
Dang - must be long grain graphite in those tubes. I get about 1100W PEP steady carrier with my L4, albeit with 3-400Z tubes that are nearly 40 years old, envelope glass browned with use. 73 Jason N1
/archives//html/Amps/2005-10/msg00605.html (8,817 bytes)

68. Re: [Amps] 3-500z (score: 1)
Author: jsb@digistar.com
Date: Wed, 26 Oct 2005 16:21:18 -0400 (EDT)
curious... what's the grid current at that amount of output power? Those tubes must have some kind of grids! -- 73 Jason N1SU http://n1su.us/ _______________________________________________ Amps mail
/archives//html/Amps/2005-10/msg00606.html (8,259 bytes)

69. Re: [Amps] 3-500z (score: 1)
Author: jsb@digistar.com
Date: Wed, 26 Oct 2005 16:26:17 -0400 (EDT)
The photos i've seen of AL-80Bs have Amperex tubes - I thought Amperex built their tubes using graphite plates that get "sick" with that kind of use. Something about graphite poisoning or deformation
/archives//html/Amps/2005-10/msg00608.html (9,212 bytes)

70. Re: [Amps] 3-500Z and Cooling Requirements (score: 1)
Author: Jason Buchanan <jsb@digistar.com>
Date: Thu, 27 Oct 2005 10:41:50 -0400
I know this won't answer your question directly but noise is a factor of turbulence in less-than-optimal fan design. I've found that you can cheat by getting a high output fan (big) and reduce its sp
/archives//html/Amps/2005-10/msg00623.html (7,441 bytes)

71. Re: [Amps] Mobile high power (score: 1)
Author: Jason Buchanan <jsb@digistar.com>
Date: Thu, 27 Oct 2005 14:58:37 -0400
Anyone have any spec sheets that show what the minimum safe distance for operating HF at a given power level? Say, "X" feet at 1000 watts for a particular frequency? 73 Jason N1SU ___________________
/archives//html/Amps/2005-10/msg00636.html (8,764 bytes)

72. Re: [Amps] Drake L-4B PSU burned resistor (score: 1)
Author: Jason Buchanan <jsb@digistar.com>
Date: Sun, 06 Nov 2005 09:56:36 -0500
That happened to me last year - caused by a bad tube. I sent the tubes to Rich Measures for his hipot service ;-) One of the tubes had a filament-grid BD potential of around 2000V (it should be 6000V
/archives//html/Amps/2005-11/msg00075.html (9,144 bytes)

73. [Amps] glass chimneys (score: 1)
Author: Jason Buchanan <jsb@digistar.com>
Date: Mon, 07 Nov 2005 01:10:26 -0500
hi, I have a couple glass chimneys with a 2 inch diameter vent hole, 4 inch diameter at the base and stand 4 inches tall. I don't think these are for the 3-400Z as my understanding was that the 3-400
/archives//html/Amps/2005-11/msg00103.html (6,897 bytes)

74. [Amps] L4 power supply problem? (score: 1)
Author: Jason Buchanan <jsb@digistar.com>
Date: Sun, 13 Nov 2005 15:40:56 -0500
hi, I have an L4 with its original power supply. Been working fine for a long time. Today, I turn it on and after a few minutes there is a large pop and blue spark from near the HV interlock, or loca
/archives//html/Amps/2005-11/msg00159.html (7,745 bytes)

75. Re: [Amps] L4 power supply problem? (score: 1)
Author: Jason Buchanan <jsb@digistar.com>
Date: Mon, 14 Nov 2005 06:43:34 -0500
I found the problem - the interlock blade on the underneath side of the RF deck shorted because the interlock rod seems a little short (no pun intended). I had the case on the unit but the rear left
/archives//html/Amps/2005-11/msg00175.html (7,688 bytes)

76. Re: [Amps] 220V wiring: Was Question about safety ground connection (score: 1)
Author: jsb@digistar.com
Date: Wed, 16 Nov 2005 14:28:42 -0500 (EST)
Alphonsus Cassell (Tito Puentes) - "Hot! Hot! Hot!" I'm glad to know that the quadrillions of dollars of real estate in the US is protected by volunteers. My office is about 100 yards from Raytheon H
/archives//html/Amps/2005-11/msg00255.html (10,825 bytes)

77. [Amps] inrush current limiter (score: 1)
Author: "Jason Buchanan" <jsb@digistar.com>
Date: Sun, 20 Nov 2005 11:43:11 -0500
hi all, I'm wanting to replace my inrush limiter for my Drake L4. Just wondering if anyone had any recommendations for a replacement. I've looked at the thermistors with interest. 73 Jason N1SU _____
/archives//html/Amps/2005-11/msg00373.html (6,245 bytes)

78. Re: [Amps] inrush current limiter (score: 1)
Author: "Jason Buchanan" <jsb@digistar.com>
Date: Sun, 20 Nov 2005 15:14:31 -0500
hi, I've got an Ameritron ICP-240 inrush protector for this L4. It works ok, just wondering if there is something better. The only reason I was interested in the thermistors (but definitely not anymo
/archives//html/Amps/2005-11/msg00387.html (7,594 bytes)

79. Re: [Amps] NEC Prophecy (score: 1)
Author: Jason Buchanan <jsb@digistar.com>
Date: Mon, 21 Nov 2005 13:01:42 -0500
Humbug - they've already come by to visit as a result of using 5 instant rebate coupons to replace incandescent bulbs with spiral fluorescent. The link below demonstrates the new wiring to the N1SU s
/archives//html/Amps/2005-11/msg00404.html (7,743 bytes)

80. [Amps] 866 rectifiers (score: 1)
Author: "Jason Buchanan" <jsb@digistar.com>
Date: Sun, 4 Dec 2005 20:51:22 -0500
I know this may sound silly but i'm curious about building a power supply that does nothing except light up 866 rectifiers and/or other gas tube rectifiers. I'm not entirely certain how they work (i.
/archives//html/Amps/2005-12/msg00025.html (6,838 bytes)

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