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References: [ +from:catherine.james@att.net: 130 ]

Total 130 documents matching your query.

61. Re: [Amps] EME vs. satellite comms (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Fri, 6 Jan 2017 22:06:44 +0000 (UTC)
Gerald, Moonbounce is almost useless for serious communications. When was the last time that had a meaningful rag chew via the Moon? It's especially useless for ragchew if you are limited to running
/archives//html/Amps/2017-01/msg00137.html (8,034 bytes)

62. Re: [Amps] Decline of homebrewing? (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Sat, 7 Jan 2017 14:47:38 +0000 (UTC)
I agree with most of this, Jim, and you've captured what I was thinking when I wrote about my own "new ham who wants to build a legal-limit linear" concerns. The only rule I'd disagree with is #1. No
/archives//html/Amps/2017-01/msg00143.html (9,724 bytes)

63. [Amps] Glow, gettering, and voltage (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Sat, 7 Jan 2017 09:01:08 -0800
I've noticed an interesting effect with the 3-500Z tubes in my SB-220. When I run a kilowatt SSB on the low voltage setting on low HF bands, there is very little glow. When I run the same power on th
/archives//html/Amps/2017-01/msg00152.html (7,308 bytes)

64. Re: [Amps] Glow, gettering, and voltage (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Sat, 7 Jan 2017 19:07:26 -0800
Thanks, all. It had not occurred to me that it is simply due to higher bias current at the higher plate voltage. 73, Cathy _______________________________________________ Amps mailing list Amps@conte
/archives//html/Amps/2017-01/msg00159.html (6,934 bytes)

65. Re: [Amps] Glow, gettering, and voltage (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Sun, 8 Jan 2017 08:46:28 -0800
I tuned for peak power at the higher voltage, advanced the load control a bit more, and operated there. I do not want to wear out the unobtainium CW/SSB switch by going back and forth every time I us
/archives//html/Amps/2017-01/msg00183.html (8,053 bytes)

66. Re: [Amps] PowerGenius XL - Others (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Sat, 11 Feb 2017 22:15:59 +0000 (UTC)
Expected price? I will be surprised if the price of the new Acom 1200s is comparable to the price of a new AL-80B, but maybe so. -- On Sat, 2/11/17, BJ <fxb1982@hotmail.com> wrote: Acom has a 1200s c
/archives//html/Amps/2017-02/msg00061.html (8,351 bytes)

67. Re: [Amps] The option of power (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Sat, 11 Feb 2017 22:21:14 +0000 (UTC)
Sad but true. It's a heck of a lot more relaxing to talk to someone running at least 500 watts on the other end. The bands have also been going long very early in the evening this winter, and QSB has
/archives//html/Amps/2017-02/msg00062.html (7,956 bytes)

68. Re: [Amps] Power thread (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Sun, 12 Feb 2017 15:16:03 +0000 (UTC)
other guy's noise. Even the guys with the biggest amps running a "California kilowatt" and the biggest towers cannot communicate anywhere in the world under any propagation conditions. There is alway
/archives//html/Amps/2017-02/msg00073.html (8,626 bytes)

69. Re: [Amps] Maintenance-free (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Mon, 27 Feb 2017 14:05:20 +0000 (UTC)
A lot of this comes down to increasing technological complexity. As a teen-ager and early-twenty-something, I changed the oil in my car. It was easy. You either popped the hood or crawled under the c
/archives//html/Amps/2017-02/msg00210.html (8,409 bytes)

70. Re: [Amps] Shipping Costs (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Wed, 1 Mar 2017 14:03:58 +0000 (UTC)
Many years ago, I sold a pair of Drake twins, T4B/R4B. They were not mine, but were loaned to me to use with the understanding that when I was ready to move on, I would sell them and send the money t
/archives//html/Amps/2017-03/msg00003.html (8,808 bytes)

71. Re: [Amps] SS amps watercooling (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Mon, 6 Mar 2017 14:44:51 +0000 (UTC)
I would say the consensus is that air cooling is much simpler than liquid cooling, even if large, noisy fans are needed and the case has to be carefully designed to force flow in the right places. It
/archives//html/Amps/2017-03/msg00043.html (7,680 bytes)

72. Re: [Amps] SS amps watercooling (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Tue, 7 Mar 2017 15:17:03 +0000 (UTC)
That's right. HIgher is alkaline/basic, lower is acid. -- _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2017-03/msg00071.html (8,267 bytes)

73. Re: [Amps] 3rd ed. Eimac's "Care and Feeding of Power Grid Tubes" (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Wed, 8 Mar 2017 00:05:03 +0000 (UTC)
Not bad. That's about $182 in today's dollars, corrected for inflation. Compare with $170 - $200 for new Chinese tubes today. 73, Cathy N5WVR Just got my 1974 buyers guide off the shelf.  It has some
/archives//html/Amps/2017-03/msg00079.html (7,930 bytes)

74. Re: [Amps] 240 Volt Blowers needed (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Tue, 21 Mar 2017 12:30:10 +0000 (UTC)
When I had my 240V / 30A circuit installed for the SB-220, the electrician asked whether I wanted a 3-prong or 4-prong outlet. I chose 4-prong since that seems to be the modern standard. That meant r
/archives//html/Amps/2017-03/msg00126.html (8,948 bytes)

75. Re: [Amps] Labeling house circuits (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Tue, 21 Mar 2017 15:26:58 +0000 (UTC)
Good advice. How have other hams done the labeling? I don't want a sloppy masking tape label, but something permanent and good-looking. Any recommended sources for such good-quality labels that will
/archives//html/Amps/2017-03/msg00128.html (7,437 bytes)

76. Re: [Amps] New Amplifier (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Sun, 9 Apr 2017 20:20:54 +0000 (UTC)
As Jim says, for $7000, it should be capable of 1500 watts RF out for hours with a brick on the key and no damage or shortened lifetime. If it can't do that, why pay so much when there are far cheape
/archives//html/Amps/2017-04/msg00025.html (8,579 bytes)

77. Re: [Amps] New Amplifier (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Mon, 10 Apr 2017 01:54:42 +0000 (UTC)
My SB-220 still has Eimac tubes in it. I suspect they are the 40 year-old originals, though I cannot prove it. Tubes should last a very long time in routine amateur service. It will be interesting t
/archives//html/Amps/2017-04/msg00031.html (9,797 bytes)

78. Re: [Amps] Non-resonant antennas (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Mon, 10 Apr 2017 13:00:47 +0000 (UTC)
On 160 meters, it's not practical for me to have an antenna that is 1.5:1 or better SWR across the band. My inverted-U location cannot support a cage dipole or two dipoles in a fan arrangement. The
/archives//html/Amps/2017-04/msg00042.html (8,430 bytes)

79. Re: [Amps] New Amplifier (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Mon, 10 Apr 2017 16:17:13 +0000 (UTC)
I've lost track of the number of times I've had to replace the IRF510 MOSFETs in my HFPacker 35 watt amp. This is a good little amp, but it eats IRF510 transistors for breakfast. It is Class A, with
/archives//html/Amps/2017-04/msg00052.html (9,150 bytes)

80. Re: [Amps] Tubes, transistors, and 'abuse' (score: 1)
Author: Catherine James <catherine.james@att.net>
Date: Tue, 11 Apr 2017 12:12:46 +0000 (UTC)
Did you miss where I said "When 'pick up the component in your hand' qualifies as 'abuse', you have an issue"? Again, the point is that they require extreme protection. Tubes don't. In my previous e
/archives//html/Amps/2017-04/msg00061.html (7,933 bytes)

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