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41. Re: [Amps] SS amps and auto-tune. Is it even necessary? (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Wed, 7 Dec 2016 17:14:49 +0000 (UTC); everything else thats involved with the SS amp. Yep, that's it in two sentences. That's why I can't get excited about cheap SS finals until I see a complete, commercialized SS amp using them, said am; /archives//html/Amps/2016-12/msg00164.html (7,743 bytes)
42. [Amps] S-units (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Thu, 8 Dec 2016 04:02:18 -0800; Could the modern ham community please stop pretending that 1 S-unit = 6 db? It may have been true decades ago, but it is far from true in the large majority of modem ham transceivers. When I installe; /archives//html/Amps/2016-12/msg00182.html (6,928 bytes)
43. Re: [Amps] the 600 watt amp (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Thu, 8 Dec 2016 04:04:59 -0800; I agree, but then you have to compare pricing with other tube amps in that power range. Where is the solid state amp that matches the AL-811H in $/watt? ______________________________________________; /archives//html/Amps/2016-12/msg00183.html (8,188 bytes)
44. Re: [Amps] Experimenting (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Thu, 8 Dec 2016 04:09:08 -0800; There are plenty of ham experimenters left today, but they are typically focusing on SDR, QRP, digital software, etc. That's where most of the interest and skills lie. When experimenting requires mac; /archives//html/Amps/2016-12/msg00184.html (8,335 bytes)
45. Re: [Amps] the 600 watt amp (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Fri, 9 Dec 2016 18:37:11 +0000 (UTC); It depends what is being considered and discussed. - If the question is, "What amp should I buy?", then yes, you're probably right. - If the question is about what the alternatives are to building a; /archives//html/Amps/2016-12/msg00224.html (8,067 bytes)
46. Re: [Amps] "Conventional" current flow (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Fri, 9 Dec 2016 14:27:17 -0800; Actually, the diagrams I've seen of the earth's magnetic field show the north geographic pole as being near the *South* magnetic pole. So your compass needle has a north pointing north magnetic pole; /archives//html/Amps/2016-12/msg00232.html (8,851 bytes)
47. Re: [Amps] "Conventional" current flow (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Sat, 10 Dec 2016 02:57:51 +0000 (UTC); Typical example: http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/imgmag/mearthbar.gif Cathy Subject: Re: [Amps] "Conventional" current flow To: amps@contesting.com Date: Friday, December 9, 2016,; /archives//html/Amps/2016-12/msg00244.html (10,084 bytes)
48. Re: [Amps] MOSFET amp filtering - was: auto-tune (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Mon, 12 Dec 2016 13:32:16 +0000 (UTC); I hear a lot of recommendations here for antennas that are flat across the band and very close to SWR of 1:1 to keep solid-state amps happy. That is completely unrealistic on the low bands. I have to; /archives//html/Amps/2016-12/msg00296.html (9,579 bytes)
49. Re: [Amps] MOSFET amp filtering - was: auto-tune (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Mon, 12 Dec 2016 21:55:12 +0000 (UTC); inefficient and radiates more at high angles than low. It all depends what you are trying to do. For solid regional coverage, a low dipole gives excellent NVIS coverage. For DX, it is less than idea; /archives//html/Amps/2016-12/msg00325.html (12,335 bytes)
50. Re: [Amps] Vertical Ant & Ground Loss [WAS: MOSFET amp filtering now soil] (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Tue, 13 Dec 2016 16:26:48 +0000 (UTC); I am not the person who wrote the "lousy soil does NOT vary the vertical angle". I'm not sure why my name is included below. 73, Cathy N5WVR Subject: Re: [Amps] Vertical Ant & Ground Loss [WAS: MOSFE; /archives//html/Amps/2016-12/msg00351.html (8,512 bytes)
51. [Amps] Decline of homebrewing? (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Mon, 2 Jan 2017 15:00:33 +0000 (UTC); It's not likely that the homebrew side will ever be squeezed out. While I am sad that Small Wonder Labs disappeared, Elecraft is going strong, HFPacker amplifier kits up to 100 watts are available, Q; /archives//html/Amps/2017-01/msg00018.html (10,710 bytes)
52. Re: [Amps] Decline of homebrewing? (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Tue, 3 Jan 2017 14:17:30 +0000 (UTC); "All this demonstrates is that there are two ham radios..." There are at least two ham radios, and probably more. Even among builders, the one that involves restoring boat-anchor gear doesn't have mu; /archives//html/Amps/2017-01/msg00034.html (10,050 bytes)
53. Re: [Amps] FCC Denies Expert Linears' Request for Waiver of 15 dB Rule (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Wed, 4 Jan 2017 19:02:04 +0000 (UTC); Well, to be fair, we don't have any choice given the options available from the manufacturers. (I'm ignoring homebrew for purposes of discussion.) I have seen many, many online posts asking for an al; /archives//html/Amps/2017-01/msg00056.html (9,376 bytes)
54. Re: [Amps] VHF all-mode and DC-to-daylight rigs (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Wed, 4 Jan 2017 20:27:34 +0000 (UTC); It sounds like two contradictory things are being said (though not by the same person). Must "DC to daylight in all modes...sacrifice performance as much as they have to in order to meet a pre-deter; /archives//html/Amps/2017-01/msg00060.html (8,296 bytes)
55. Re: [Amps] VHF radios (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Wed, 4 Jan 2017 17:57:22 -0800; My IC-821H has a 1.5 dB noise figure. Where's the modern radio (not preamp) to match that? 73, Cathy N5WVR _______________________________________________ Amps mailing list Amps@contesting.com http:/; /archives//html/Amps/2017-01/msg00069.html (8,296 bytes)
56. Re: [Amps] VHF all-mode and DC-to-daylight rigs (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Wed, 4 Jan 2017 19:06:26 -0800; That Flex 6300 is not in my price range, sorry. And for a long time that kept SDR in a niche. But it's exciting to see affordable radios like the RTL-SDR and AirSpy that can bring the benefits to eve; /archives//html/Amps/2017-01/msg00072.html (7,729 bytes)
57. Re: [Amps] Decline of homebrewing? (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Thu, 5 Jan 2017 16:16:45 +0000 (UTC); I agree. You need either SSB or PSK. And a PSK QRP project could be simple, inexpensive, and easily taken to the field. But the PSK coding/ decoding would need to be built into firmware programmable; /archives//html/Amps/2017-01/msg00087.html (12,890 bytes)
58. Re: [Amps] VHF all-mode and DC-to-daylight rigs (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Thu, 5 Jan 2017 19:19:34 +0000 (UTC); This is a good point. I don't do satellites; I use these radios for weak-signal VHF terrestrial via tropo propagation. Everyone I know who is active on VHF/UHF non-FM is either doing tropo or meteor; /archives//html/Amps/2017-01/msg00095.html (9,162 bytes)
59. Re: [Amps] Decline of homebrewing? (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Thu, 5 Jan 2017 21:05:43 +0000 (UTC); 73, Cathy N5WVR _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2017-01/msg00105.html (9,144 bytes)
60. Re: [Amps] VHF all-mode and DC-to-daylight rigs (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Thu, 5 Jan 2017 21:40:34 +0000 (UTC); That's a great idea, Joe. I wonder why no manufacturer has done it? Seems like a pretty straightforward project. Take an auto-tune amp, put it in a weatherproof case, run 240V power to the antenna ba; /archives//html/Amps/2017-01/msg00108.html (9,106 bytes)

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