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321. Re: [Amps] Subject header (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Sun, 04 Apr 2010 09:55:57 +0100; OK, that's your view. I do not intend doing that. I have been a member for many years. It is not the wishes of one person. I've had a couple of emails from others agreeing with me. Most however have; /archives//html/Amps/2010-04/msg00067.html (8,941 bytes)
322. Re: [Amps] liquid cooling (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Mon, 05 Apr 2010 19:08:39 +0100; It is incorrect to say water is an insulator. No matter how much you distill it, there is a degree of self-ionization. http://en.wikipedia.org/wiki/Self-ionization_of_water which puts an lower limit; /archives//html/Amps/2010-04/msg00110.html (9,941 bytes)
323. Re: [Amps] liquid cooling (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Mon, 05 Apr 2010 23:08:41 +0100; Water is neither a perfect conductor or insulator. Whether it is more like a conductor or insulator depends on the context. Certainly, I think it wrong to state water is an insulator, when its insula; /archives//html/Amps/2010-04/msg00132.html (10,259 bytes)
324. Re: [Amps] A tale of two IMs What happens? (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Thu, 15 Apr 2010 13:13:38 +0100; It is not likely to clean it up, but in theory if the phase relationships were just right, you could completely cancel the products. But doing that at multiple frequencies, for multiple amplitudes is; /archives//html/Amps/2010-04/msg00467.html (11,686 bytes)
325. Re: [Amps] A tale of two IMs What happens? (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Thu, 15 Apr 2010 17:01:21 +0100; You are basically saying what I thought - an exact analysis is non-trivial. You don't surprise me this has been done before, but it needs more than the ability to use logs and add/subtract a few numb; /archives//html/Amps/2010-04/msg00471.html (12,609 bytes)
326. Re: [Amps] A tale of two IMs What happens? (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Sat, 17 Apr 2010 09:52:43 +0100; That's interesting. At first I thought this seemed silly, but then I thought about it, and I believe it may be semi-true in the case of CATV, but not true at all in the case of amateur radio. In the; /archives//html/Amps/2010-04/msg00500.html (13,287 bytes)
327. Re: [Amps] A tale of two IMs What happens? (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Sun, 18 Apr 2010 14:49:07 +0100; There are lots of claims, but I have not seen anybody post anything to substantiate these claims. I think it is a quite complex issue. I suspect an exact analysis is possible, which would put absolut; /archives//html/Amps/2010-04/msg00533.html (10,387 bytes)
328. Re: [Amps] A tale of two IMs What happens? (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Sun, 18 Apr 2010 21:50:31 +0100; I believe analytical techniques could be used to put absolute limits on this. Perhaps if I've got a bit of time, and inclination, I'll have a go at this. It can't be rocket science, though my maths i; /archives//html/Amps/2010-04/msg00546.html (10,386 bytes)
329. Re: [Amps] A tale of two IMs What happens? (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Thu, 22 Apr 2010 11:52:21 +0100; To be more precise it is the *voltages* which add. The voltages must be added as vectors, not scalers, so it is not true to say the powers will add. They could cancel under some highly unlikely set o; /archives//html/Amps/2010-04/msg00605.html (11,818 bytes)
330. Re: [Amps] A tale of two IMs What happens? (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Thu, 22 Apr 2010 16:32:17 +0100; Different fields do tend to use different units. I recall along time ago working somewhere where my manager wanted to know the power consumptions of some computer equipment. I worked it out, and gave; /archives//html/Amps/2010-04/msg00607.html (10,540 bytes)
331. Re: [Amps] What do you think of these HV Connectors (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Sat, 29 May 2010 16:57:02 +0100; I've used SHV in professional applications and found them very good, though the currents in my case where not large. They would be impossible to mate with a normal BNC - something I doubt is true wit; /archives//html/Amps/2010-05/msg00428.html (8,159 bytes)
332. Re: [Amps] Transformer Calcs (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Wed, 09 Jun 2010 17:54:27 +0100; I'm not sure I understand exactly what you know here. Are you saying. Line feed = input to primary. Load feed = output from secondary? Why do you want to know the KVA rating? It looks like you are im; /archives//html/Amps/2010-06/msg00097.html (9,038 bytes)
333. Re: [Amps] Transformer Calcs (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Thu, 10 Jun 2010 19:24:58 +0100; Personally I would have thought just because a transformer is not too hot to touch, it would not be safe to assume it is ok. I've run many transformers up to their maximum ratings and they are nowher; /archives//html/Amps/2010-06/msg00112.html (7,980 bytes)
334. Re: [Amps] 1 db compression point procedure ? (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Thu, 1 Jul 2010 13:41:21 +0100; The gain should first be measured with low-level signals (mW range). Then find where the gain has falled by 1 dB. That probably will give you a figure well below what you want to to use, but that is; /archives//html/Amps/2010-07/msg00003.html (7,975 bytes)
335. Re: [Amps] Fiament watts (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Mon, 30 Aug 2010 20:14:37 +0100; That sounds dubious to me. As soon as a tube start dissipating a kW on the anode, temperature gradients will exist which will be far greater than that caused by the heater warming the whole tube. The; /archives//html/Amps/2010-08/msg00475.html (8,821 bytes)
336. Re: [Amps] SHV connectors great, but where to find coax? (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Sat, 11 Sep 2010 10:40:55 +0100; You don't need anything other than "standard" coax. By that I mean, whatever the manufacturer of the plus says. It'sits RG/59, use that. You need to cut the coax how they say too. I would certainly n; /archives//html/Amps/2010-09/msg00079.html (8,593 bytes)
337. Re: [Amps] SHV connectors great, but where to find coax? (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Sun, 12 Sep 2010 01:20:48 +0100; I've got quite a few. If they fetching enough money I might have put them on eBay, but can't be bothered for $15, though mine are Huber and Suhner, unlike the Kings ones on eBay now. They are a good; /archives//html/Amps/2010-09/msg00094.html (9,488 bytes)
338. Re: [Amps] SHV connectors great, but where to find coax? (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Sun, 12 Sep 2010 01:26:08 +0100; I would not use a dab of silicon grease. Those connectors are well designed. I think if the manufacturer felt they needed grease, they would supply it, just like they do with some other connectors -; /archives//html/Amps/2010-09/msg00095.html (9,329 bytes)
339. Re: [Amps] SHV connectors great, but where to find coax? (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Sun, 12 Sep 2010 10:08:01 +0100; This is the sort of thing I would not trust Wikipedia for! Sorry, but I'd look at the manufacturers data. Here is is is for Huber and Suhner - it is indeed 5 kV DC. http://www.hubersuhner.com/mozilla; /archives//html/Amps/2010-09/msg00107.html (9,453 bytes)
340. Re: [Amps] SHV connectors great, but where to find coax? (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Mon, 13 Sep 2010 13:45:02 +0100; Exactly. I assume none of the people proposing using PL-259 plugs for HV are chartered engineers. The Engineering Council in the UK would I expect strip someone of their CEng status if an individual; /archives//html/Amps/2010-09/msg00138.html (9,620 bytes)

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