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161. Re: [Amps] surge limiter question (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Thu, 04 Aug 2005 21:29:03 +0100
Is a resistor not good enough for you? If the transformer is not huge in comparison to that needed, then it will limit the inrush current. A simple resistor will do a bit more. To do it properly, it
/archives//html/Amps/2005-08/msg00118.html (10,454 bytes)

162. Re: [Amps] Metric system (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Thu, 04 Aug 2005 23:14:40 +0100
I think you are right there. I keep tryin to tell my wife to stop converting. Personally I'd like to see us abandon degrees Celsius too and just use Kelvin, but I don't think that will happen in my l
/archives//html/Amps/2005-08/msg00125.html (10,421 bytes)

163. Re: [Amps] Metric system (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Fri, 05 Aug 2005 07:17:04 +0100
Once I worked somewhere where I was asked to compute the heat dissipated by some computers. I gave an answer is Watts, but was told by my boss he did not want it in Watts. He never stated what units
/archives//html/Amps/2005-08/msg00143.html (10,092 bytes)

164. Re: [Amps] QRO ? (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Fri, 05 Aug 2005 08:18:23 +0100
Many here would say the 4-1000A is not a large tube!! You would need to check the data sheet of a tube before deciding whether it can be used at low voltages or not. Always check the data sheet for t
/archives//html/Amps/2005-08/msg00148.html (8,954 bytes)

165. Re: [Amps] Burning question of the day- how long is it? (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Fri, 05 Aug 2005 08:53:57 +0100
Money would be a lot easier if we ha a 99 pence coin. Buy a TV and it's quite likely to be &pound;49.99 for a cheap model, &pound;499.99 for a decent one, or &pound;1999.99 if you have more money to
/archives//html/Amps/2005-08/msg00149.html (8,029 bytes)

166. Re: [Amps] Wrong Business (score: 1)
Author: "Dr. David Kirkby" <david.kirkby@onetel.net>
Date: Fri, 05 Aug 2005 12:01:42 +0100
This article is what I consider a "clasic" and still have a laugh when I read it. http://www.g8wrb.org/useful-stuff/audiophools.pdf If you take a look at the prices of speaker cables in HiFi magazine
/archives//html/Amps/2005-08/msg00156.html (8,708 bytes)

167. Re: [Amps] audio black magic TSPA (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Fri, 05 Aug 2005 20:21:25 +0100
<snip> But that is most unlikely to happen again. The very valid point made by the author of http://www.g8wrb.org/useful-stuff/audiophools.pdf is that the publishers of audiophool magazines have a co
/archives//html/Amps/2005-08/msg00193.html (9,422 bytes)

168. Re: [Amps] Fraudulent email to amps posters (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Sun, 07 Aug 2005 13:08:28 +0100
Yes, I'm sure a lot (myself included) do. They rely on the 0.001% of people who are either new to the web, or total idiots. I would agree with you there. Most mailing lists (including this one) use M
/archives//html/Amps/2005-08/msg00232.html (10,484 bytes)

169. Re: [Amps] Simple question (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Wed, 10 Aug 2005 02:13:49 +0100
Can I make a simple suggestion - you pick a more appropriate title. Why not "testing filament transformer" or something like that? Then people will not have to read things they know nothing about. Ar
/archives//html/Amps/2005-08/msg00357.html (9,353 bytes)

170. Re: [Amps] Testing filament xfmr (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Wed, 10 Aug 2005 23:17:58 +0100
The classic short circuit test. agreed It's a long time since I did this, but the short and open circuit tests give you copper and iron losses respectively. I think you can show that theoretically co
/archives//html/Amps/2005-08/msg00392.html (8,342 bytes)

171. Re: [Amps] Metric Conversion (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Thu, 11 Aug 2005 05:23:18 +0100
A standard microsoft trick, to get you to upgrade the OS. For some applications, such as drivers for hardware, firewalls, network monitoring software etc, it would be more work to write the program t
/archives//html/Amps/2005-08/msg00395.html (10,202 bytes)

172. Re: [Amps] Testing filament xfmr (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Thu, 11 Aug 2005 20:06:41 +0100
But then any transformer that gets too hot open circuit is suspect. I guess if you run the input voltage too low, or run it at 50 Hz when it is designed for 60Hz, then it might get too warm then. But
/archives//html/Amps/2005-08/msg00413.html (9,040 bytes)

173. [Amps] Anyone got manual for HP 3457A bench multimeter? (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Sun, 14 Aug 2005 01:51:51 +0100
Title pretty much says it all really. I'm looking for an electronic manual (user or user+sevice) for one of these http://www.amplifier.cd/Test_Equipment/Hewlett_Packard/HP_meter/HP3457A.htm I don't o
/archives//html/Amps/2005-08/msg00477.html (6,901 bytes)

174. Re: [Amps] Anyone got manual for HP 3457A bench multimeter? (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Sun, 14 Aug 2005 03:38:42 +0100
Thanks for that Ken - I never found it on the site when I looked, so I guess I was looking in the wrong place. If anyone has a user manual, I would appreciate a copy. Dave Kirkby, G8WRB -- David Kirk
/archives//html/Amps/2005-08/msg00479.html (8,098 bytes)

175. Re: [Amps] [TowerTalk] Are All Low-Pass Filters Alike? - (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Tue, 16 Aug 2005 22:38:20 +0100
I missed the start of this - not sure why the messages did not appear, unless someone has changed the title. It is possible to design filter that present a constant impedance over a wide frequency r
/archives//html/Amps/2005-08/msg00553.html (9,041 bytes)

176. Re: [Amps] Silver plating tank hardware (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Wed, 17 Aug 2005 08:56:36 +0100
The first question to ask yourself is why are you wanting it plated? Will the benefits outweigh the cost? I had the tank circuit of my W1SL homebrew PA silver plated for use on 2m. A friend got it pl
/archives//html/Amps/2005-08/msg00558.html (8,385 bytes)

177. Re: [Amps] 4CX600J/8809 or 4CX600JA/8921 (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Thu, 18 Aug 2005 00:57:19 +0100
Yes, they are on my web - see. http://www.g8wrb.org/data/Eimac/4CX600J.pdf The 4CX600A and 4CX600JA are both in the same 6-page data sheet, which has the constant current curves you want. You will fi
/archives//html/Amps/2005-08/msg00583.html (7,537 bytes)

178. Re: [Amps] Anyone got manual for HP 3457A bench multimeter? (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Thu, 18 Aug 2005 18:12:55 +0100
If anyone else here has a 3457A, I have now found a user manual - along with a lot of other manuals on HP kit at http://nm2.org/files/ -- David Kirkby, G8WRB Please check out http://www.g8wrb.org/ of
/archives//html/Amps/2005-08/msg00595.html (7,915 bytes)

179. Re: [Amps] BK Precision Test Equipment (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Thu, 18 Aug 2005 22:19:43 +0100
I think we can all be thankful Agilent have taken a *very* different line to BK when it comes to documentation: From the site you link - I used '()' to indicate the bits from the site, and '//' to ad
/archives//html/Amps/2005-08/msg00599.html (10,834 bytes)

180. Re: [Amps] Spam and worms attachments from mailing list (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Mon, 29 Aug 2005 11:34:00 +0100
It is not JPEG's that have a problem, but how Internot Exploiter handles files with the .jpg or .jpeg extension. -- David Kirkby, G8WRB Please check out http://www.g8wrb.org/ of if you live in Essex
/archives//html/Amps/2005-08/msg00750.html (9,363 bytes)

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