Mail Archive Search: <+from:bjk@ihug.co.nz>

Results:

References: [ +from:bjk@ihug.co.nz: 106 ]

Total 106 documents matching your query.

41. [AMPS] 14KW (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Fri, 17 Aug 2001 10:30:38 +1200; We are born, and then we die. All human endeavour is slightly absurd if looked at from a longer view. Might as well enjoy it! 73 Baz end Barry Kirkwood PhD ZL1DD Signal Hill Homestay 66 Cory Road Pal; /archives//html/Amps/2001-08/msg00166.html (9,720 bytes)
42. [AMPS] The Economics of QRO, or Where do all the big TXs go? (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Fri, 17 Aug 2001 14:56:34 +1200; Downunder, where we forelock tugging subjects of the dear Queen would never even contemplate exceeding our150 watt max input power limit, I once had cause to contemplate the economics of QRO. Now 14-; /archives//html/Amps/2001-08/msg00176.html (8,306 bytes)
43. [AMPS] Useful website (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Mon, 20 Aug 2001 13:26:01 +1200; I can recommend PSU designer freeware at: www.duncanamps.com 73 end Barry Kirkwood PhD ZL1DD Signal Hill Homestay 66 Cory Road Palm Beach Waiheke Island 1240 NEW ZEALAND www.waiheke.co.nz/signal.htm; /archives//html/Amps/2001-08/msg00234.html (6,466 bytes)
44. [AMPS] Re: [Drake] L4B power output (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Thu, 23 Aug 2001 08:12:33 +1200; Agree on the 220V. The Drake power supply is a bit feeble. A more rugged power supply will give significantly more output with no problems, but most important of all, if it has good regulation will g; /archives//html/Amps/2001-08/msg00295.html (8,388 bytes)
45. [AMPS] 50~ vs 60~ ??? (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Mon, 4 Jun 2001 07:36:33 +1200; It is most unusual for transformers of a size commonly used in the amateur service and rated 60Hz to "burn up" when used on 50Hz. Worst case is usually poor regulation. If the 60Hz device "burns up"; /archives//html/Amps/2001-06/msg00031.html (9,501 bytes)
46. [AMPS] 50~ vs 60~ ??? (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Mon, 4 Jun 2001 07:42:37 +1200; More: The problem with the 2K was probably not the transformer but the tuned choke. Adding C would shift in to 100hz and restore the regulation. True, the core will saturate sooner at 50Hz but tthis; /archives//html/Amps/2001-06/msg00032.html (10,255 bytes)
47. [AMPS] 50~ vs 60~ ??? (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Mon, 4 Jun 2001 08:35:17 +1200; Hi Paul et al: We have been down this track on this reflector before. 50Hz at 230 or thereabout volts is the common mains supply in the UK, Australia, New Zealand and quite a lot of other places. It; /archives//html/Amps/2001-06/msg00035.html (13,544 bytes)
48. [AMPS] 50~ vs 60~ ??? (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Tue, 12 Jun 2001 09:46:37 +1200; I am no guru on transformers, but would be surprised if 50-60 Hz shift needed anything like 30% more iron for equal performance. Is there someone on the reflector who has transformer design tables/so; /archives//html/Amps/2001-06/msg00097.html (14,913 bytes)
49. [AMPS] Review of Antenna Tuner from Dayton (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Thu, 21 Jun 2001 17:03:20 +1200; FWIW, RSGB Radio Communication magazine a while back showed how the caps on a conventional T match could be made to operate simple shorting switches at the extreme end of their rotation, thereby conv; /archives//html/Amps/2001-06/msg00216.html (12,499 bytes)
50. [AMPS] Thar she blows (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Tue, 15 May 2001 09:27:54 +1200; Years ago I had an SB220 and I was impressed with the quiet fan, pushing air transversly around the 3-500s. But I did have one filament pin unsolder, possibly a manufacturing defect but likely to be; /archives//html/Amps/2001-05/msg00270.html (8,351 bytes)
51. [AMPS] Thar she blows (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Tue, 15 May 2001 09:56:31 +1200; Yes indeed, and Amen! One of the advantages in homebrewing amps is that one can overdesign to an extent that would be totally unecomic from a commercial point of view. Now if I can just find the hour; /archives//html/Amps/2001-05/msg00272.html (9,093 bytes)
52. [AMPS] Thar she blows (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Tue, 15 May 2001 12:31:33 +1200; Good point, Steve. Classical texts on aerodynamics show pictures of flow around cylinders, but I have never seen a picture of airflow around a pair of cylinders broadside. It would be the same condit; /archives//html/Amps/2001-05/msg00280.html (8,869 bytes)
53. [AMPS] Voltage Doublers...thanks for the info. (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Thu, 17 May 2001 15:56:49 +1200; glenn if you have reasonable equalising resistors across the capacitor string that will give sufficient load to stop the no load volts soaring and you can fire the thing up slowly from zero volts to; /archives//html/Amps/2001-05/msg00324.html (9,720 bytes)
54. [AMPS] ALPHA 77SX on 50Hz (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Sat, 7 Apr 2001 18:38:08 +1200; We run 50Hz down here in ZL. In my experience most amateur equipment eg SB220, TL922, my Viewstar PT2000A run quite happily on 230v 50Hz. Same goes for most relativley light duty equipment. Every so; /archives//html/Amps/2001-04/msg00148.html (11,302 bytes)
55. [AMPS] ALPHA 77SX on 50Hz (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Sat, 7 Apr 2001 18:48:38 +1200; Really amazing to find that "Here be Dragons" signs light up when some North Americans are confronted with anything that is different from what they are used to. Sometimes this is quite crazy, like s; /archives//html/Amps/2001-04/msg00149.html (11,004 bytes)
56. [AMPS] Flaming Transformers (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Sat, 7 Apr 2001 21:52:56 +1200; To put it more kindly, When one reads of 1kVA plus anode supply transformers bursting into flame from magnetising current alone when transported from the safe world of 60Hz to the alien world of 50Hz; /archives//html/Amps/2001-04/msg00151.html (6,692 bytes)
57. [AMPS] 230 /115 volts (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Sun, 8 Apr 2001 05:10:58 +1200; Dear all, Thanks for the info that W/VE homes are 230V. In my ignorance I thought 110/115 was commonly available. This on account of the molten hairdryers and freaked out guests that manifest themsel; /archives//html/Amps/2001-04/msg00158.html (7,599 bytes)
58. [AMPS] 230 /115 volts (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Sun, 8 Apr 2001 08:18:55 +1200; Hello Ampers, Was enjoying making the eagle scream a bit, forgive me. Have been in the USA and Canada many times and really am familiar with mains supply conventions, and also the fact that Canada is; /archives//html/Amps/2001-04/msg00167.html (10,562 bytes)
59. [AMPS] ALPHA 77SX on 50Hz (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Sun, 8 Apr 2001 09:17:35 +1200; Yes, I think you need to be careful when running up over 1kVA or so full load, but would be very surprised if problems showed up with magnetising current alone. Have once or twice in 50 years encount; /archives//html/Amps/2001-04/msg00170.html (9,764 bytes)
60. [AMPS] QSK kit for SB200 (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Mon, 19 Mar 2001 07:37:16 +1200; This on behalf of my friend ZL1MH who is looking for a QSK kit for the Heath SB200. Any info on suppliers of such a kit gratefully received. 73 es tnx in advance. end Barry Kirkwood PhD ZL1DD Signal; /archives//html/Amps/2001-03/msg00161.html (6,862 bytes)

Current List: 41 - 60
Page: [1] [2] [3] [4] [5] [6]