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Total 78 documents matching your query.

41. Re: [Amps] Alpha 77Dx -Adding Grounded Grid Filament Choke (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Sun, 06 Mar 2005 08:14:40 -0500
<snip> In the case of the GS-35B, the internal connection between the cathode and the filament places the heater at RF potential so the RF choke will be required on both sides of the filament. If you
/archives//html/Amps/2005-03/msg00151.html (11,391 bytes)

42. Re: [Amps] Liquid Cooling Systems (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Fri, 11 Mar 2005 12:54:47 -0500
Many of the coolants that have been discussed in this thread require a pressurized system to work properly (like automotive systems). There is an ethylene glycol based coolant that is used in welding
/archives//html/Amps/2005-03/msg00289.html (9,901 bytes)

43. Re: [Amps] nylons (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Tue, 15 Mar 2005 23:56:01 -0500
Tomm, John and the group, I agree about not using nylon in high RF fields. Best to use something better. Going directly to John's question about 3/8"x1/2 inch insulators, instead of going to the hard
/archives//html/Amps/2005-03/msg00358.html (10,549 bytes)

44. Re: [Amps] nylons (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Wed, 16 Mar 2005 13:21:11 -0500
I agree and MSC carries G10 rod, tube and sheet. It's found on page 1794 of their big book: <http://www1.mscdirect.com/CGI/NNPDFF?PMPAGE=1794> A 48" length of 3/8" rod lists for $12.08 so 48x2=96-4(2
/archives//html/Amps/2005-03/msg00380.html (12,038 bytes)

45. Re: [Amps] re. nylons (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Thu, 17 Mar 2005 00:43:39 -0500
I couldn't find the Macron product using Google but it sounds a lot like glass filled PTFE. 73, Tony W4ZT _______________________________________________ Amps mailing list Amps@contesting.com http://
/archives//html/Amps/2005-03/msg00387.html (7,338 bytes)

46. Re: [Amps] Henry 2K Classic X (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Sat, 19 Mar 2005 14:08:53 -0500
<snip> I think we've all done foolish things! Don't you suppose that with your pencil you may have started the arc at a much shorter distance and then pulled the pencil away maintaining the arc in th
/archives//html/Amps/2005-03/msg00420.html (9,164 bytes)

47. Re: [Amps] Measuring RF Power (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Mon, 21 Mar 2005 11:53:31 -0500
It may be worth mentioning that RMS is the usual method of defining a DC equivalent which, given a pure waveform, will be about the same as the average. With distorted waveforms RMS will not define t
/archives//html/Amps/2005-03/msg00454.html (7,403 bytes)

48. Re: [Amps] MLA-2500B Question (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Mon, 28 Mar 2005 17:57:16 -0500
I find that interesting also. There appear to be three distinct camps: 1) Use no tuned input and use the radio output circuit (tuner on some solid state rigs) to make the match, 2) Use a tuned input
/archives//html/Amps/2005-03/msg00637.html (16,639 bytes)

49. Re: [Amps] MLA-2500B Question (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Mon, 28 Mar 2005 22:57:31 -0500
I have gotten the same advice / impressions. A tuned input adjacent to the cathode appears to be the only true way to get a good flywheel effect. I suppose, if you didn't care about improving the IMD
/archives//html/Amps/2005-03/msg00654.html (8,852 bytes)

50. Re: [Amps] MLA-2500B Question (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Tue, 29 Mar 2005 02:40:48 -0500
Hi Will. We agree that's what "should" be, but that's why we're having this discussion. The very subject line of this thread and the fact that the MLA-2500B doesn't have tuned input and the AL-811 do
/archives//html/Amps/2005-03/msg00664.html (13,927 bytes)

51. Re: [Amps] Transistor amps (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Tue, 29 Mar 2005 03:16:59 -0500
Those are very interesting! I noticed that the 9701 paper mentioned an interesting problem in the input circuit relating to the wild excursions of input impedance and the fact that, under some condit
/archives//html/Amps/2005-03/msg00666.html (13,351 bytes)

52. Re: [Amps] MLA-2500B Question (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Tue, 29 Mar 2005 11:46:59 -0500
Agreed, cost is an issue for the manufacturing world as it is for individuals but this isn't about the cost. Once again, back to Tomm's question: I believe it is not a good idea to depend on a rig's
/archives//html/Amps/2005-03/msg00688.html (18,362 bytes)

53. Re: [Amps] MLA-2500B Question (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Tue, 29 Mar 2005 23:12:50 -0500
I thought I would be sorry but without getting emotional about the issues we have good technical discussions and I always learn from them. Here is a point I think I differ with you. It's not only abo
/archives//html/Amps/2005-03/msg00712.html (14,804 bytes)

54. Re: [Amps] MLA-2500B Question (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Tue, 29 Mar 2005 23:24:49 -0500
Be careful Dan, that might put you on the wrong side of the fence. Sometimes I don't feel like I know so much. I do love asking questions and I do love learning about how others have solved these pro
/archives//html/Amps/2005-03/msg00713.html (10,882 bytes)

55. Re: [Amps] Even more power solid-state amp's (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Fri, 01 Apr 2005 09:05:30 -0500
There would probably be little interest in twin 8877's, too common and not enough db, but maybe twin YC-156s... ;~) I'd bet there'll still be a bunch of tubes around in ten years. Judging from my gar
/archives//html/Amps/2005-04/msg00009.html (8,223 bytes)

56. Re: [Amps] Non inductive resistor (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Tue, 05 Apr 2005 21:30:42 -0400
I think y'all can find what you want here: <http://www.globar.com/> 73, Tony W4ZT _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mai
/archives//html/Amps/2005-04/msg00118.html (8,338 bytes)

57. Re: [Amps] Even more power solid-state amp's (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Fri, 08 Apr 2005 08:24:23 -0400
Oh yeah! And it would definitely get more attention! Granted... warmth, but that'll be like sitting around the central heat vent and using your imagination to see and feel the glow of the fire (excep
/archives//html/Amps/2005-04/msg00169.html (9,275 bytes)

58. Re: [Amps] plate choke (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Thu, 14 Apr 2005 10:15:28 -0400
I agree with Rich that fiberglass tube is by far the least costly material and is commonly available. It may come down to a matter of comparing the minimum order from your supplier with the cost of a
/archives//html/Amps/2005-04/msg00275.html (8,892 bytes)

59. Re: [Amps] Led display problem (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Tue, 19 Apr 2005 16:33:28 -0400
If you really like the LED bar meters you should take a look at Paul Hewitt's display at <http://home.earthlink.net/%7Ewd7s/ds-1.htm>. 73, Tony W4ZT _______________________________________________ Am
/archives//html/Amps/2005-04/msg00403.html (9,429 bytes)

60. Re: [Amps] Shorting Sticks (score: 1)
Author: Tony King - W4ZT <amps@w4zt.com>
Date: Sun, 24 Apr 2005 17:34:50 -0400
I think you all have valid points and a simple combination of your suggestions will satisfy everyone. Place Rich's 1000 ohm resistor in the supply with one end connected to the HV supply in a positio
/archives//html/Amps/2005-04/msg00497.html (15,570 bytes)

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