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References: [ +from:keepwalking188@yahoo.com: 238 ]

Total 238 documents matching your query.

41. Re: [Amps] SB-220 and Graphite tubes in high duty cycles (score: 1)
Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
Date: Sun, 5 Jul 2009 11:31:03 +0800
Carl, That SB220 stock transformer is really a marginal design. The SB200 is a far sturdy bird albeit at a lower voltage - even when compared under the same current draw. And wow, when the winding sh
/archives//html/Amps/2009-07/msg00104.html (22,062 bytes)

42. Re: [Amps] monitoring tube seal temps (score: 1)
Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
Date: Mon, 6 Jul 2009 00:49:30 +0800
The cat's meow on this kind of thing is a thermal image camera. Just like james bond. You can zoom in on a specific feature and profile the spot pretty precisily. There's a few pics on my qrz page of
/archives//html/Amps/2009-07/msg00115.html (9,070 bytes)

43. Re: [Amps] monitoring tube seal temps (score: 1)
Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
Date: Tue, 7 Jul 2009 12:44:01 +0800
Guys, I saw one of the Acom 2000 on the bench of a buddy once. That thing has some sensors in the tube exhaust. It scales up the fan speed based on the temp so the fan only runs at a speed as needed.
/archives//html/Amps/2009-07/msg00133.html (12,150 bytes)

44. Re: [Amps] Tube choice for SB-200 on 6 meters (score: 1)
Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
Date: Sun, 12 Jul 2009 16:09:00 -0500
Larry, I don't want to dispute Carl's experience in the 572b 6m conversion category. But I cay say that if you are interested in digimodes or RTTY, the 572b is going to be one seriously suffering set
/archives//html/Amps/2009-07/msg00162.html (11,227 bytes)

45. Re: [Amps] grounding grids (score: 1)
Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
Date: Thu, 30 Jul 2009 21:11:09 -0500
Great idea Jack. 73/jeff/ac0c _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2009-07/msg00421.html (9,573 bytes)

46. Re: [Amps] Eimac AS newsletters (score: 1)
Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
Date: Fri, 31 Jul 2009 15:19:52 -0500
Dave, Not to trouble you... I would like to see if you have the Eimac series in PDF form. There are a lot of guys here who have expressed interest in this but all we know about is the basic care-and-
/archives//html/Amps/2009-07/msg00446.html (9,081 bytes)

47. Re: [Amps] HV mesuring (score: 1)
Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
Date: Sun, 16 Aug 2009 12:10:47 -0500
Mike, As a guy with several fried DVM sitting on my bench, I would strongly recommend against this. In addition to the fireworks that come from overstepping one of the DVM's breakdown voltage, at the
/archives//html/Amps/2009-08/msg00329.html (9,443 bytes)

48. Re: [Amps] Eimac AS newsletters (score: 1)
Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
Date: Mon, 24 Aug 2009 20:41:46 -0500
Hi Dave, I wanted to follow up with you on this and see if you had the chance to finish the pdf conversion on these old Eimac newsletters? 73/jeff/ac0c _______________________________________________
/archives//html/Amps/2009-08/msg00477.html (12,370 bytes)

49. Re: [Amps] to buy 8 pieces 200uF 500V caps (score: 1)
Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
Date: Mon, 14 Sep 2009 12:46:58 +0800
Laslo, I used this guy on ebay - he has some 100 uF parts under item # 270453172888. 10 pcs delivered to US for $18 USD. Ships from Hong Kong via fed express. I think I got my set of 10x680uF/450 in
/archives//html/Amps/2009-09/msg00186.html (9,900 bytes)

50. Re: [Amps] Amplifier scenario question (score: 1)
Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
Date: Thu, 17 Sep 2009 22:20:24 +0800
The most excellent N8LP LP100A has this feature as well. And I noticed that my MFJ996 (or is it 998) has a cutout bypass that ties into the PTT line. I think there are a lot of boxes out now that pro
/archives//html/Amps/2009-09/msg00232.html (9,839 bytes)

51. Re: [Amps] Dimished Tube Life (score: 1)
Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
Date: Fri, 25 Sep 2009 16:55:11 +0800
Mike, The simple answer is that there are too many variables to say with any possible level of accuracy. Eventually that heater will stop boiling off electrons and the output will drop. But that coul
/archives//html/Amps/2009-09/msg00301.html (12,808 bytes)

52. Re: [Amps] Watts to DBM?? (score: 1)
Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
Date: Fri, 25 Sep 2009 17:22:01 +0800
Go to mini-circuits.com. Application notes tab. There is an excellent conversion table there for download. 73/jeff/ac0c _______________________________________________ Amps mailing list Amps@contesti
/archives//html/Amps/2009-09/msg00304.html (8,891 bytes)

53. Re: [Amps] PEP Reading Wattmeter (score: 1)
Author: "keepwalking188@yahoo.com" <keepwalking188@yahoo.com>
Date: Fri, 2 Oct 2009 05:16:49 -0700 (PDT)
Got the LP100 myself and love it. Looks great with my rig too. Larry has a variety of couplers for it also in case you need a variety there as well. First class build quality also. I especially like
/archives//html/Amps/2009-10/msg00017.html (11,187 bytes)

54. Re: [Amps] Checking Plate Choke resonance (score: 1)
Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
Date: Tue, 13 Oct 2009 20:07:55 -0500
Hi Bill, I am a bit confused on this. It's been a while - but I was thinking that I read one time on RM's site about creating an intentional parallel resonance on the filament choke. That's a differe
/archives//html/Amps/2009-10/msg00205.html (9,913 bytes)

55. Re: [Amps] B- questions (score: 1)
Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
Date: Tue, 10 Nov 2009 00:27:13 -0600
Carl, B+ lead to touch the grid current meter. That was exciting. Fortunately, I had liked RM's advice on clamping diodes "I like big big diodes" - and so had a pair of the 6A variety across the mete
/archives//html/Amps/2009-11/msg00160.html (14,919 bytes)

56. Re: [Amps] GI-7B (score: 1)
Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
Date: Sat, 5 Dec 2009 13:12:40 -0600
Mike, The tube will run at that voltage (it's pulse rated at something like 7KV or whatever so the problem of internal arc should not be the factor), but in my evaluation of a pair running from 1800v
/archives//html/Amps/2009-12/msg00127.html (8,379 bytes)

57. Re: [Amps] GI-7B (score: 1)
Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
Date: Sun, 6 Dec 2009 13:18:27 -0600
Guys, My amp is just one data point - maybe other guys have data on amp efficiency mapped against plate voltage. So don't make your final decision considering my comment - I could be wrong. Lot of ot
/archives//html/Amps/2009-12/msg00171.html (14,988 bytes)

58. Re: [Amps] Svetlana 4CX800 (score: 1)
Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
Date: Tue, 8 Dec 2009 12:38:59 -0600
I have bought quite a few tubes from QRO. Fast shipment and decent pricing. I have had 1 tube that failed the hi-pot test. After some discussion with QRO, there was no recourse in the end - so I woul
/archives//html/Amps/2009-12/msg00234.html (10,010 bytes)

59. Re: [Amps] Chinese DIN connectors (score: 1)
Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
Date: Thu, 10 Dec 2009 02:07:38 -0600
Steve, I have ordered from rfsupplier quite a few times now. Quite happy with the products and the service. The only minor complaint I have seen is on a couple of the BNC plugs where the fit was not
/archives//html/Amps/2009-12/msg00261.html (7,737 bytes)

60. Re: [Amps] Chinese DIN connectors (score: 1)
Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
Date: Thu, 10 Dec 2009 15:56:08 -0600
Vic, That is a great idea. I worked in a board-mount shop in college and we would put al clips on heat sensitive parts (including pins). But this potato idea is great - especially for these small par
/archives//html/Amps/2009-12/msg00278.html (9,744 bytes)

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