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Total 62 documents matching your query.

41. Re: [Amps] Working on my Darwin award (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Sun, 23 Feb 2014 17:29:17 -0800
On 2/23/2014 8:23 AM, Fuqua, Bill L wrote: I always liked the front panel circuit breaker on commercial equipment that is a sure fire way to remove all power in the instrument, except the line going
/archives//html/Amps/2014-02/msg00243.html (9,337 bytes)

42. Re: [Amps] Working on my Darwin award (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Sun, 23 Feb 2014 20:11:15 -0800
I built an amp using a pair of 813's. One time I was working on it and and had disconnected the power supply to work on the amp part. When I turned it back on, I heard this buzzing noise in the recei
/archives//html/Amps/2014-02/msg00246.html (10,060 bytes)

43. Re: [Amps] been dead here (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Wed, 12 Mar 2014 09:54:09 -0700
UFO abduction. 73 Tom W7WHY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2014-03/msg00052.html (6,734 bytes)

44. Re: [Amps] B&W PT-2500A on 10m? (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Tue, 01 Apr 2014 21:45:50 -0700
up!!). Is there a simple modification to enable 10m in this sucker? I don't see anything in the manual nor schematic. Google found this. http://lists.contesting.com/_amps/2002-05/msg00308.html 73 Tom
/archives//html/Amps/2014-04/msg00009.html (6,824 bytes)

45. Re: [Amps] Clipperton L (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Tue, 08 Apr 2014 18:06:42 -0700
Hello: Today when I turned on my Clipperton L This happened / amp power up makes loud hum relay clicks rapidly blows fuse / amp is wired for 120 v. and has 4 chinese 572 B's. It has been in use dail
/archives//html/Amps/2014-04/msg00097.html (8,197 bytes)

46. [Amps] SB-200 input. (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Thu, 24 Jul 2014 10:11:25 -0700
Hi All I was reading an article in an older QST about doing a conversion on a SB-200. One of the things they did was take the tuned input out and put in a 4:1 toroid on the input, as the input impeda
/archives//html/Amps/2014-07/msg00105.html (6,657 bytes)

47. Re: [Amps] SB-200 input. (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Thu, 24 Jul 2014 17:17:12 -0700
I know the SB-200 has tuned inputs. Two of the coils in this one are bad. One of the caps is bad. Can you give me a source where I can buy new coils for the inputs? I need the ones for 15 and 10 mete
/archives//html/Amps/2014-07/msg00106.html (7,982 bytes)

48. Re: [Amps] 572B - News? (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Fri, 07 Nov 2014 12:30:52 -0800
I had a FL-2100B and did the bias mod that RF Parts recommended. It worked fine with the Svetlana tubes after that. Before the mod, right after I put the tubes in, I keyed the amp with no drive and i
/archives//html/Amps/2014-11/msg00014.html (9,296 bytes)

49. [Amps] SB-200 input tuning (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Thu, 08 Jan 2015 11:45:17 -0800
What is the best tool for adjusting the input SWR on the SB-200? I would assume it has to be a non-conductive tool. Thanks and 73 Tom W7WHY _______________________________________________ Amps mailin
/archives//html/Amps/2015-01/msg00007.html (6,266 bytes)

50. Re: [Amps] The genius of ham radio (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Sun, 11 Jan 2015 21:01:10 -0800
Yes, I think there are a lot of people like this. I see post after post about modeling antennas, theory, etc, but seems like I never see these people on the air. Think they are so worried about getti
/archives//html/Amps/2015-01/msg00031.html (7,318 bytes)

51. Re: [Amps] Multi-tube vs Single or Dual-tube amps? (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Mon, 19 Jan 2015 21:13:13 -0800
I remember the WRL Galaxy 2000 had 10 sweep tubes in it. That was quite a beast :-) 73 Tom W7WHY ( and eight 1646s might not hit 15 meters ) Don W4DNR REPLY: That problem of excessive output capacita
/archives//html/Amps/2015-01/msg00173.html (9,807 bytes)

52. Re: [Amps] 5 Minutes for Ameritron 811H to warm up? (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Thu, 22 Jan 2015 19:31:10 -0800
What does he mean, 'warms up'? 73 Tom W7WHY Well, a local Ham has a brother who likes to buy, try, & sell Ham gear and he just happened to have an Ameritron 811H in need of a new home. His asking pri
/archives//html/Amps/2015-01/msg00204.html (7,942 bytes)

53. Re: [Amps] 5 Minutes for Ameritron 811H to warm up? (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Thu, 22 Jan 2015 20:06:08 -0800
I have an AL-811H and there is no start circuit. It comes on when you flip the 'on' switch. From the plug there is fuse, interlock, and on/off switch. That is why I wondered what he meant when he sai
/archives//html/Amps/2015-01/msg00208.html (8,901 bytes)

54. Re: [Amps] Chippewa amplifier (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Sun, 22 Mar 2015 08:35:09 -0700
Wow - $1000?? Be much better off to get a SB-220 for half that. 73 Tom W7WHY http://www.ebay.com/itm/Rare-Vintage-Heathkit-Tube-Linear-Amplifier-Chippewa-KL-1-for-Ham-Radio-/281630963209?pt=LH_Defaul
/archives//html/Amps/2015-03/msg00056.html (7,679 bytes)

55. Re: [Amps] Watt Meters? (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Sun, 03 May 2015 17:35:50 -0700
Yeah - I'd hate to spend a grand to find out that I'm actually running 510 watts instead of 500 :-) 73 Tom W7WHY "The man who has but one watch always knows what time it is, while the man who has two
/archives//html/Amps/2015-05/msg00036.html (6,886 bytes)

56. Re: [Amps] Time for New Power Meter (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Mon, 04 May 2015 13:56:55 -0700
Hi Bill Unfortunately, you can run any power you want and say anything you want on the air now and the FCC doesn't give a big rats a**. If you think that is not a true statement, listen to 3840 any e
/archives//html/Amps/2015-05/msg00062.html (10,138 bytes)

57. Re: [Amps] Hunter Bandit 2000C, arcing in the tuning cap. (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Sat, 16 May 2015 13:37:52 -0700
I had an antenna tuner here that would let the SWR drift when tuning up and sometimes arc. After all sorts of trial and error fixes, I finally loosened the lock nut on the end of the tuning caps and
/archives//html/Amps/2015-05/msg00118.html (8,202 bytes)

58. Re: [Amps] Ham sells fine grit thing to clean contacts (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Sun, 16 Aug 2015 18:28:02 -0700
Someone told me once that strips of paper from a brown paper bag works good for cleaning relay contacts. 73 Tom W7WHY 73, Jim - w5ifp@gvtc.com _______________________________________________ Amps mai
/archives//html/Amps/2015-08/msg00051.html (7,609 bytes)

59. [Amps] 813's (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Mon, 21 Dec 2015 10:57:04 -0800
Why are 813 tubes considered 'dirty'? I have an old amp in the attic I haven't used for a long time that has a pair of 813's in it I have read somewhere that they are a very 'dirty' tube. I'd assume
/archives//html/Amps/2015-12/msg00042.html (6,861 bytes)

60. Re: [Amps] 813's (score: 1)
Author: Tom Osborne <w7why@frontier.com>
Date: Tue, 22 Dec 2015 09:43:27 -0800
Hi Colin When I was using this amp it didn't have a tuned input. I was using a Yeasu FT-102 to drive it and it had the pi-net so didn't bother with the input tuning. I had a power transformer out of
/archives//html/Amps/2015-12/msg00051.html (8,110 bytes)

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