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Total 1051 documents matching your query.

41. [Amps] 811's in a Clipperton L (score: 1)
Author: monk via Amps <amps@contesting.com>
Date: Tue, 5 Aug 2014 09:31:43 -0700
Check an see if the high voltage section is a doubler, if so wire it for a full wave or bridge. If it isn't a doubler check and see if the filament voltage is 6.3 or 12.6. If it is 12.6 ( two tubes i
/archives//html/Amps/2014-08/msg00033.html (7,292 bytes)

42. [Amps] MLA-2500 problem (score: 1)
Author: Roger Parsons via Amps <amps@contesting.com>
Date: Fri, 22 Aug 2014 16:50:54 -0700
I have two MLA2500s and a problem that I have had with both of them is the metering push buttons not making proper contact - particularly on the HV range - leading to lower than actual meter readings
/archives//html/Amps/2014-08/msg00060.html (6,722 bytes)

43. Re: [Amps] low band PA (score: 1)
Author: Dave Hartman via Amps <amps@contesting.com>
Date: Sun, 24 Aug 2014 15:15:49 -0400
Here's another to look at: http://home.roadrunner.com/~alexmm/EB104/eb104inf.htm <http://home.roadrunner.com/%7Ealexmm/EB104/eb104inf.htm> 73 Dave - AC2GL -- This email is free from viruses and malwa
/archives//html/Amps/2014-08/msg00066.html (7,451 bytes)

44. [Amps] 8877 input circuit 222 mhz. (score: 1)
Author: mike via Amps <amps@contesting.com>
Date: Tue, 26 Aug 2014 17:29:08 -0400 (EDT)
What is the procedure for checking the input circuit for a 8877 amplifier. It is a 222 mhz amp. Can I feed a few watts thru a bird and adjust the coils for lowest SWR? I can't remember how I did this
/archives//html/Amps/2014-08/msg00068.html (6,642 bytes)

45. [Amps] Need 1000 pf 4 kv feedthru (score: 1)
Author: mike via Amps <amps@contesting.com>
Date: Mon, 1 Sep 2014 15:48:14 -0400 (EDT)
I am looking for a few 1000 pf 4 kv. feed thru caps. Let me know what you have and a shipped price to 44131. Thanks Mike _______________________________________________ Amps mailing list Amps@contest
/archives//html/Amps/2014-09/msg00000.html (6,107 bytes)

46. Re: [Amps] Henry 3k Filament transformer taps (score: 1)
Author: Gerald Williamson via Amps <amps@contesting.com>
Date: Mon, 8 Sep 2014 12:24:39 -0400
Hi All, if there is room for a Variac it makes for a nice solution for setting filament voltage. If space is limited a small value resistor can be connected in series with the transformer primary to
/archives//html/Amps/2014-09/msg00007.html (9,632 bytes)

47. Re: [Amps] Henry 3k Filament transformer taps (score: 1)
Author: darrell wyatt via Amps <amps@contesting.com>
Date: Mon, 8 Sep 2014 13:18:25 -0700
thats the unloaded floating voltage load it with something to use the current and it should drop to around 7.5v KK4RSV Remember that you need to measure the voltage under full load. -- Vic, K2VCO/4X6
/archives//html/Amps/2014-09/msg00008.html (9,715 bytes)

48. Re: [Amps] solid state relays (score: 1)
Author: Ronald Brown via Amps <amps@contesting.com>
Date: Mon, 8 Sep 2014 18:35:54 -0700
Glen, I am using SS relays without problems. Also note that PB does make 120VAC triggered SS relays so they are not all DC controlled. My relays are 50A, 120vac actuated. Ron - K0idx ________________
/archives//html/Amps/2014-09/msg00009.html (7,274 bytes)

49. Re: [Amps] Henry 3k Filament transformer taps (score: 1)
Author: Glen Zook via Amps <amps@contesting.com>
Date: Tue, 9 Sep 2014 08:02:56 -0700
125-VAC +/- 2-volts / 250-VAC +/- 4-volts is now the "norm" for most major electric companies in the United States with voltages on the "+" side being prevalent during the warmer months when air cond
/archives//html/Amps/2014-09/msg00011.html (10,663 bytes)

50. [Amps] 6146 AM Modulation (score: 1)
Author: Radio WC6W via Amps <amps@contesting.com>
Date: Tue, 16 Sep 2014 08:35:55 -0700
As part of a curious Amplifer project I'm seeking the proper percentage of Screen Modulation to achieve 100% Plate Modulation of a 6146.  The Screen will be sourced from an independent supply modulat
/archives//html/Amps/2014-09/msg00015.html (7,281 bytes)

51. Re: [Amps] W6PO 2m amp drawings (score: 1)
Author: mike via Amps <amps@contesting.com>
Date: Tue, 30 Sep 2014 06:19:13 -0400
Did you try Google? That should be all over the net. Mike Hi Felipe http://www.landfall.net/Radio/8877-1.htm 73 Paul G4DCV On 30/09/2014 01:42, PY1NB - Felipe Ceglia wrote: Hello, By any chance, woul
/archives//html/Amps/2014-09/msg00041.html (7,897 bytes)

52. Re: [Amps] stolen Alpha (score: 1)
Author: Chris Wright via Amps <amps@contesting.com>
Date: Sun, 5 Oct 2014 20:07:22 +0000 (UTC)
That would be so low if it was a Ham, but reading your information it certainly looks that way. Or a Ham paying someone that is involved in radio gear.   Looking for a High Quality Amplifier? If you
/archives//html/Amps/2014-10/msg00017.html (8,565 bytes)

53. Re: [Amps] HV Diodes (score: 1)
Author: Glen Zook via Amps <amps@contesting.com>
Date: Wed, 8 Oct 2014 09:23:12 -0700
Agree completely with Carl! 1N5408 diodes, mounted on perf-board, works fine. Depending on the size of the holes in the board, one may have to slightly enlarge them to get the thicker gauge wire of t
/archives//html/Amps/2014-10/msg00027.html (11,470 bytes)

54. Re: [Amps] HV Diodes (score: 1)
Author: Gerald Williamson via Amps <amps@contesting.com>
Date: Sat, 11 Oct 2014 12:59:45 -0400
Seems having a little headroom during a KAPOW event might be a good thing. Even with a surge limiting resistor in the B+ the current flow can be quite high and unlike a turn on surge, the current is
/archives//html/Amps/2014-10/msg00050.html (12,727 bytes)

55. Re: [Amps] HV Diodes (score: 1)
Author: Glen Zook via Amps <amps@contesting.com>
Date: Mon, 13 Oct 2014 07:29:29 -0700
Who is paying 9.99-cents for a 1N4007? I pay 2-cents for them in 100 quantity. I keep a drawer full to use anywhere I need a silicon power diode. I was paying like 10-cents each for 1N5408. However,
/archives//html/Amps/2014-10/msg00055.html (15,852 bytes)

56. Re: [Amps] SOURCE FOR 3CX800'S (score: 1)
Author: Robert Dorchuck W6VY via Amps <amps@contesting.com>
Date: Wed, 15 Oct 2014 18:37:20 -0700
Alpha has 3CX800A7's for $400. That's not much more than 4CX800's. Bob W6VY Steve, The 3CX800 is becoming a premium and "hard to get" tube... have you considered modifying the Alpha to use 4CX800 (GU
/archives//html/Amps/2014-10/msg00067.html (9,061 bytes)

57. Re: [Amps] HV Diodes (score: 1)
Author: Louis Parascondola via Amps <amps@contesting.com>
Date: Fri, 17 Oct 2014 03:40:41 -0400
we have been waiting on that dual 8877 amp with roller inductor for some time now. Many die hard hams would prefer that over solid state. --Original Message-- From: Dan Simmonds <info@dedicatedrf.com
/archives//html/Amps/2014-10/msg00106.html (9,506 bytes)

58. Re: [Amps] HV Diodes (score: 1)
Author: Louis Parascondola via Amps <amps@contesting.com>
Date: Fri, 17 Oct 2014 06:19:04 -0400
Why one 3CX3000A7 amp? Sure, why not? Why one 3CX3000A7 amp? we have been waiting on that dual 8877 amp with roller inductor for some time now. Many die hard hams would prefer that over solid state.
/archives//html/Amps/2014-10/msg00108.html (9,428 bytes)

59. Re: [Amps] HV Diodes (score: 1)
Author: Louis Parascondola via Amps <amps@contesting.com>
Date: Fri, 17 Oct 2014 06:40:32 -0400
Alpha has been using those tubes because they get them cheap from China. You can by 2 maybe 3 of them for the price of one Eimac 8877. Although the Chinese do make 8877's and 3cx800's now. There has
/archives//html/Amps/2014-10/msg00110.html (10,670 bytes)

60. Re: [Amps] HV Diodes (score: 1)
Author: Louis Parascondola via Amps <amps@contesting.com>
Date: Fri, 17 Oct 2014 08:49:04 -0400
yeah for the commercial ham market. That is another consideration. for a commercial amp. now.... is cheap, and well made. The 3x3 is great for hb amp builders. However, to do it right means vac tune
/archives//html/Amps/2014-10/msg00112.html (11,601 bytes)

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