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Total 193 documents matching your query.

41. Re: [Amps] Silver Strap (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Wed, 9 Jul 2008 09:40:42 -0700 (PDT)
Silvering will prevent werewolves from infesting the tank circuit. Even a ham who is pure at heart and says his prayers by night, May become a wolf, when the wolfbane blooms and the DX moon is bright
/archives//html/Amps/2008-07/msg00083.html (8,235 bytes)

42. [Amps] A Grounded Grid biasing question (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Wed, 9 Jul 2008 09:44:43 -0700 (PDT)
Has anyone ever seen a design wherein an 8877, or similar triode, operated in grounded grid has the bias generator placed in the grid return line, rather than in the typical cathode (grid + cathode c
/archives//html/Amps/2008-07/msg00084.html (7,379 bytes)

43. Re: [Amps] More pictures... (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Sat, 12 Jul 2008 13:29:18 -0700 (PDT)
Hi David, The transformer is the least of the problems in that design adventure. In fact, if a (US) legal limit transmitter is designed with a 200V drain supply, then the load impedance is circa 50 o
/archives//html/Amps/2008-07/msg00120.html (10,812 bytes)

44. [Amps] Class Phi (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Tue, 15 Jul 2008 09:12:33 -0700 (PDT)
This link may be of interest to anyone contemplating Class E or F: http://ieeexplore.ieee.org/iel5/63/4267737/04267776.pdf 73 & Good morning, Marv WC6W http://wc6w.50webs.com/ * _____________________
/archives//html/Amps/2008-07/msg00136.html (6,780 bytes)

45. Re: [Amps] Thoughts on half-wave dipole (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Sun, 27 Jul 2008 17:56:11 -0700 (PDT)
Hi Dave, The answer is yes. The Antenna Engineering Handbook, 1st edition by Jasik; later editions by others, McGraw Hill, various dates, show these relations quite well graphically but, omit the pre
/archives//html/Amps/2008-07/msg00305.html (13,983 bytes)

46. Re: [Amps] Building an Amp, Selecting a Tube (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Sun, 27 Jul 2008 17:57:37 -0700 (PDT)
Hi Roger, You wandered in several dimensions with that query. For 2 KW out, I'd recommend going with a single tube, unless providence brings something else, with sockets, your way. The obvious choice
/archives//html/Amps/2008-07/msg00306.html (14,458 bytes)

47. Re: [Amps] Building an Amp, Selecting a Tube (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Mon, 28 Jul 2008 12:38:28 -0700 (PDT)
Hi Roger, The 4CX1500B is only good for a KW out, so you'd need a pair. The other three '1500x tubes I previously noted are each good for 2KW solo. You didn't mention any size/weight restriction in y
/archives//html/Amps/2008-07/msg00343.html (15,258 bytes)

48. Re: [Amps] Anyone have a plate transformer suitable for a Gonset GSB-101 (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Mon, 25 Aug 2008 11:43:45 -0700 (PDT)
Hi Scott, If they'll fit physically, that might be a good spot for a pair of "surplus" microwave oven transformers. Pull the shunts and run the primaries in series to lower the operating flux, lift t
/archives//html/Amps/2008-08/msg00140.html (8,585 bytes)

49. Re: [Amps] Use of toroids in tank circuit of tube amp? (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Sun, 7 Sep 2008 13:04:37 -0700 (PDT)
Hi David, If you follow this link to the archives you'll find a lot of info on the topic in general: http://lists.contesting.com/archives//cgi-bin/namazu.cgi?query=toroid+tank+coil&idxname=Amps And t
/archives//html/Amps/2008-09/msg00035.html (8,870 bytes)

50. Re: [Amps] Henry Radio and 3CX1500A7 socket? (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Mon, 15 Sep 2008 08:57:41 -0700 (PDT)
Hi Tom, If you're just seeking the Johnson ceramic socket portion, I have a few of those for sale on my webpage. Look at the bottom of: http://wc6w.50webs.com/wc6wfsw/index.html?fr41.html 73 & Good m
/archives//html/Amps/2008-09/msg00142.html (8,703 bytes)

51. Re: [Amps] Load Capacitor Needed (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Wed, 8 Oct 2008 09:40:33 -0700 (PDT)
Hi Bob, I have some 1000pf units with .030 measured plate spacing -- figure .025 after wiggles. That should be good for 1200V pk. See: http://wc6w.50webs.com/wc6wfsw/index.html?fr34.html 73 & Good mo
/archives//html/Amps/2008-10/msg00043.html (8,308 bytes)

52. [Amps] Can anyone suggest a good book about Mixers? (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Thu, 9 Oct 2008 09:12:33 -0700 (PDT)
Seemingly slightly OT but, this is for use in an amplifier. :-) I've done a lot of looking and the best I can find is a page or two or at best a chapter on the subject in more general works. It would
/archives//html/Amps/2008-10/msg00045.html (7,067 bytes)

53. [Amps] Gluing blue plastic? (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Fri, 17 Oct 2008 09:32:07 -0700 (PDT)
QST I've got a translucent sky blue plastic gear that, unnecessarily because of some way too thin 1mm cross section in critical places, cracked in half in one of my radio thingy's. I've no clue as to
/archives//html/Amps/2008-10/msg00076.html (7,128 bytes)

54. Re: [Amps] Amplifier Input Circuit Consultation (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Thu, 23 Oct 2008 11:02:19 -0700 (PDT)
Hi Wayne, A 1:2 balun will provide a 4X impedance step up: 50-200 ohms. You'll have to wind something a bit on the special side for a 1-2 impedance ratio. 73 & Good morning, Marv WC6W http://wc6w.50w
/archives//html/Amps/2008-10/msg00098.html (8,922 bytes)

55. Re: [Amps] P/S connector (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Sun, 26 Oct 2008 18:34:01 -0700 (PDT)
Hi Steve, I use D connectors for that purpose myself. The 15 pin parts between the amp and the power supply. I might have some 5 or 6 pin AN connectors kicking around if you want to go "Mil-Spec" :-)
/archives//html/Amps/2008-10/msg00122.html (8,231 bytes)

56. Re: [Amps] Semtech diode (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Mon, 27 Oct 2008 19:25:27 -0700 (PDT)
Hi John, An individual diode, or other semiconductor device, when it is sawn free from the wafer but, unpackaged. 73 & Good evening, Marv WC6W _______________________________________________ Amps mai
/archives//html/Amps/2008-10/msg00128.html (8,743 bytes)

57. [Amps] A small Amplifier query (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Sun, 16 Nov 2008 10:42:35 -0800 (PST)
I've been slowly working on a curious project where I want to drive a 4-400A in Class C over the range of 1.8-30MHz from a solid 1 watt at 50 ohms (broadband solid state source). Given the relatively
/archives//html/Amps/2008-11/msg00165.html (7,422 bytes)

58. Re: [Amps] Strange relay problem Alpha 76 (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Mon, 17 Nov 2008 08:10:45 -0800 (PST)
Hi Carl, Perhaps, a shorted turn? 73 & Good morning, Marv WC6W http://wc6w.50webs.com/ _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.co
/archives//html/Amps/2008-11/msg00174.html (8,257 bytes)

59. Re: [Amps] Pi-Net tank bandswitch question (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Sat, 29 Nov 2008 11:42:54 -0800 (PST)
Hi Charlie, If you connect the switch common to the high impedance end of the tank you'll add all the stray capacitance of the unused portion of the coil to the plate C. Just what you are trying to a
/archives//html/Amps/2008-11/msg00245.html (7,878 bytes)

60. Re: [Amps] 2-4CX1000A amp (score: 1)
Author: Radio WC6W <wc6w_amps@yahoo.com>
Date: Wed, 17 Dec 2008 10:01:31 -0800 (PST)
Hi Allan, Here are some old runs from my Pi-L Basic program at 1000 ohms plate impedance which should be just about right for a pair of those tubes. This program shows all the extremes at the band ed
/archives//html/Amps/2008-12/msg00245.html (18,121 bytes)


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