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Total 254 documents matching your query.

61. Re: [Amps] QRP amp, new (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Wed, 13 Oct 2010 07:13:41 +0800
It use MRF175GU, 24V power supply should be better.A Chinese ham design and built it. 73!Hsu -- Original Message -- From: "Craig Brammer" <craigbrammer@sbcglobal.net> To: <amps@contesting.com> Sent:
/archives//html/Amps/2010-10/msg00209.html (7,294 bytes)

62. [Amps] cathode driven 4CX250B and super cathode driven (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Wed, 13 Oct 2010 19:35:53 +0800
Please view http://home.comcast.net/~k7rld/4cx250bamplifier.htm, Anyone have built it?This amp's sch have been modified, in origional schematic, the R1 and R2 contac with cathode, but this contact to
/archives//html/Amps/2010-10/msg00219.html (7,221 bytes)

63. Re: [Amps] cathode driven 4CX250B and super cathode driven (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Wed, 13 Oct 2010 19:56:48 +0800
Another example, 73 magazine March 1973 P50-54 "The ample amplifier".a pair 4CX250B in G-G configation, the control grid contact to cathode and the screen grid to ground. the builder point out that t
/archives//html/Amps/2010-10/msg00220.html (7,831 bytes)

64. Re: [Amps] New 2 PA design (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Sat, 16 Oct 2010 06:19:00 +0800
If use ARF1510/11 worked in SEPP or ARF1505 in P-P configattion, transformerless are possible, only needs a PFC unit.My teacher in the university, built a PFC unit what the out put volt below the inp
/archives//html/Amps/2010-10/msg00246.html (8,012 bytes)

65. Re: [Amps] New 2 PA design (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Sat, 16 Oct 2010 06:21:08 +0800
I remnember that APT(now microsemi) have an AN, it is transformerless design, Class C ,1kW output. -- Original Message -- From: "Hsu" <hsu4qro@gmail.com> To: "Baruch Zilbershatz" <4z4rb@bezeqint.net>
/archives//html/Amps/2010-10/msg00247.html (8,148 bytes)

66. Re: [Amps] New 2 PA design (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Sat, 16 Oct 2010 06:27:14 +0800
http://www.microsemi.com/micnotes/APT9502.pdf and http://www.microsemi.com/micnotes/APT9701.pdf -- Original Message -- From: "Hsu" <hsu4qro@gmail.com> To: "Baruch Zilbershatz" <4z4rb@bezeqint.net> Cc
/archives//html/Amps/2010-10/msg00248.html (8,812 bytes)

67. Re: [Amps] New 2 PA design (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Sat, 16 Oct 2010 06:48:09 +0800
Could you send me that German guy's detail? 73!Hsu -- Original Message -- From: "Baruch Zilbershatz" <4z4rb@bezeqint.net> To: "'Hsu'" <hsu4qro@gmail.com> Cc: <amps@contesting.com> Sent: Saturday, Oct
/archives//html/Amps/2010-10/msg00250.html (9,959 bytes)

68. [Amps] OT clean the shack I (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Mon, 18 Oct 2010 15:41:01 +0800
I just set up my shack in my attic, three years hard work! I need to clean my shack in succession now.I have some parts and equipment for sale.The first: a very good IC-751A ,with a HM36 microphone.
/archives//html/Amps/2010-10/msg00276.html (8,085 bytes)

69. Re: [Amps] AL1200, high input swr, all bands (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Mon, 18 Oct 2010 15:55:47 +0800
In 2000, My TS-830s allmost kill me due to this problem. The relay seems have problem and 6146B flash over,when the problems solved,I made a big mistake, when it power on, I pull the upper cover from
/archives//html/Amps/2010-10/msg00277.html (10,265 bytes)

70. Re: [Amps] OT clean the shack I (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Mon, 18 Oct 2010 16:06:09 +0800
You can make an offer too. -- Original Message -- From: Hsu To: ham_amplifiers@yahoogroups.com Cc: amps@contesting.com Sent: Monday, October 18, 2010 3:41 PM Subject: OT clean the shack I I just set
/archives//html/Amps/2010-10/msg00278.html (8,223 bytes)

71. Re: [Amps] 4- 572's (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Wed, 20 Oct 2010 14:00:50 +0800
_______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2010-10/msg00320.html (8,056 bytes)

72. [Amps] cleaning the shack II (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Fri, 22 Oct 2010 14:11:49 +0800
A Kenwood TL922 amplifier,100% new, YES 100%!with origional carton!I jsut test it for only ten minutes,ALL OK!Maybe you will not Find so new amplifier in the world! I ask $4000 or best offer.I have t
/archives//html/Amps/2010-10/msg00349.html (7,267 bytes)

73. Re: [Amps] 8877 Pulls (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Tue, 26 Oct 2010 11:22:55 +0800
I have a pair brand new 8877, I ask $400/ea.If you interested in it, you can make an offer. 73!Hsu -- Original Message -- From: "Doug Renwick" <ve5ra@sasktel.net> To: "'Pat Poirier'" <hkman@comcast.n
/archives//html/Amps/2010-10/msg00370.html (8,429 bytes)

74. Re: [Amps] 8877 Pulls (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Tue, 26 Oct 2010 11:25:49 +0800
The tubes have been test in a AL1500, 100% OK. If with any problem, I pay the shipping to return! _______________________________________________ Amps mailing list Amps@contesting.com http://lists.co
/archives//html/Amps/2010-10/msg00371.html (7,929 bytes)

75. [Amps] 4CX250B/1000A Grid driven VS GG (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Wed, 3 Nov 2010 05:09:33 +0800
Who had measure 4CX250B's or 4CX1000A's 3rd IMD order in gird driven and cathode driven?There are few amplifier using this configation, only THP HL-1K and Collins 30S-1.Which is better?I had post sim
/archives//html/Amps/2010-11/msg00014.html (6,856 bytes)

76. [Amps] our amplifier in 2010 CQWW (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Tue, 9 Nov 2010 06:01:45 +0800
http://www.56.com/u40/v_NTYxNjg5MzM.html http://www.56.com/u73/v_NTYxNzEyNTQ.html http://www.56.com/u78/v_NTYxNzM3MjM.html _______________________________________________ Amps mailing list Amps@conte
/archives//html/Amps/2010-11/msg00054.html (7,152 bytes)

77. Re: [Amps] our amplifier in 2010 CQWW (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Tue, 9 Nov 2010 11:18:02 +0800
Chinese regulation is below 500W, but in contest , the club station can apply more power to SRRC. 73!Hsu -- Original Message -- From: "Jim W7RY" <w7ry@inbox.com> To: "AMPS" <amps@contesting.com> Sent
/archives//html/Amps/2010-11/msg00065.html (10,647 bytes)

78. Re: [Amps] our amplifier in 2010 CQWW (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Tue, 9 Nov 2010 12:47:58 +0800
You are right Jim. But as I know, the most buyers of Emtron DX2-5, OM2500/3500 and THP HL5KFX are contester :D 73!Hsu _______________________________________________ Amps mailing list Amps@contesting
/archives//html/Amps/2010-11/msg00072.html (12,499 bytes)

79. Re: [Amps] our amplifier in 2010 CQWW (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Thu, 11 Nov 2010 20:53:11 +0800
Gents, I think we can stop this topic.I show this video just for our amplifier,I'm Not a contester,Not a member of B7P too.The B7P just is our product buyer. Origional video were not send by myself t
/archives//html/Amps/2010-11/msg00153.html (8,414 bytes)

80. Re: [Amps] 2010 ARRL Handbook (score: 1)
Author: "Hsu" <hsu4qro@gmail.com>
Date: Sat, 13 Nov 2010 08:52:01 +0800
What new article about RF amplifier in handbook 2011? 73!Hsu -- Original Message -- From: "Jim W7RY" <w7ry@inbox.com> To: <kb5gt@cableone.net>; <amps@contesting.com> Cc: <kb5gt@arrl.net> Sent: Saturd
/archives//html/Amps/2010-11/msg00178.html (9,590 bytes)

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