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81. Re: [Amps] New Chinese linear Amplifier (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Fri, 29 Sep 2006 12:57:00 -0400
Maybe it's sold as a kit, no FCC type approval needed ? 73, Ken W2DTC . _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/list
/archives//html/Amps/2006-09/msg00364.html (7,531 bytes)

82. Re: [Amps] New FCC Amplifier Rule (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Fri, 13 Oct 2006 08:52:18 -0400
Hal's question: "Why in the Hell was 11 meters ever taken?" One reason was a lack of use. Many amateurs used crystals and the old transmitters were built with multipliers, not mixers, thus a 3.5 mHz
/archives//html/Amps/2006-10/msg00110.html (8,020 bytes)

83. [Amps] class "A" RF amp question (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Wed, 8 Nov 2006 13:41:16 -0500
If one were to build a class "A" RF tube amplifier capable of producing an AM signal of 375 watts carrier and 1500 watts PEP, what would be the plate dissipation required by the tube? (I know how stu
/archives//html/Amps/2006-11/msg00120.html (6,677 bytes)

84. Re: [Amps] class "A" RF amp question (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Wed, 8 Nov 2006 14:58:53 -0500
**In the case of my AL-1200, I drive it with a Viking II. My viking II is capable of 100% modulation at the 100 watt carrier level. I have modified my Viking II to produce variable power and when the
/archives//html/Amps/2006-11/msg00125.html (9,259 bytes)

85. Re: [Amps] class "A" RF amp question (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Wed, 8 Nov 2006 15:12:29 -0500
"If you say 50% efficiency in a class A (people can argue either side of this) You would need to heat up the shack with 3000 watts" **Would 3000 watts dissipation apply both to a 1500 watt PEP SSB si
/archives//html/Amps/2006-11/msg00126.html (8,172 bytes)

86. Re: [Amps] class "A" RF amp question (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Wed, 8 Nov 2006 23:46:07 -0500
I agree Gary. Prior to the Viking II, I did use a modified FT-101EE and got excellent audio reports. 73, Ken W2DTC -- _______________________________________________ Amps mailing list Amps@contesting
/archives//html/Amps/2006-11/msg00137.html (9,213 bytes)

87. Re: [Amps] History of AMPS (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Tue, 14 Nov 2006 14:59:02 -0500
W5CPT said: "On the Yahoo Amp Reflector I got 8 to 10 messages a day that dealt with the minutia of amp design that few Hams would consider significant to Amp Use" Interesting observation. Last week
/archives//html/Amps/2006-11/msg00170.html (8,858 bytes)

88. Re: [Amps] Class A for AM (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Wed, 15 Nov 2006 00:27:03 -0500
Wow, I had the computer off for a bunch of hours and when I logged back in there were a number of very informative answers. I thank everyone for the information, and it's causing me to do more readin
/archives//html/Amps/2006-11/msg00188.html (9,031 bytes)

89. [Amps] PS (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Mon, 22 Jan 2007 13:13:16 -0500
I saw a 160-40 meter cathode driven AB1 linear using a 3CX3000A7 with the grid at chassis ground and no tuned input. I also noticed no parasitic suppressor. At the time I forgot to inquire about stab
/archives//html/Amps/2007-01/msg00228.html (6,395 bytes)

90. [Amps] plate choke bypass caps (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Wed, 24 Jan 2007 05:58:35 -0500
I'm building a 160 meter linear. I plan on using two 90 uhy chokes in series and at right angles to one another. Do I put the bypass cap just at the B+ point or should I also bypass in the center of
/archives//html/Amps/2007-01/msg00243.html (6,320 bytes)

91. [Amps] Fw: plate choke bypass caps (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Wed, 24 Jan 2007 14:11:22 -0500
To: Harold, Bob and George who replied. Thanks very much for the advice. I will indeed ground at the 'cold end' of the two chokes. I plan on using two 2720 pfd 30KV 'miniature hockey puck' caps. I th
/archives//html/Amps/2007-01/msg00251.html (6,838 bytes)

92. Re: [Amps] PLnetwork (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Mon, 5 Feb 2007 19:23:45 -0500
"Bob W6TR said: A better idea would be to find a Gates edge wound inductor. It already has the rigidity and the mounting hardware is in place. I'm thinking of one with a 5" diameter, about 8" long."
/archives//html/Amps/2007-02/msg00065.html (7,507 bytes)

93. Re: [Amps] 1 tube or two ?? (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Sun, 11 Feb 2007 14:06:19 -0500
"running at full tilt, the two-tuber would have a whopping(!) 3 db. advantage over the single 4-1000A! That's a full half S-unit difference" That's a true statement. Interesting that in today's world
/archives//html/Amps/2007-02/msg00184.html (8,263 bytes)

94. [Amps] correct way to drive an amp with controlled carrier AM (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Fri, 24 Aug 2007 04:23:38 -0400
For linear amps, the general method is to first determine the highest possible power output by loading the amp on CW for maximum. Lets say the wattmeter shows 1200 watts for your SB-220. For AM, this
/archives//html/Amps/2007-08/msg00156.html (8,362 bytes)

95. Re: [Amps] Homebrew amplifier tube (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Wed, 9 Jan 2008 13:23:04 -0500
http://www.dailymotion.com/video/x3wrzo_fabrication-dune-lampe-triode_tech That was an amazing video. ! 73, Ken W2DTC __________________________________________________________ Ken Barber Middletown,
/archives//html/Amps/2008-01/msg00087.html (7,073 bytes)

96. Re: [Amps] re dishtronix amp (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Tue, 22 Jan 2008 13:32:43 -0500
Just think, if you were a really good professional baseball pitcher, you would only have to throw 4 pitches to afford this amp. _______________________________________________ Amps mailing list Amps@
/archives//html/Amps/2008-01/msg00144.html (7,336 bytes)

97. Re: [Amps] Step start (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Sun, 3 Feb 2008 02:15:03 -0500
Hi Patrick, Well there is nothing wrong with the concept, but I like to keep the fewest wires connected to the high voltage. I also don't need the super fast charge either, I have a 30 second startu
/archives//html/Amps/2008-02/msg00004.html (7,466 bytes)

98. [Amps] Can you identify this tube ?? (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Sat, 16 Feb 2008 03:51:09 -0500
http://w2dtc.com/w2dtc-mystery-tube-page.htm _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2008-02/msg00102.html (6,373 bytes)

99. Re: [Amps] Can you identify this tube ?? (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Sat, 16 Feb 2008 19:13:58 -0500
John, Yes, several others agree with you on the tube being an X-ray tube. Thanks to you and others who replied. 73, Ken W2DTC -- _______________________________________________ Amps mailing list Amps
/archives//html/Amps/2008-02/msg00108.html (7,505 bytes)

100. Re: [Amps] Needed Info (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Thu, 21 Feb 2008 13:25:25 -0500
"I thought the "3000" part of the tube nomenclature indicated 3000 watt dissipation" **In most cases this is true, The 3CX3000F7 (4000 w) and the 4CX150G (250 w) are at least two that differ. "The os
/archives//html/Amps/2008-02/msg00146.html (8,078 bytes)

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