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81. Re: [Amps] who needs it? Henry 8K (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Fri, 19 May 2006 09:33:13 -0500
amplifier mailing list. LOL My feeling is that amps ARE necessary in our hobby. Earlier this year in Malta our DXpedition team took along an ALS-600S. Without that amp, our participation in the ARRL
/archives//html/Amps/2006-05/msg00244.html (9,701 bytes)

82. Re: [Amps] who needs it? Henry 8K (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Fri, 19 May 2006 10:22:49 -0500
I understand and agree with your comments, Peter. This reminds me of a recent contest where a ham was complaining about a station that was 30KC wide on his rig. Several other stations quickly respond
/archives//html/Amps/2006-05/msg00246.html (9,799 bytes)

83. Re: [Amps] RE : who needs it? Henry 8K (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Tue, 23 May 2006 15:31:15 -0500
John, My experience with top contest stations is similar to yours. Someone posted earlier about a percentage spread of hams using various amounts of power from QRP to illegal levels of QRO. The perce
/archives//html/Amps/2006-05/msg00293.html (10,675 bytes)

84. Re: [Amps] RE : who needs it? Henry 8K (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Wed, 24 May 2006 11:00:14 -0500
Perhaps folks tired of this rat race are looking for an alternative and are moving south. It just may be one of the reasons Houston has become a "boom town." My QTH 20 miles north of Houston was a co
/archives//html/Amps/2006-05/msg00327.html (14,278 bytes)

85. Re: [Amps] Quad Tube 4cx800 hf amp (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Fri, 26 May 2006 11:21:04 -0500
What is the efficiency of that amp? 73, Keith NM5G I strongly disagree with that advice. Harris had a large contract with the Navy to build an amp that was to be mounted deep into the bowels of ships
/archives//html/Amps/2006-05/msg00385.html (10,055 bytes)

86. Re: [Amps] New Dummy Load (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Fri, 16 Jun 2006 08:23:22 -0500
Ditto those exact words. <grin> 73, Keith NM5G Hi Craig, This must be for the hams who have so much money they don't know what to do with it? Have a great weekend! 73 Bert, VE3OBU --Original Message-
/archives//html/Amps/2006-06/msg00305.html (8,498 bytes)

87. Re: [Amps] New Dummy Load (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Fri, 16 Jun 2006 08:34:47 -0500
I have the Palstar DL5K. It is rated to handle 1.5KW for 90 seconds and 5KW for up to 30 seconds. Price is $400. It has an accurate meter too. It comes with a wall wart power supply. I modified mine
/archives//html/Amps/2006-06/msg00306.html (8,303 bytes)

88. Re: [Amps] IM distortion and such (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Mon, 26 Jun 2006 16:40:12 -0500
IMO, comparing current flow through semi-conductors and tubes is not wise. Solid state devices can avalanche while metal in a vacuum has no such characteristic that I am aware of. I think this is why
/archives//html/Amps/2006-06/msg00470.html (12,065 bytes)

89. Re: [Amps] Q and Resonance (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Wed, 28 Jun 2006 14:59:59 -0500
I suppose it is possible that a Tech could "design, test and construct transmitters and amplifiers" but I have never known one that did. This dumbing down of entry level licensees is definitely on pu
/archives//html/Amps/2006-06/msg00600.html (9,868 bytes)

90. Re: [Amps] Henry 4K-Ultra Schematic Error (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Wed, 28 Jun 2006 21:38:13 -0500
I cannot help you with your Henry amp, but so far this year I have seen more than 3500 posts on this list. I joined the list last year in mid-July and saw about 2600 posts to the end of the year. 73,
/archives//html/Amps/2006-06/msg00613.html (7,654 bytes)

91. Re: [Amps] Maximum RF output in practical application: 4-250A (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Mon, 3 Jul 2006 19:50:23 -0500
This thread has been Bogarted so far it is ridiculous. Look at the subject line again. Arguing over high fidelity SSB is silly. There is nothing wrong using high fidelity as long as no interference i
/archives//html/Amps/2006-07/msg00158.html (13,020 bytes)

92. Re: [Amps] Switching Power Supplies (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Fri, 14 Jul 2006 13:53:13 -0500
filament. What reason is there to do that? I can think of only one: lower travel weight for DXpedition use. 73, Keith NM5G _______________________________________________ Amps mailing list Amps@cont
/archives//html/Amps/2006-07/msg00387.html (8,049 bytes)

93. Re: [Amps] transformers (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Mon, 17 Jul 2006 16:51:35 -0500
I had an L4B that put out 1700W PEP as measured by an Alpha 4510 wattmeter using 150 watts drive as read on the exciter meter. The anode voltage was about 2500 as read on the L4B meter. Also, the gri
/archives//html/Amps/2006-07/msg00545.html (8,585 bytes)

94. Re: [Amps] Amps Digest, Vol 43, Issue 70 (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Tue, 18 Jul 2006 15:51:07 -0500
In the 40's and 50's we used speed of the wiper blades to determine fuel efficiency. <grin> Those days if you wanted to run mobile power you needed a dynamotor in the trunk. :) 73, Keith NM5G --Origi
/archives//html/Amps/2006-07/msg00592.html (8,978 bytes)

95. Re: [Amps] transformers (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Tue, 18 Jul 2006 20:41:17 -0500
Peter, I found the measurement error. Those currents were for 85W drive from a different exciter, and the PEP reading was 1025. I cannot find the readings for 150. I do recall that the voltage stayed
/archives//html/Amps/2006-07/msg00610.html (9,474 bytes)

96. Re: [Amps] grid fuses (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Wed, 19 Jul 2006 20:56:11 -0500
I joined this list to learn about amp design, not repair. I can see the point about not designing a fuse or limit resister in the grid circuit because it seems to be a band-aid for poor fault design.
/archives//html/Amps/2006-07/msg00654.html (9,281 bytes)

97. Re: [Amps] Radio Pricing the Third Millenium (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Sat, 22 Jul 2006 20:52:00 -0500
It all depends on your viewpoint. All the items you mentioned, excepting ham radio gear, affects just about everyone. Another item in this class is the PC most of use to participate in this discussio
/archives//html/Amps/2006-07/msg00901.html (9,428 bytes)

98. Re: [Amps] "Tubes 201" - How Vacuum Tubes Really Work (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Mon, 24 Jul 2006 21:15:46 -0500
I am totally lost on this excessive grid current discussion. If there is a resistor or fuse tied between the grid and chassis and it blows, the grid obviously has a potential above or below ground. W
/archives//html/Amps/2006-07/msg01056.html (11,720 bytes)

99. Re: [Amps] "Tubes 201" - How Vacuum Tubes Really Work (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Mon, 24 Jul 2006 22:28:56 -0500
I am not talking about AFTER the fuse blows. What current CAUSED it to blow? Thanks. Keith Keith, Since it's loose from ground, and no corcuit can be made, it hangs in space, and can only be acted up
/archives//html/Amps/2006-07/msg01062.html (11,206 bytes)

100. [Amps] Weak Amperex 3-500Z (score: 1)
Author: "Keith Dutson" <kdutson@sbcglobal.net>
Date: Fri, 28 Jul 2006 09:19:26 -0500
Last night during a weekly practice session with our ham club's small bluegrass band, one of the guys said he replaced the Amperex 3-500Z in his AL-80A. It was putting out about 400 watts CW. He repl
/archives//html/Amps/2006-07/msg01234.html (6,854 bytes)

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