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81. [AMPS] Two XFMR in parallel (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Thu, 18 Jan 2001 11:01:52 -0500; True enough Tom, but Dynamic Regulation isn't the point of the discussion. The method allows proper load sharing (with minimized circulating current between windings) of two dissimilar transformer wi; /archives//html/Amps/2001-01/msg00465.html (9,908 bytes)
82. [AMPS] Re: Two XFMRs Parallel... (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Thu, 18 Jan 2001 16:55:27 -0500; No. Testing for phase is easy Jim. It only takes a few minutes to determine the correct phasing of multiple windings, whether they're on the same core or not. But you're right. Ensuring that the wind; /archives//html/Amps/2001-01/msg00478.html (10,381 bytes)
83. [AMPS] Two XFMR in parallel (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Thu, 18 Jan 2001 16:59:02 -0500; Oh, no argument Tom. It's just that original question was " can I combine these two transformers....." Phil -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administ; /archives//html/Amps/2001-01/msg00479.html (9,258 bytes)
84. [AMPS] Building AMP with four valves in parallel (4-250) -any guidance ? (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Sat, 09 Dec 2000 08:34:13 -0500; I wouldn't be surprised if some of the low efficiency problem is due to the design of the output tank network. Get a copy of Ian White's Pi network calc spreadsheet from his website and go through it; /archives//html/Amps/2000-12/msg00148.html (10,152 bytes)
85. [AMPS] Ian White's URL (Pi/PI-L spreadsheet) (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Sat, 09 Dec 2000 09:51:00 -0500; For those that asked, here's the URL for Ian White's excellent web site : http://www.ifwtech.com/g3sek/index.htm The Pi/Pi-L spreadsheet download is about 3/4 the way down the main page. Phil -- FAQ; /archives//html/Amps/2000-12/msg00151.html (7,028 bytes)
86. [AMPS] Choke series resonance clarification (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Sat, 09 Dec 2000 15:33:01 -0500; Three very informative posts Tom. Thanks. Phil -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-; /archives//html/Amps/2000-12/msg00161.html (8,294 bytes)
87. [AMPS] Can you identify this thing ? (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Tue, 12 Dec 2000 20:36:50 -0500; The following link will take you to my website : http://www.vaxxine.com/phil/scopes/test.htm Click on the link : "What the hell is this" , and see if you recognize it. Thanks Phil -- FAQ on WWW: http; /archives//html/Amps/2000-12/msg00207.html (6,688 bytes)
88. [AMPS] not the real story... (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Sat, 16 Dec 2000 14:59:24 -0500; Similar thoughts came to my mind too Skipp. This here John fella' - well he's just a yung 'un. Good pictures John. Thanks for sharing them. Phil -- FAQ on WWW: http://www.contesting.com/FAQ/amps Subm; /archives//html/Amps/2000-12/msg00246.html (8,545 bytes)
89. [AMPS] Parallel coaxial feedline For 1/2 CharacteristicImpedance (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Sun, 17 Dec 2000 00:16:00 -0500; You may not be the first Billy. This idea rings a bell. I believe VE2CV (Jack Belrose) wrote an article about this very thing in QST just a few years ago. I'll have to track down the article to be su; /archives//html/Amps/2000-12/msg00254.html (11,329 bytes)
90. [AMPS] Parallel coaxial feedline For 1/2 CharacteristicImpedance (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Sun, 17 Dec 2000 11:52:03 -0500; Phil To: <amps@contesting.com> (Jack Belrose) wrote an article about this very thing in QST just a few years ago. I'll have to track down the article to be sure we're talking about the same thing. --; /archives//html/Amps/2000-12/msg00262.html (8,075 bytes)
91. [AMPS] ARRL CD rom question (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Sun, 17 Dec 2000 19:37:14 -0500; If anyone has purchased any of the ARRL's CD rom collections of QST or QEX, can you please comment on the quality of the files on the CDs. Are the files pdfs, jpgs, or what ? Thanks Phil -- FAQ on WW; /archives//html/Amps/2000-12/msg00263.html (6,914 bytes)
92. [AMPS] Advice On Homebrewing Chassis Please (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Tue, 26 Dec 2000 18:41:12 -0500; Note that there is good article from QST on bending metal. The article is available for download in the "TIS" section (Technical Information Service) on ARRL's website. I just downloaded it a few day; /archives//html/Amps/2000-12/msg00322.html (10,749 bytes)
93. [AMPS] Opinions on HP 675 & 676 (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Sun, 12 Nov 2000 19:56:29 -0500; I need opinions on the HP 675 10 Khz - 32 Mhz CW sweep generator, and the matching HP 676 Tracking Detector. I have no experience with sweepers but I've always wanted one for experimenting with tuned; /archives//html/Amps/2000-11/msg00115.html (6,863 bytes)
94. [AMPS] Max-con, magic antenna box info requested (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Sun, 19 Nov 2000 15:09:25 -0500; Skipp, I think the "magic" in that thing came from a swamping resistor or swamping network across the terminals. I recall the main and only selling feature of that thing was "low swr across any band; /archives//html/Amps/2000-11/msg00223.html (9,680 bytes)
95. [AMPS] 2nd 8877 test result (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Tue, 03 Oct 2000 21:30:31 -0400; Maybe it really isn't dead at all. Or maybe it's just plain pooped. What's the expected life span of an 8877 if operated within recommended patterns. Phil -- FAQ on WWW: http://www.contesting.com/FAQ; /archives//html/Amps/2000-10/msg00078.html (7,896 bytes)
96. repost - Re: [AMPS] 2nd 8877 test result (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Tue, 03 Oct 2000 21:37:28 -0400; Maybe it really isn't dead at all. Or maybe it's just plain pooped. What's the expected life span of an 8877 if operated within recommended [patterns]. - sorry, I meant guidelines. My daughter was ta; /archives//html/Amps/2000-10/msg00079.html (8,385 bytes)
97. [AMPS] Amp article CD (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Fri, 06 Oct 2000 18:15:15 -0400; It gets my vote. I have a file folder full of amp articles. Maybe we should post lists of articles so we can see who has what. Phil -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps; /archives//html/Amps/2000-10/msg00108.html (9,305 bytes)
98. [AMPS] Switches (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Thu, 12 Oct 2000 08:29:17 -0400; What about using a longer shaft, more wafers, larger indexing angle, and splitting up the bands between the front set of wafers and the back set of wafers. I know there will more wiring but it will h; /archives//html/Amps/2000-10/msg00222.html (9,302 bytes)
99. [AMPS] 814 AMP (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Mon, 16 Oct 2000 18:33:32 -0400; Anybody ever build a 'nostalgia' amp using one or two or more 814's ? Something for sideband or CW (Not AM). I seem to keep turning up these old tubes. Thanks Phil -- FAQ on WWW: http://www.contestin; /archives//html/Amps/2000-10/msg00406.html (6,916 bytes)
100. [AMPS] 814 AMP (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Tue, 17 Oct 2000 07:37:04 -0400; Yep, Mike's got it! The 814 is very similar in size and shape to an 813; perhaps a quarter inch taller and just slightly smaller diameter than the 813. It is a pentode, or tetrode with beam forming p; /archives//html/Amps/2000-10/msg00436.html (8,738 bytes)

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