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21. [AMPS] Re: tuned input (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Thu, 23 Nov 2000 08:58:21 -0600; This is a multi-part message in MIME format. --=_NextPart_000_004C_01C0552B.87E72100 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Asked, "Should you al; /archives//html/Amps/2000-11/msg00336.html (8,799 bytes)
22. [AMPS] Re: Circuit for measuring RF voltage... (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Thu, 23 Nov 2000 09:21:04 -0600; About, "Hi All, I have a large dry dummy load and need to add some circuit to measure DC voltage for radio work. My question, does anyone have a simple circuit to add to the dummy load to produce a m; /archives//html/Amps/2000-11/msg00337.html (8,470 bytes)
23. [AMPS] Re: Circuit for measuring RF voltage... (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Sun, 26 Nov 2000 09:19:29 -0600; "Any indirect measurement, i.e. evaluating RMS power through a voltage, needs calibration." Hmmm, The method I use (a 6AL5 with capacitor input filter at its cathode) delivers an accurate peak DC vol; /archives//html/Amps/2000-11/msg00374.html (8,367 bytes)
24. [AMPS] Re: Circuit for measuring RF voltage... (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Mon, 27 Nov 2000 14:08:57 -0600; Sheesh! Roy K6XK corresponding with the so a 3% there's mismatch For error. A 1.02:1 problem. HP from efficiency. -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Ad; /archives//html/Amps/2000-11/msg00387.html (8,734 bytes)
25. [AMPS] Re: SB-200 Retrofit (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Wed, 4 Oct 2000 08:02:17 -0500; This is a multi-part message in MIME format. --=_NextPart_000_004B_01C02DD9.69D82520 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Rich, My 22nd Edition; /archives//html/Amps/2000-10/msg00085.html (8,284 bytes)
26. Fw: [AMPS] Plate Choke (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Sat, 28 Oct 2000 11:56:39 -0500; Hi Chuck--you asked, "Is the lowest-frequency self-resonance a "parallel" resonance, i.e., such that the impedance of the choke is very high?" YES "Is power-amplifier operation at a parallel-resonant; /archives//html/Amps/2000-10/msg00636.html (7,382 bytes)
27. [AMPS] Re: latching relay (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Tue, 5 Sep 2000 10:17:01 -0500; This is a multi-part message in MIME format. --=_NextPart_000_0009_01C01722.6E2ACEC0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable About, "What is a lat; /archives//html/Amps/2000-09/msg00100.html (8,623 bytes)
28. [AMPS] Re: Peter Dahl site... (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Wed, 2 Aug 2000 08:11:51 -0500; www.pwdahl.com 73, Roy K6XK Iowa -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contestin; /archives//html/Amps/2000-08/msg00021.html (6,411 bytes)
29. [AMPS] Re: single tube vs. twins (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Fri, 11 Aug 2000 09:51:46 -0500; 'What the others have said' plus there's no concern about unequal load sharing, or of one tube flat topping ahead of the the other. 73, Roy K6XK -- FAQ on WWW: http://www.contesting.com/FAQ/amps Subm; /archives//html/Amps/2000-08/msg00203.html (6,529 bytes)
30. [AMPS] Re: Knife switch (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Fri, 25 Aug 2000 09:59:01 -0500; Tom inquired, "I need a heavy duty dpdt knife switch. Anyone know where...?" Try Fair Radio Sales. They had a huge one in their recent ads. 73, Roy K6XK -- FAQ on WWW: http://www.contesting.com/FAQ/a; /archives//html/Amps/2000-08/msg00402.html (6,499 bytes)
31. [AMPS] Re: 811 question (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Wed, 14 Jun 2000 09:33:20 -0500; This is a multi-part message in MIME format. --=_NextPart_000_0032_01BFD5E3.93E95C60 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable About, "i was wonderi; /archives//html/Amps/2000-06/msg00175.html (8,887 bytes)
32. [AMPS] Re: HV parasitic plate choke (?) (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Thu, 6 Apr 2000 11:40:14 -0500; "SELL: Heavy duty, HV parasitic plate choke wound on 1" solid porcelain...etc." What is a HV 'p a r a s i t i c' choke? Hope not!? K6XK -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissio; /archives//html/Amps/2000-04/msg00038.html (6,991 bytes)
33. [AMPS] Re: RF choke forms (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Sat, 15 Jan 2000 17:26:50 -0600; About, "The other problem is that RF chokes and loading coils can be subject to direct arcing between turns." Hmmm, Most modern "enameled style" magnet wire is rated at 2 kV insulation. But lets take; /archives//html/Amps/2000-01/msg00341.html (7,412 bytes)
34. [AMPS] Re: RF choke forms (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Sun, 16 Jan 2000 10:51:54 -0600; Where did I ever say, :-( "3 kV DC across the plate choke? I think you'll have other, more expensive worries before that became a problem." ?? I did mention having 3 kV on the plate in my example, an; /archives//html/Amps/2000-01/msg00358.html (7,084 bytes)
35. [AMPS] Re: Tank coils (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Tue, 18 Jan 2000 17:06:34 -0600; "By the way, what is the easiest way to neatly wind a coil from 1/4" copper tubing to say 1 1/2' dia. I have heard that to heat it up first, then quickly cool it will soften it and make it easier to; /archives//html/Amps/2000-01/msg00400.html (7,635 bytes)
36. [AMPS] Re: 4 to 1 un-un at the tank output... (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Fri, 21 Jan 2000 10:22:57 -0600; Re: "A stack of three large yellow powdered iron torroids wound with #10 awg wire will loaf @ the 5kw level." We're talking about using a 4 to 1 un-un transmission line transformer on this thread. Th; /archives//html/Amps/2000-01/msg00461.html (7,222 bytes)
37. [AMPS] Re: 4 to 1 un-un at the tank output (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Fri, 21 Jan 2000 15:14:41 -0600; Rich insists, "For this application, Type 61 ferrite is rated by the manufacturer at 10MHz max. Using type 61 (mu=c.125) material at 14MHz, sinewave distortion can easily be seen on an oscilloscope.; /archives//html/Amps/2000-01/msg00468.html (7,333 bytes)
38. [AMPS] Re: 4 to 1 un-un at tank output (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Fri, 21 Jan 2000 16:44:11 -0600; Sort of about, "Amidon is Not a manufacturer of ferrite material." The controlling factor here concerning distortion and harmonics is that a true transmission line xfmr is Not Flux Coupled like a con; /archives//html/Amps/2000-01/msg00470.html (7,553 bytes)
39. [AMPS] Re: 4 to 1... (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Fri, 21 Jan 2000 16:49:51 -0600; Sorry for the typo, "No Distortion created in this xmtr." Should be: "in this xfmr." Roy -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrative requests; /archives//html/Amps/2000-01/msg00471.html (6,567 bytes)
40. [AMPS] Re: Blue flashes (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Mon, 24 Jan 2000 11:21:28 -0600; Asked, "BUT when I tested the amp I noticed that in one of the 572B's there is a small blue flash on the glass when amp is drawing current, it comes with the dits and the daahs when transmitting CW.; /archives//html/Amps/2000-01/msg00507.html (6,956 bytes)

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