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1. [AMPS] Bird Wattmeter Error on all bands (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Mon, 01 Jun 1998 09:26:23 +0000; To: <amps@contesting.com> The standard Bird 43 meter meter and slug has a published error of plus or minus 5% of full scale anywhere on the scale. (That's why a Bird often shows incorrect SWR reading; /archives//html/Amps/1998-06/msg00004.html (8,134 bytes)
2. [AMPS] No 24 MHz (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Tue, 02 Jun 1998 03:53:21 +0000; To: <amps@contesting.com> Hi Dick, The problem isn't one of absorbing power right *at* resonance, that almost always only occurs when the choke is only very *near* resonance... or if the choke Q is s; /archives//html/Amps/1998-06/msg00020.html (8,642 bytes)
3. [AMPS] Non-inductive resistors (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Tue, 02 Jun 1998 23:49:43 +0000; I just received sample 5 watt metal film resistors from Mouser, as per the conversation with Carl. The measured inductance of two 51 ohm resistors with nearly zero lead length was 47.1 nH and 49.3 nH; /archives//html/Amps/1998-06/msg00033.html (7,985 bytes)
4. [AMPS] Non-inductive resistors (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Wed, 03 Jun 1998 11:18:25 +0000; To: <amps@contesting.com> Nope. The turns are .150 inch wide, and only fill a .68 inch long area .278 inches in diameter. Being so wide, it's difficult to count the exact turns because the starting a; /archives//html/Amps/1998-06/msg00042.html (8,887 bytes)
5. [AMPS] Non-inductive resistors (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Wed, 03 Jun 1998 22:55:15 +0000; To: <amps@contesting.com> Good day Ian. Gosh, what luck! ;-) All I usually do is scrape the outside off and look at the guts. If it's a coil with multiple turns, I don't use it as a suppressor resist; /archives//html/Amps/1998-06/msg00049.html (8,704 bytes)
6. [AMPS] Still no 24MHz (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Fri, 05 Jun 1998 09:51:18 +0000; To: <amps@contesting.com> Hi Alek Try this test. Drive the output port backwards with a bit of RF watching SWR, and try tuning ONLY the tank (choke disconnected) for low SWR (with the anode terminate; /archives//html/Amps/1998-06/msg00067.html (7,709 bytes)
7. [AMPS] pi vs. t tuned input (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Wed, 10 Jun 1998 10:10:51 +0000; To: <amps@contesting.com> Absolutely. When conduction angle is less than 360 degrees the tube generates harmonics in the cathode. In order to maintain efficiency and improve IMD, the cathode MUST see; /archives//html/Amps/1998-06/msg00136.html (8,585 bytes)
8. [AMPS] t v. pi (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Thu, 11 Jun 1998 05:48:25 +0000; That might be true in some cases. I recently measured IMD on a 73 material for an antenna question and found heating occured long before IMD became a problem. But if the cicuit is a resonant high Q; /archives//html/Amps/1998-06/msg00147.html (7,270 bytes)
9. [AMPS] Ip:Ig (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Fri, 12 Jun 1998 07:18:55 +0000; To: <amps@contesting.com> There is no standard, it depends on many factors. That's because Ig can go all over the place depending on the application. With light loading the same amount of Ig will cau; /archives//html/Amps/1998-06/msg00149.html (8,478 bytes)
10. [AMPS] Ip:Ig (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Fri, 12 Jun 1998 22:55:59 +0000; To: <amps@contesting.com> Hi Vic, That was my recollection of what the manual says. Thanks for confirming that, since I no longer have a copy of the older manuals. Certain people can't read well, whe; /archives//html/Amps/1998-06/msg00157.html (7,692 bytes)
11. [AMPS] Bird 2500H dozen slug test (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Mon, 15 Jun 1998 16:10:04 +0000; To: <amps@contesting.com> Bird publishes tolerances measured against a caloric standard. How do your results compare to their + or - 5% of full scale anywhere on the scale for slugs and a model 43? I; /archives//html/Amps/1998-06/msg00163.html (7,608 bytes)
12. [AMPS] Re: (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Tue, 12 May 1998 23:06:32 +0000; To: <amps@contesting.com> Hi Rich, And what are you? Do you really think name calling furthers your technical position? Can you copy, and post that comment? All we have is "your word". Not true Rich.; /archives//html/Amps/1998-05/msg00191.html (10,241 bytes)
13. [AMPS] Re: Parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Tue, 12 May 1998 23:06:33 +0000; To: <amps@contesting.com> Hi Jon, Absolutely no difference at all for VHF Jon. The tuning cap looks like a very low impedance, the tank inductor and leads a high series impedance, and the loading cap; /archives//html/Amps/1998-05/msg00192.html (11,127 bytes)
14. [AMPS] Re: Parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Wed, 13 May 1998 10:00:04 +0000; To: <amps@contesting.com> You recall incorrectly. The only resonance I found below several hundreds of MHz was a series resonance, where impedance went almost to zero. If the capacitor had a parallel; /archives//html/Amps/1998-05/msg00200.html (10,355 bytes)
15. [AMPS] Re: (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Wed, 13 May 1998 10:00:03 +0000; To: <amps@contesting.com> For those sick of name calling, skip to the end. There is a technical point Rich made that plainly indicates he believes the best suppressor is no suppressor at all. For tho; /archives//html/Amps/1998-05/msg00201.html (14,705 bytes)
16. [AMPS] Re: Parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Wed, 13 May 1998 23:23:33 +0000; To: <amps@contesting.com> and N4ZR Pete replied: Rich claimed a K5 had parasitics in his 922 because "mistuning and misloading can not cause excess tank voltage or arcs. The K5 showed up and correct; /archives//html/Amps/1998-05/msg00216.html (10,155 bytes)
17. [AMPS] Re: Parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Thu, 14 May 1998 00:40:58 +0000; To: <amps@contesting.com> Hello Jon, Very good Jon. Nothing at all, except the load presented by the tank. The reason the HF signal can swing so freely is the tank has high HF Q and is resonant. For; /archives//html/Amps/1998-05/msg00220.html (13,330 bytes)
18. [AMPS] Re: Parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Thu, 14 May 1998 00:40:58 +0000; To: <amps@contesting.com> <snip> Hi Carl, I'll respond to any technical question. Do you have one? 73, Tom W8JI w8ji.tom@MCIONE.com -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: a; /archives//html/Amps/1998-05/msg00221.html (8,088 bytes)
19. [AMPS] Re: Parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Thu, 14 May 1998 09:48:03 +0000; To: <amps@contesting.com> Yes, so far as the PA is concerned they are identical. That's why I said "mistuning or misloading". During a load fault, the PA is no longer properly matched to the load. If; /archives//html/Amps/1998-05/msg00226.html (10,848 bytes)
20. [AMPS] The Grate Debate & Me (long) (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Thu, 14 May 1998 09:48:03 +0000; Hi Larry, Was there a technical point or issue you wanted to discuss? 73, Tom W8JI w8ji.tom@MCIONE.com -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administra; /archives//html/Amps/1998-05/msg00227.html (6,988 bytes)

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