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61. [Amps] Non-linear subharmonics was: Nonsense, AL-1500 parasitic (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 22 May 2002 00:09:01 -0400; It is especially interesting now that Dave says he duplicated the problem with diodes. I have never been able to generate a submultiple of a signal with an form of non-linear system, including satur; /archives//html/Amps/2002-05/msg00346.html (10,272 bytes)
62. [Amps] Subharmonic (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 22 May 2002 06:00:09 -0400; A major point of all this is whether the effect is common or even occasionally occurs at HF, or even is possible to occur without special circuitry. In over 30 years, I've never seen it happen. I've; /archives//html/Amps/2002-05/msg00349.html (8,473 bytes)
63. [Amps] Subharmonic (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 22 May 2002 09:28:46 -0400; Hi Andy, That is the typical sound and description of a parasitic that is phase locked at half of the operating frequency. It is somewhat common in some systems that have shortfalls in design or desi; /archives//html/Amps/2002-05/msg00351.html (11,453 bytes)
64. [Amps] Subharmonic (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 23 May 2002 02:06:38 -0400; Well Steve.....that is how I regularly measure or test equipment. As a matter of fact, every new design is tested with wide variations in load impedance, supply voltage, and temperature.73, Tom W8JI; /archives//html/Amps/2002-05/msg00360.html (7,553 bytes)
65. [Amps] Using door knob caps as padders/blockers (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 23 May 2002 02:06:40 -0400; The doorknob capacitor in the Heath is within its current ratings, assuming you know how to read manufacturers data. I suspect it might be within the rating in the ETO also. The problem is ceramic c; /archives//html/Amps/2002-05/msg00361.html (9,560 bytes)
66. [Amps] hv resistors (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 23 May 2002 02:06:41 -0400; I'd just order some new 50 cent HV rated resistors and place them in series. It's very easy to find 1kV or higher voltage rating multiplier resistors that are reliable and stable, and build a 1% tol; /archives//html/Amps/2002-05/msg00362.html (7,814 bytes)
67. [Amps] Subharmonic (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 23 May 2002 02:06:37 -0400; Doesn't seem to work. I just get a blank page. Rest of site is OK.73, Tom W8JI W8JI@contesting.com; /archives//html/Amps/2002-05/msg00363.html (7,225 bytes)
68. [Amps] Using door knob caps as padders/blockers (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 23 May 2002 10:42:52 -0400; Hi Phil, First, Ameritron does not use mica's in the tank of higher power amplifiers. Never has, probably never will. They switched to ceramic chip capacitors because the doorknobs they had used for; /archives//html/Amps/2002-05/msg00380.html (10,525 bytes)
69. [Amps] hv resistors (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 23 May 2002 10:42:51 -0400; IRC GS-3 series are high reliability temperature stable 1000 volt devices that give excellent life and reliability in HV multipliers, and they manufacture even larger 1% HV resistors. Regular cheap; /archives//html/Amps/2002-05/msg00381.html (7,936 bytes)
70. [Amps] Using door knob caps as padders/blockers (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 23 May 2002 17:29:06 -0400; Initial parts purchases of the SB1000 were from Ameritron, so the first 500 or so SB1000's should have no or minimal drift problems. Some time after that, Heath purchasing selected their own vendor.; /archives//html/Amps/2002-05/msg00401.html (8,686 bytes)
71. [Amps] Mica capacitors - friend or foe? (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 24 May 2002 22:05:52 -0400; The only problem with mica caps is the expense for HV high-current units with low lead inductance compared to ceramic types. Otherwise, I'd use 'em.73, Tom W8JI W8JI@contesting.com; /archives//html/Amps/2002-05/msg00423.html (7,610 bytes)
72. [Amps] Mica capacitors - Round 2 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sat, 25 May 2002 21:54:09 -0400; The method of determining ratings are defined in the technical literature. For example, the "current rating" specified by HEC and Jennings is for a certain starting ambient temperature, a certain he; /archives//html/Amps/2002-05/msg00435.html (8,681 bytes)
73. [Amps] Ameritron manuals (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 30 May 2002 10:04:02 -0400; Only one person responded, and he said he ordered a manual via the web page. Based on that, I checked and found the webmaster (Ameritron does not have direct access to those downloads) as not checked; /archives//html/Amps/2002-05/msg00471.html (7,753 bytes)
74. [Amps] Transformer oil? (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 30 May 2002 10:04:11 -0400; I've heard the best way to dispose of PCB oil is to mix it in with the gasoline in your car.73, Tom W8JI W8JI@contesting.com; /archives//html/Amps/2002-05/msg00472.html (7,893 bytes)
75. [Amps] Ameritron manuals (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 31 May 2002 05:58:16 -0400; How we think a system works or want a system to work is often different than how it really works, especially with Internet. I'm not offering any comments on how it should work, I'm just saying how i; /archives//html/Amps/2002-05/msg00479.html (7,898 bytes)
76. [Amps] Re: [Amps] Bird® 43 Manua (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 1 Apr 2002 13:26:13 -0500; That is EXACTLY what I am saying, because that is precisely how the meter works. What is particularly disappointing is some of the most vocal critics on the RRAA forum (no one present in this forum); /archives//html/Amps/2002-04/msg00018.html (10,796 bytes)
77. [Amps] IMD vs. Vcc (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 1 Apr 2002 16:28:40 -0500; There are multiple rules that apply. First, you can not have any product or byproduct of modulation that extends outside the authorized band for that mode and class of license. Second, you can not c; /archives//html/Amps/2002-04/msg00021.html (8,331 bytes)
78. [Amps] Re: [Amps] Bird® 43 Manua (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 1 Apr 2002 16:28:40 -0500; Respectfully Ron, that simply is not true in the least. If it were true, the meter could not possibly have directivity. Turning the slug around would result in the same reading. The reason is simple; /archives//html/Amps/2002-04/msg00022.html (9,137 bytes)
79. [Amps] Power/VSWR readings (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 3 Apr 2002 07:27:11 -0500; Sometimes 20dB or so is close enough to perfect. 20dB is 1%. That is not a significant error when the meter itself is 5% or so of full scale anywhere on the scale. Read the measurements I posted, or; /archives//html/Amps/2002-04/msg00108.html (7,104 bytes)
80. [Amps] Re: [Amps] Re: [Amps] Bird® 43 Manua (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 3 Apr 2002 07:27:11 -0500; You are not the one who needs help. <snip> Except for that very last sentence Bill. The meter works VERY well for measuring power as long as you subtract the reflected power from the forward power,; /archives//html/Amps/2002-04/msg00109.html (10,466 bytes)

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