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81. [Amps] HV switch-mode power supply (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Thu, 21 May 2009 15:32:07 +0000 (UTC); Hi Larry, yes, it does seem there is some nice interest in SMPS for HV . Below are a few of my observations. 73, Paul (KG7HF) -- Message: 5 Date: Wed, 20 May 2009 14:45:37 -0700 From: Larry < l; /archives//html/Amps/2009-05/msg00151.html (10,596 bytes)
82. [Amps] HV switch-mode power supply31 (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Thu, 28 May 2009 18:04:39 +0000 (UTC); Hi builders, My "honey-do-list" was really long these last few days, sorry for not getting back to the group sooner, but the free time I did have, I spent in the shop working on the amp cabinet. I've; /archives//html/Amps/2009-05/msg00247.html (7,439 bytes)
83. Re: [Amps] Toroidal transformers... (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Tue, 23 Jun 2009 21:49:10 +0000 (UTC); Hi Bob, I was just looking at some interesting toroidal transformers and ran across this: http://www.toroid.com/standard_transformers/transformer_kits/transformer_kits.htm There is some information o; /archives//html/Amps/2009-06/msg00102.html (8,201 bytes)
84. Re: [Amps] [ot] Dummy load oil (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Thu, 30 Jul 2009 16:06:30 +0000 (UTC); Maybe use a "trailing wire" think TACAMO and ABC P, you could even run HF effectively! Paul (KG7HF) _______________________________________________ Amps mailing list Amps@contesting.com http://lis; /archives//html/Amps/2009-07/msg00406.html (7,050 bytes)
85. [Amps] Subject: why a 200 watt transceiver (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Mon, 3 Aug 2009 12:44:49 +0000 (UTC); How about a less than obvious reason? Dial it back to 100 - 150 watts or so and run RTTY or other continuous modes with greater margins. Even if you have an amp that can do legal limit with no keyd; /archives//html/Amps/2009-08/msg00049.html (6,760 bytes)
86. [Amps] Pair of SB-220s (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Sun, 6 Sep 2009 15:20:26 +0000 (UTC); There is no reason that I know of it wouldn't and couldn't work. Like others have said, many VHF and some HF solid state amps use this method. You could have multiple splitters/combiners for vario; /archives//html/Amps/2009-09/msg00061.html (8,009 bytes)
87. [Amps] LK500-ZB (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Wed, 9 Sep 2009 18:36:50 +0000 (UTC); I saw a thread about LK500 and negative grid current. Was that ever solved? My LK500-ZB is acting up. OK, I think it is my fault, the amp was on, but in standby and I was in the shack hanging a pi; /archives//html/Amps/2009-09/msg00125.html (7,674 bytes)
88. Re: [Amps] LK500-ZB (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Fri, 11 Sep 2009 13:09:33 +0000 (UTC); Thanks to all that replied. At this point, I think a tube has gone bad. Removing the "bright" tube, the amp can be loaded up and produces output. Swapping the sockets, the problem seems to follo; /archives//html/Amps/2009-09/msg00149.html (8,890 bytes)
89. [Amps] Removing grid shorts (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Fri, 11 Sep 2009 18:31:32 +0000 (UTC); That makes sense. There doesn't appear to be any shorts between filament and grid or plate. It might also make sense to put a shorting bar on the filament pins as well as the grid. I suppose it; /archives//html/Amps/2009-09/msg00155.html (7,673 bytes)
90. [Amps] Grid shorts (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Sun, 13 Sep 2009 15:16:33 +0000 (UTC); Just an update on the 3-500z. It appears to be completely open when cold, so not successful so far. I'll need to make a little jig to heat it up and then zap it while it's hot. We'll see ! 73,; /archives//html/Amps/2009-09/msg00176.html (6,511 bytes)
91. Re: [Amps] 73 Magazine (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Fri, 25 Sep 2009 02:49:58 +0000 (UTC); Hi Dick, I'm not positive, but I think CQ magazine sells them under the name "Ham Radio Magazine" and you can get them on CD rom from their web site. Paul (KG7HF) ____________________________________; /archives//html/Amps/2009-09/msg00294.html (7,088 bytes)
92. Re: [Amps] 73 Magazine (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Fri, 25 Sep 2009 10:51:22 +0000 (UTC); Hi Chase and Dick You are right, I went and put my "ham radio magazine" CD in, and it's not 73. For some reason, I clearly remember seeing 73 magazine on cd somewhere. I'll look around here more.; /archives//html/Amps/2009-09/msg00307.html (8,404 bytes)
93. [Amps] Dimished Tube Life (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Fri, 25 Sep 2009 11:05:38 +0000 (UTC); Hi Group, I've watched a few of these questions go by over the years, and it made me wonder. When is a tube considered at it's end of life? Of course a tube like I posted about last week, where the; /archives//html/Amps/2009-09/msg00308.html (9,466 bytes)
94. [Amps] amp advice from Alpha (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Sun, 27 Sep 2009 23:21:19 +0000 (UTC); I wonder if transistors don't care because generally they are connected to well regulated power supplies. My guess is if transisters were subjected to big spikes in current and voltage similar to t; /archives//html/Amps/2009-09/msg00347.html (7,666 bytes)
95. Re: [Amps] old mags (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Wed, 30 Sep 2009 22:47:59 +0000 (UTC); Hey Builders, I'm mounting some parts in my home-brew 6m amp this weekend. I've seen a number of pictures and other commercial amps and most that I have seen have the plate and load caps mounted on; /archives//html/Amps/2009-09/msg00376.html (8,210 bytes)
96. Re: [Amps] load/plate controls (was: old mags, Dummy writers..because.. parasitcs can kill --is) (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Thu, 1 Oct 2009 23:37:57 +0000 (UTC); Was that destined for me? It's sometimes easier to just hit reply. Paul Date: Wed, 30 Sep 2009 22:28:29 -0400 From: Herzog <herzog@frontiernet.net> Subject: [Amps] Dummy writers..because.. parasitc; /archives//html/Amps/2009-10/msg00004.html (7,533 bytes)
97. [Amps] filament voltage (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Mon, 5 Oct 2009 19:35:23 +0000 (UTC); Hi Guys, I want to quickly double check my understanding of filament voltage. When the datasheet specifies 13.5 +- 0.6 V, such as with the 3cx800A7, are they referring to a DC voltage? So, if I hav; /archives//html/Amps/2009-10/msg00097.html (7,225 bytes)
98. [Amps] filament choke questions (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Wed, 7 Oct 2009 15:45:03 +0000 (UTC); Hi Guys, I'm making more and more progress on my amp, thanks for all of the help answering questions and such, it's appreciated. Some have asked for pictures, I'll post some shortly. "RFC2 - 14 tur; /archives//html/Amps/2009-10/msg00131.html (7,926 bytes)
99. [Amps] Pictures of number 1 (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Thu, 8 Oct 2009 13:29:43 +0000 (UTC); Here are some pictures of the work in progress. It's not so pretty, but so far, everything inside is working. There is still lots to do though. The underside, still quite a bit to do here with th; /archives//html/Amps/2009-10/msg00137.html (8,056 bytes)
100. Re: [Amps] TL922 Power Plugs (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Tue, 3 Nov 2009 17:50:42 +0000 (UTC); Another possible and likely problem is if the neutral opens somewhere in the house it would cause the equipment to not work. For example, you plug your stereophonic in with an open neutral, it wont; /archives//html/Amps/2009-11/msg00025.html (9,082 bytes)

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