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1. [Amps] AL811H metering (score: 1): Author: Bob Henderson <bob@5b4agn.net>; Date: Tue, 1 May 2012 08:17:53 +0000; Advice please from AL811H users. I find myself in temporary possession of an Ameritron AL811H. The amp belongs to a local friend who purchased it new from DX Engineering at the end of February this y; /archives//html/Amps/2012-05/msg00000.html (7,414 bytes)
2. Re: [Amps] Tubes vs. Solid State (score: 1): Author: Bob Henderson <bob@5b4agn.net>; Date: Thu, 3 May 2012 17:22:58 +0000; The BLF578XR is rated for use between 10-500MHz, which is something of a limitation for ham use. A pity because it appears it might be a lot more rugged than the Freescale MRFE6VP61K25H which is rate; /archives//html/Amps/2012-05/msg00121.html (13,382 bytes)
3. Re: [Amps] Tubes vs. Solid State (score: 1): Author: Bob Henderson <bob@5b4agn.net>; Date: Thu, 3 May 2012 18:37:06 +0000; _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2012-05/msg00127.html (20,864 bytes)
4. Re: [Amps] Tubes vs. Solid State (score: 1): Author: Bob Henderson <bob@5b4agn.net>; Date: Fri, 4 May 2012 04:18:45 +0000; clip "The basic point is this: Class B or class AB push-pull amps MUST, I repeat _MUST_ have something that provides balance around a true center point. It cannot work in pure differential mode, beca; /archives//html/Amps/2012-05/msg00154.html (9,313 bytes)
5. Re: [Amps] Tubes vs. Solid State (score: 1): Author: Bob Henderson <bob@5b4agn.net>; Date: Fri, 4 May 2012 10:41:16 +0000; No that is definitely not the case. Bob, 5B4AGN _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2012-05/msg00159.html (9,159 bytes)
6. Re: [Amps] Tubes vs. Solid State (score: 1): Author: Bob Henderson <bob@5b4agn.net>; Date: Sat, 5 May 2012 05:59:53 +0000; Tom Interesting. Thanks. With your brass tube transformer, how was Vdd fed to the drains? The 10db reduction in H3 & H5 is a significant improvement but I am wondering how much is due to the bifilar; /archives//html/Amps/2012-05/msg00198.html (15,306 bytes)
7. Re: [Amps] LDMOS Solid State Amplifiers (score: 1): Author: Bob Henderson <bob@5b4agn.net>; Date: Sun, 6 May 2012 05:33:34 +0000; OK Tom. Thanks. It looks pretty good when operating at the 100W level. Out of interest, which Freescale device are you using and at what power level do you intend to operate the finished amp? 73 Bob,; /archives//html/Amps/2012-05/msg00215.html (9,559 bytes)
8. Re: [Amps] Alpha 87A owner (score: 1): Author: Bob Henderson <bob@5b4agn.net>; Date: Tue, 10 Jul 2012 09:26:10 +0000; On the other hand, I have owned and abused my 87A for more than 18 years now. Aside from a couple of small problems easily corrected in the shack, it has been a rock solid investment. When I have cal; /archives//html/Amps/2012-07/msg00153.html (8,063 bytes)
9. Re: [Amps] Alpha 87A ownerS (score: 1): Author: Bob Henderson <bob@5b4agn.net>; Date: Tue, 10 Jul 2012 19:32:45 +0000; I consider balance to be beneficial. I do provide constructive criticism where I consider it due. You shouldn't need to dig too deep to find evidence of my having done so. If I can help with further; /archives//html/Amps/2012-07/msg00157.html (20,703 bytes)
10. Re: [Amps] K3 spike problem (score: 1): Author: Bob Henderson <bob@5b4agn.net>; Date: Thu, 16 Aug 2012 10:21:18 +0000; So who is telling Charles his K3 doesn't suffer overshoot. I don't see anyone though I see plenty of folks drawing Charles attention to the fact that their K3s don't exhibit this problem. I have also; /archives//html/Amps/2012-08/msg00241.html (12,950 bytes)
11. Re: [Amps] K3 spike problem (score: 1): Author: Bob Henderson <bob@5b4agn.net>; Date: Thu, 16 Aug 2012 12:27:16 +0000; It seems we have different interpretations of the same material. I didn't think anyone was blaming Charles. I just saw helpful pointers towards a solution. However, I observe Charles is prone to stir; /archives//html/Amps/2012-08/msg00244.html (19,807 bytes)
12. Re: [Amps] just the facts (score: 1): Author: Bob Henderson <bob@5b4agn.net>; Date: Thu, 16 Aug 2012 15:10:58 +0000; There is a difference between a fault and a design flaw. Your reports of design flaws lack evidence. It is eminently possible your equipment is faulty or maladjusted but that is something different e; /archives//html/Amps/2012-08/msg00252.html (9,443 bytes)
13. Re: [Amps] designs and age (score: 1): Author: Bob Henderson <bob@5b4agn.net>; Date: Fri, 17 Aug 2012 01:55:46 +0000; Hello Charles In my experience all electronic equipment has failure prone elements which become obvious as time progresses. I suppose these might be called design flaws but they are different to the; /archives//html/Amps/2012-08/msg00265.html (13,772 bytes)

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