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1. [Amps] Why do tubes cost so much? (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Sun, 29 Aug 2010 17:03:23 -0700; I have often wondered why big tubes cost so much. The material in them isn't all that great and I would think because they are larger they would be easier to assemble than, say, a 6AU6 which is very; /archives//html/Amps/2010-08/msg00445.html (8,722 bytes)
2. Re: [Amps] Why do tubes cost so much? (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Mon, 30 Aug 2010 01:05:17 +0000; I believe it is because the grid assembly must be hand aligned and welded in place with great precision (and the screen grid aligned with the cathode and grid assemblies when present) to result in th; /archives//html/Amps/2010-08/msg00446.html (9,947 bytes)
3. Re: [Amps] Why do tubes cost so much? (score: 1): Author: "Frederick Mott" <fredmott@zoominternet.net>; Date: Sun, 29 Aug 2010 21:24:24 -0400; The law of supply and demand determines the price. First of all they have to make a profit to survive. Second they will charge all they can to maximize their profit. They must charge more than the br; /archives//html/Amps/2010-08/msg00447.html (10,091 bytes)
4. Re: [Amps] Why do tubes cost so much? (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Sun, 29 Aug 2010 21:40:57 -0400; I think that Bill and Fred have summarized things nicely. But I also suspect that the "tiny" tubes like a 6BA6 are assembled in a relatively (if not entirely) automated operation. And I chose the 6BA; /archives//html/Amps/2010-08/msg00448.html (9,747 bytes)
5. Re: [Amps] Why do tubes cost so much? (score: 1): Author: "Hardy Landskov" <n7rt@cox.net>; Date: Sun, 29 Aug 2010 18:46:32 -0700; Bill, I was sticker shocked myself when I wanted to buy a replacement 3-1000. I talked to a manager of Eimac in Salt Lake City who basically said the 3-1000 was on its way out and the tooling, time,; /archives//html/Amps/2010-08/msg00449.html (10,153 bytes)
6. Re: [Amps] Why do tubes cost so much? (score: 1): Author: "Jeff Blaine" <keepwalking188@yahoo.com>; Date: Sun, 29 Aug 2010 20:59:18 -0500; Volume. 73/jeff/ac0c www.ac0c.com _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2010-08/msg00450.html (9,731 bytes)
7. Re: [Amps] Why do tubes cost so much? (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Sun, 29 Aug 2010 23:13:48 -0400; Not for sure, but they are low volume, labor intensive, and produced in batch runs. More than likely the set up costs are substantial. Even the larger tubes like the YC156, 3CX3000 4CX3000, 3CX5000,; /archives//html/Amps/2010-08/msg00451.html (9,875 bytes)
8. Re: [Amps] Why do tubes cost so much? (score: 1): Author: "Alex Eban" <alexeban@gmail.com>; Date: Mon, 30 Aug 2010 08:07:12 +0200; A number of factors conspire. First, the materials are a big stumbling block. The porosity of the materials is the main issue: the bigger the tube, the more stringent the requirement becomes and the; /archives//html/Amps/2010-08/msg00453.html (11,693 bytes)
9. Re: [Amps] Why do tubes cost so much? (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 30 Aug 2010 09:04:50 -0400; I read somewhere (years ago so dont quote me) that tubes with extremely close grids such as the 3CX800 and 1500 have yields around 20%. You would think that after all these years companies would have; /archives//html/Amps/2010-08/msg00457.html (10,968 bytes)
10. Re: [Amps] Why do tubes cost so much? (score: 1): Author: "Bill VanAlstyne W5WVO" <w5wvo@cybermesa.net>; Date: Mon, 30 Aug 2010 10:33:44 -0800; This is an interesting thread in terms of manufacturing and marketing "philosophy" (if you will). When you're looking at a tube that has been around for a while, you're basically looking at a post-ma; /archives//html/Amps/2010-08/msg00467.html (14,056 bytes)
11. Re: [Amps] Why do tubes cost so much? (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 30 Aug 2010 15:07:18 -0400; I guess you dont play around with vintage vehicles Bill. Reproducing old parts is a huge and profitable business if the quality is there. Some have the blessings of the Big 3. And it doesnt have to b; /archives//html/Amps/2010-08/msg00473.html (15,760 bytes)
12. Re: [Amps] Why do tubes cost so much? (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Mon, 30 Aug 2010 16:27:44 -0700; ORIGINAL MESSAGE: REPLY: Pearls of wisdom. Like most such things, obvious once someone points them out. Thanks, Bill 73, Bill W6WRT _______________________________________________ Amps mailing list A; /archives//html/Amps/2010-08/msg00479.html (10,188 bytes)
13. Re: [Amps] Why do tubes cost so much? (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Tue, 31 Aug 2010 01:17:57 -0700; ORIGINAL MESSAGE: REPLY: Really? I have one of those and I always thought it was pretty good. Since this is off topic for this reflector, could you email me privately and give me some more info? Than; /archives//html/Amps/2010-08/msg00484.html (9,966 bytes)
14. Re: [Amps] Why do tubes cost so much? (score: 1): Author: "Bill VanAlstyne W5WVO" <w5wvo@cybermesa.net>; Date: Tue, 31 Aug 2010 04:51:27 -0800; Done. Bill W5WVO _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2010-08/msg00485.html (10,627 bytes)
15. Re: [Amps] Why do tubes cost so much? (score: 1): Author: "Bill VanAlstyne W5WVO" <w5wvo@cybermesa.net>; Date: Tue, 31 Aug 2010 05:17:19 -0800; Well, no, I don't play with cars. I was always an electronics guy first and foremost, from an early age. I didn't even get a driver license until I was 18. LOL If it didn't directly contribute to ham; /archives//html/Amps/2010-08/msg00486.html (18,938 bytes)
16. Re: [Amps] Why do tubes cost so much? (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Tue, 31 Aug 2010 13:07:04 +0000 (UTC); The Axioms probably hold true for the most part, but there are many cases in modern sales where they don't really hold. One case I can think of is software. There are many software products which ar; /archives//html/Amps/2010-08/msg00487.html (8,093 bytes)
17. Re: [Amps] Why do tubes cost so much? (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Tue, 31 Aug 2010 12:26:39 -0400; My modeling in the 90's with YO included reworking the CC A50-5S as 4 and 5 elements. The gain difference between them and the original was only a few tenths when optimized at the low end. The optimi; /archives//html/Amps/2010-08/msg00489.html (21,001 bytes)

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