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241. Re: [Amps] "Refurbished" BLF188XR's on eBay? (score: 1): Author: Yueh Hsu <hsu4qro@gmail.com>; Date: Sun, 15 Sep 2019 08:48:15 +0800; Just come back here,as my computer can not connect to gmail server.About Chinese fake RF power device, you cann't purchase so called "refurbished" device. Most of them are remark, the seller clean th; /archives//html/Amps/2019-09/msg00021.html (13,300 bytes)
242. [Amps] Pullout GU-74B/4CX800A and Eimac 3CX1500A7 +socket FS (score: 1): Author: Yueh Hsu <hsu4qro@gmail.com>; Date: Tue, 5 Nov 2019 23:42:14 +0800; Pull out from working equipment , GU-74B/4CX800A $70 10 pieces, Eimac 3CX1500A7 $300, 16 pieces, socket+grid ring(It seems Jonson;s socket) $40/ea, 15 Hsu ____________________________________________; /archives//html/Amps/2019-11/msg00032.html (6,581 bytes)
243. [Amps] vacuum tube test (score: 1): Author: Yueh Hsu <hsu4qro@gmail.com>; Date: Sat, 9 Nov 2019 12:09:56 +0800; I often seen there are somem people sell very cheap tube in the net.but if you can not have amplifier, how to test ?I do know how to test in the factory,But who have a large test bench what with high; /archives//html/Amps/2019-11/msg00061.html (6,545 bytes)
244. [Amps] Fwd: vacuum tube test (score: 1): Author: Yueh Hsu <hsu4qro@gmail.com>; Date: Sun, 10 Nov 2019 03:31:09 +0800; Bill I really forgot it Could you tell me your idea?my idea:I think it should be combine a Hi-pot tester and two DC variable power supplys, one for filament , another one connect with cathode and pla; /archives//html/Amps/2019-11/msg00064.html (9,961 bytes)
245. [Amps] anyone build an amplifier use 6T51 glass buble? (score: 1): Author: Yueh Hsu <hsu4qro@gmail.com>; Date: Sun, 12 Jan 2020 10:28:33 +0800; The datasheet here http://www.boezk.com/download_en/FU6051_EN.pdf, its mu=48,not too bad. it is a cheap tube . the manufacturer's list price only $100+.... Hsu _______________________________________; /archives//html/Amps/2020-01/msg00014.html (6,565 bytes)
246. Re: [Amps] anyone build an amplifier use 6T51 glass buble? (score: 1): Author: Yueh Hsu <hsu4qro@gmail.com>; Date: Sun, 12 Jan 2020 13:31:46 +0800; There are a few manufacturers in China, one of them located our city:D, If Its driveing power not too high, I want build one. _______________________________________________ Amps mailing list Amps@co; /archives//html/Amps/2020-01/msg00017.html (8,952 bytes)
247. Re: [Amps] anyone build an amplifier use 6T51 glass buble? (score: 1): Author: Yueh Hsu <hsu4qro@gmail.com>; Date: Mon, 13 Jan 2020 04:09:31 +0800; https://item.taobao.com/item.htm?spm=a230r.1.14.34.48d1291dAkpzn3&id=589518799923&ns=1&abbucket=16#detail the link is taobao the socket less than 10 bucks:D __________________________________________; /archives//html/Amps/2020-01/msg00021.html (9,616 bytes)
248. Re: [Amps] anyone build an amplifier use 6T51 glass buble? (score: 1): Author: Yueh Hsu <hsu4qro@gmail.com>; Date: Mon, 13 Jan 2020 05:31:54 +0800; https://detail.tmall.com/item.htm?spm=a230r.1.14.8.72c653fbR8xhRf&id=606357822679&cm_id=140105335569ed55e27b&abbucket=16 https://detail.tmall.com/item.htm?spm=a230r.1.14.1.72c653fbR8xhRf&id=606230613; /archives//html/Amps/2020-01/msg00022.html (9,493 bytes)
249. Re: [Amps] anyone build an amplifier use 6T51 glass buble? (score: 1): Author: Yueh Hsu <hsu4qro@gmail.com>; Date: Mon, 13 Jan 2020 05:48:03 +0800; ps, the plate dissapation is 800W but it is run in continuously business service,if run in intermittently business service, the plate diss is 1500W( only for ceramic-metal version) Hsu ______________; /archives//html/Amps/2020-01/msg00023.html (9,627 bytes)
250. Re: [Amps] anyone build an amplifier use 6T51 glass buble? (score: 1): Author: Yueh Hsu <hsu4qro@gmail.com>; Date: Sun, 26 Jan 2020 02:57:13 +0800; Hi Carl, 6T51's mu=48, 250TH only 38 ,450TL only 18, and 6C21 only 30. Are your sure it duo to low mu and not exciter's problem?low mu means high driving level,means driver 's outpu is very dirty too; /archives//html/Amps/2020-01/msg00035.html (13,704 bytes)
251. [Amps] Bird 437-3 element for bird 43 (score: 1): Author: Yueh Hsu <hsu4qro@gmail.com>; Date: Wed, 15 Apr 2020 16:38:51 +0800; Just view the website https://nm3e.com/HElements.htm, it mentioned that 437-3 element not for bird 43 wattmeter, but I knew element 437-3 match with line section 4230-053 and 30uA/1400ohm meter, Bird; /archives//html/Amps/2020-04/msg00004.html (6,848 bytes)
252. Re: [Amps] Bird 437-3 element for bird 43 (score: 1): Author: Yueh Hsu <hsu4qro@gmail.com>; Date: Thu, 16 Apr 2020 00:21:09 +0800; Thnaks Don The seller told me 437-3 combine 4230-053 match 30uA/1400ohm meter as I mentioned.same as Bird43's Just curious _______________________________________________ Amps mailing list Amps@conte; /archives//html/Amps/2020-04/msg00006.html (8,535 bytes)
253. Re: [Amps] Amp Pricing(??) (score: 1): Author: Yueh Hsu <hsu4qro@gmail.com>; Date: Thu, 8 Dec 2022 06:57:29 +0800; In recent years, Chinese 3-500Z and 572B have changed manufacturers. They are now manufactured by Hua Guang Tube Co., Ltd. - (hgdzg.com) <http://www.hgdzg.com/en-US/index.html> , a few hundred meters; /archives//html/Amps/2022-12/msg00020.html (10,441 bytes)
254. [Amps] 4XGU-81M amplifier (score: 1): Author: Yueh Hsu <hsu4qro@gmail.com>; Date: Wed, 28 Dec 2022 16:12:41 +0800; Now the 3CX series vacuum tubes have become jewelry, and the price of the 3-500Z has become less affordable. With the reduction of the price of solid-state devices and the increase of the output powe; /archives//html/Amps/2022-12/msg00121.html (8,898 bytes)

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