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Post by myles on Jul 22, 2013 17:26:34 GMT -7
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Post by BritInvasion on Jul 22, 2013 17:52:39 GMT -7
Awesome , thanks so much for your work and willingness to share Myles! Saves us a lot of money and aggravation.
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Post by hymns on Jul 22, 2013 20:19:14 GMT -7
Myles have you heard of Shuguang Psvane tubes. Just heard about them and was wondering about their quality.
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Jul 22, 2013 23:15:43 GMT -7
Thank you, Myles!
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Post by Mark (Basement Enthusiast) on Jul 23, 2013 6:51:26 GMT -7
I simply cannot get my mind around Myles' unsurpassed knowledge of tubes.
All this talk of bad tubes, tubes out of spec, etc., also doesn't make me wanna be in the Doc's shoes. I mean, we're pretty much living in the golden era of STELLAR tube amps—new, unique designs, from many manufacturers, that sound amazing—and yet today's tube supply looks more crappy than ever. What gives?
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Post by myles on Jul 23, 2013 8:57:06 GMT -7
Myles have you heard of Shuguang Psvane tubes. Just heard about them and was wondering about their quality. They are a product with an audiophile target market. More selected. Pretty gold bases on some models. Really nice boxes! But ... if a tube meets spec and is built properly it is of more interest to me than making runs of pretty tubes and then selecting which ones actually make the mark.
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Post by myles on Jul 23, 2013 9:21:15 GMT -7
PSVane Tubes - Shuguang is the largest tube manufacturer in China. Over the last decade they made some designs under contract for various companies, the first of which was Groove Tubes from 2002-2008. GT supplied the original engineering drawings and parts. Shuguang learned that there is a market for "vintage" type tubes. Over the years Shuguang would "backdoor" GT supplied and exclusive parts to some of their other customers. One of these customers, TAD of Germany, sold the GT 6L6GE with black vented plates made from GT parts. They were sued, successfully, and the 6L6 TAD stock was turned over to GT. GT then sold the tubes as a Chinese 6L6 until that stock was gone. Shuguang learned that there was a market and it was a simple matter to print up slick boxes, gold plate metal bases on some models and dramatically raise price on basically the same item in new clothes or a change of an internal design with no attention to quality, material or QA/QC. If you look at their website under Quality Control you may ask yourself, "why don't they do this on their other tubes". I asked myself the same sort of questions as their engineers could not explain to me how plate resistance changed and was half the spec value on the 12AX7M year after year in monthly meetings I would have with them face to face. psvanetube.com/wordpress/psvane-tubes-quality-control/They are off and running. Charge a high enough price and there will be some great reviews. It is human nature to want to exclaim how right, lucky, brilliant you are by trying to justify that you just spent $83.00 a pair for 12AT7 tubes that have a suggested burn in time of 75-100 hours before they are stable? You've got to be kidding me. psvanetube.com/wordpress/store/products/12at7-t-pair/As a side note, the data sheet on this tube is a flat duplicate of a 12AT7 data sheet from all tube makers from the past. Once again people .... Just sell consumers a tube that meets spec for your standard offering. Take a look here. You can pay even more for the series II tube! Or .... check out the dropdown menu and buy the tubes that are substandard, not well matched, more noisy but, although still more expensive than anything out there they come in less pricey versions. psvanetube.com/wordpress/store/products/12at7-tii-pair-or-single/Things continue to decline.
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buster
Junior Member
Posts: 73
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Post by buster on Jul 23, 2013 14:20:24 GMT -7
Thanks for the valuable info. Myles. I was wondering about the Tungsol el84 reissue but after reading the info on your website, I think it is likely these el84 are likely just rebranded Sovteks. Very interesting this world of marketing, quite sad really. There is no honour. Buster
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Post by myles on Jul 23, 2013 15:32:44 GMT -7
Thanks for the valuable info. Myles. I was wondering about the Tungsol el84 reissue but after reading the info on your website, I think it is likely these el84 are likely just rebranded Sovteks. Very interesting this world of marketing, quite sad really. There is no honour. Buster You are right on the money.
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Post by hymns on Jul 24, 2013 6:40:25 GMT -7
Thanks Myles. I agree completely. I don't care what a tube looks like. I'm all for quality and tone value. If it meets spec it meets spec but all the glamour I'm not going to pay for. Thanks buddy and keep up the great work. I sure am glad there is a person that is straight up on the tube situation and won't tell us BS about these beautiful tubes that are trying to be slipped by us as the next greatest. Thanks again my friend.
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