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Old 13th December 2012, 01:02 AM   #11
SY is offline SY  United States
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You mean the company who spams this forum (and the LinkedIn groups) repeatedly? My confidence in their integrity is something less than zero.
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Old 13th December 2012, 01:05 AM   #12
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Not to mention my email inbox...
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Old 15th December 2012, 12:36 AM   #13
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$30 for such a linear tube isn't bad at all. Yes, my JJ 300B and my Chinese 300B have never failed. DHTs seem to last a very long time. The RCA 45's that I'm using have been used since the 1930s and sounds amazing.

Joel, I can make pretty much all 300B sound similar to each other by adjusting the voltage, bias current, and taps on my output transformer (dampening factor). I'm using a Tubelab SE which has a strong low impedance drive and it negates the differences between various 300B tubes. If you're using an old school 6SN7 driver then the differences between tubes will be greater. Then the input capacitance of the particular 300B can affect the frequency response, etc.

I'd say get a cheap and reliable Chinese tube and just be done with it.
I'm starting to learn most of this from my builder about what your saying here..

thanks
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Old 15th December 2012, 12:37 AM   #14
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Seems Guiguang has taken by the hi priced audiophile PSVANE brand in October2011.
So Shuguang factory no more made the PSVANE tubes, which is a good thing for Psvane tubes.

An announcement: Who was GuiGuang? | Psvane Audio Tubes, Caps and Amps
Looking at ordering PSVANE
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Old 16th December 2012, 08:52 AM   #15
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Where can you get 300b tubes for $30.00????????????
Is this a JOKE.
Phil
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Old 16th December 2012, 06:29 PM   #16
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Where can you get 300b tubes for $30.00????????????
Is this a JOKE.
Phil
Maybe they are rejected 300Bs or used.
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Old 16th December 2012, 06:34 PM   #17
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I meant $30 each, $60 for pair. Sorry, my mistake. They are cheaps Shuguang.
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Old 16th December 2012, 06:49 PM   #18
kevinkr is offline kevinkr  United States
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In quantity in 1998 - 2001 time I was paying far more than $30 for a Valve Arts 300B wholesale, not sure where you are getting your pricing from, and good ones are a lot more. I think with very careful shopping you might get a serviceable pair for a little less that $200 shipped from China.

I still have a wholesale account with a major U.S. importer, even in huge quantities they have nothing that comes close to the prices you quote.
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Old 16th December 2012, 07:42 PM   #19
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$60 for pair.
Maybe they are rejected or used.
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Old 16th December 2012, 07:52 PM   #20
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I don't know... I got 10 pairs of them on eBay. They seem to sound good. If you look at For Sale forums and eBay from time to time, there are good deals.
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