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2nd June 2011, 02:42 AM
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#2 |
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diyAudio Member
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Depends on what you're gonna use 'em for. Both types are more RF types than audio. The 12AT7 does work pretty good as an LTP, and 'AU7s make good cathode followers. As a straight audio amp, probably best to get the distortion down with an active plate load. (Even better would be to replace it with something like the 6FQ7.)
As for brands, who knows? Everyone has an opinion on that, and they vary widely, depending on usage. |
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2nd June 2011, 02:47 AM
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#3 |
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diyAudio Moderator
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For 12AT7, I've tested at least a dozen different kinds- JJ are easily the most linear, and not too expensive as a bonus.
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“Listening to records is like ****ing a picture of Brigitte Bardot.” - Sergiu Celibidache |
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2nd June 2011, 06:59 AM
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#5 | |
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diyAudio Member
Join Date: Mar 2007
Location: Auckland, NZ
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Quote:
Value is a values-loaded statement. I'm poor, and so value is cheap and working. You may be different. Detail - I'll presume you mean musical - is a function of a few more components than just the tube. Cool that they are for a preamp. Voltage amplification? or a cathode follower? Or both? Straight common cathode, or a SRPP/Mu follower/whatever after you fancy? Operating points? I'm surprised SY didn't get in first, but the tube is a single component and of itself is incapable of being categorised by any of your three criteria without a lot more information. This all in the spirit of seeking a best possible answer for you, not as a troll. Truly.
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Yes, conservatism thrives on low intelligence and poor information. But the liberals in politics... continue to back off, yielding to the supremacy of the stupid. It's turkeys all the way down. - George Monbiot, guardian.co.uk, 6 Feb 2012 |
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2nd June 2011, 06:01 PM
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#6 |
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diyAudio Member
Join Date: Mar 2005
Location: Phoenix, Arizona USA
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5th June 2011, 12:55 AM
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#7 |
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diyAudio Member
Join Date: Dec 2006
 
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I would second JJ's
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5th June 2011, 02:23 AM
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#8 |
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diyAudio Member
Join Date: Aug 2008
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RCA 12AT7's with the shiny black plates. Excellent detail.
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12at7 and 12au7
