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Mic / mic pre 12AX7 tube replacements
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nobo
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#1
20th October 2009
Old 20th October 2009
  #1
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Mic / mic pre 12AX7 tube replacements

Hi,
I have a CAD VX2 which I think needs a new tube (I suspect the 12AX7 rather than the 12AU7)* and was wondering if anyone had any recommendations (for either or both tubes). I'm based in England, in case that makes a difference to the recommendations!
Many thanks,
Dan




* It's making some background noise that is almost like interference and is louder than the self noise of the mic (registering around -40 to -50 on my recorder). For memory, I think it was intermittent - in that it made the noise for several minutes, and then would stop making the noise for a little while before coming back again.
#2
22nd October 2009
Old 22nd October 2009
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Rca 7025/12ax7 tube is my personal first choice, second is the Amperex 12ax7/ecc83 third is groovetubes 12ax7a gold pins and Electroharmonix 12ax7 gold (same tube just relabled)

rca 12au7a clear top , mullard cv4003/ecc82, JJ tesla ecc82/12au7 gold pin or JJ electonics ecc802/12au7 gold pin
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nobo
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23rd October 2009
Old 23rd October 2009
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#4
23rd October 2009
Old 23rd October 2009
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One of the members here is named BOWIE, try to MP this guy, he is actually really fine for choosing a tube corresponding to your needs, your unit, whatever… ! I did twice that choice to go with him, and do not ever regret !

Here is his e-mail :

ProAudioTubes@aol.com



P.S. : I'm not part in his company, just a nicely satisfied customer…
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24th October 2009
Old 24th October 2009
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Since your mic is a modern one I'd try "Ei" 12AX7 / ECC83
RCA, AMPEREX etc etc etc are great but, these Ei can provide "more" midrange in new equipment with modern capcitors and resistors.
Try and use the best for you, it's a matter of taste.
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24th October 2009
Old 24th October 2009
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#7
24th October 2009
Old 24th October 2009
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another vote for Bowie, let him know what you are shooting for and what you are using - cant go wrong.
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