Posted by QuadESL63 (A) on October 02, 2006 at 16:01:56

Can I use an ECC32/CV181 or a 6SN7GT instead of a 6SN7GTB?

The ECC32/CV181's plate voltage is 300V max (w/ a higher filament current drawn) and 6SN7GT is 250V max, so is it safe to plug any one of these on the Kit 2 (or Kit 1) amp? The "stock" 6SN7GTB's plate voltage is 450V... if the Kit is designed for this plate voltage I don't want to plug a Mullard CV181 (or Sylania 6SN7GT) on my Kit 2 and have it burning its candle on both ends.

• Re: Yes, you can on Kit 1 - beto1 17:37:37 10/02/06 (4)
  In Reply to: Questions about the 6SN7 on Kit 1 and Kit 2 posted by QuadESL63 on October 2, 2006 at 16:01:56:

  Hi,
  I have asked about using CV181 on the Kit 1 on this forum some time ago, but no one knows the answer, then I have send an e-mail to PQ and he answer the following:
  "the CV181 should work fine in place of the 6SN7 and should sound better as well".
  THis works fine as a 6SN7 replacement on KIT 1, I don't know if works on Kit 2.
  Finally, I can say that my 1946 MUllard CV181 sound better (precise, not too warm, not too cold)than some others that I have own.
  Hope this help.
  Regards,
  Beto
  
  
  

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  • Beto, what 6sn7 do you like best? - DougE 16:31:19 10/20/06 (3)
    In Reply to: Re: Yes, you can on Kit 1 posted by beto1 on October 2, 2006 at 17:37:37:

    I have a cv181 on order based on this thread, but I'm curious if there's another you prefer?
    
    

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    • Re: Beto, what 6sn7 do you like best? - beto1 18:37:51 10/20/06 (2)
      In Reply to: Beto, what 6sn7 do you like best? posted by DougE on October 20, 2006 at 16:31:19:

      Hi DougE,
      This is my rating (very limited, because I do not try too much yet)
      1.-Mullard CV181 (1946) the best overall (dark first but then open and wide)
      2.-Brimar CV1988 (1972), brown base excellent and warmer than Mullard
      3.-RCA 6SN7GT (1946)silver logo sweet, very nice, a romantic tube.
      I have to reknow that since I have install the cv181 I never hear another. My NOS tube dealer offer me some others like Sylvania, also I'm waiting for the USA militar version VT-231 and the famous RCA red base.
      Best regards,
      Beto
      
      

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      • Thanks, Beto. Here's a few that I've found - DougE 10:52:49 10/25/06 (1)
        In Reply to: Re: Beto, what 6sn7 do you like best? posted by beto1 on October 20, 2006 at 18:37:51:

        to be good:

        5692 Red Base RCA (I read all red base are RCA despite labels)
        6sn7WGA (I think-maybe wrong on WGA part) chrome top Sylvania
        6sn7GT/VT-231 black sided Tung-Sol. This has alot of top end extension to the point of being too bright at times, but is really good overall.

        Thanks for your input, Beto. Btw, I tried to order a cv181 from tubedepot.com but they wrote back that they were out of stock. Guess I'll have to wait til more surface to try one.
        
        
        

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        • Re: Thanks, Beto. Here's a few that I've found - beto1 18:18:36 10/25/06 (0)
          In Reply to: Thanks, Beto. Here's a few that I've found posted by DougE on October 25, 2006 at 10:52:49:

          Hi Doug,
          yes red base and some VT-231 are the ones I like to compare with the CV181.
          I was very lucky this Mullard becuase my NOS tube dealer offer me as a "bocatto di cardenale" but I really don't knew it,so I have delay my dicision for a week, meanwhile I have asked on the forums. Then PQ answer me and I have get one of the 5 he have. Then I have think in get a second, but unfortunnely, he sold all on that week. The best part was he sold me the tube in a ridiculous price, compared with the cost on tube depot or ebay. The bad part, since then, he never had again another bunch. This tubes are absolutelly rugged and sound really great. Of course, I don't know if all production years are the same in quality, but mine are stunning.
          Since your post, I have change for a while with my Brimar CV1988 to compare, and sound great also, but I prefer the CV181 absolutelly.
          Hope I can get soon some red base to compare.
          Best for you,
          Beto
          P.S. Now I'm enjoying a pair of BRimar CV4004 on my phono stage and sounds great (well, compared with the original Ei) I will get also a pair of Mullard and Telefunken soon
          
          

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