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    Excellent affordable Clear Top 12AU7s

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    vtshopdog

    Posts : 69
    Join date : 2015-07-11
    Location : UT, USA

    Excellent affordable Clear Top 12AU7s

    Post by vtshopdog on Tue May 31, 2016 5:56 pm

    In case anyone is interested, found these on eBay and figured for $25/pair I could take a leap and try a quad in my SP12 for half the price of just one of my Mullard British CV4003's (NIB now fetching around $100 each - ouch!!) The Mullards are 3 years old and starting to sounding a bit scrrrrrrratchy, so on the hunt for replacements.

    Installed Clear Tops over weekend and like them enough to order another quad to stash for future use.  (did that before posting here, sorry fellas)  They are RCA made Conn labeled electric organ stock and the four I received are all very tight match, dead quiet and CHEAP.  To my ear they are different and every bit as likeable as the Mullards, but with a quad costing $350 less, well, it's no contest.

    Here is the listing URL, he has a bunch of other tubes (lots of RCA relabels and other 12AU7s):
    http://www.ebay.com/itm/162036665801
    Or here is his seller page if listing expires:
    http://www.ebay.com/sch/spin4cards/m.html?_nkw=&_armrs=1&_ipg=&_from=

    Doubtless someone here has bought from this seller, but he's new to me and ebay can be a bit sketchy.  (he seems to sell electric organ vacuum tubes and baseball cards - it's eBay, go figure??)

    Cheers,
    Tim

    BTW:
    Moved the Mullards to the driver slots in my M125's and the bright RCA sound in preamp feeding the Mullards with their sweet mids is pretty much delightful in my rig.  Really happy.

    mark four

    Posts : 33
    Join date : 2011-08-12
    Age : 61
    Location : philadelphia , home of dynaco

    clear top 12au7's

    Post by mark four on Tue May 31, 2016 6:16 pm

    they are well worth the investment . you can get the conn version for a good price . also rca clear top 6cg7/6fq7 tubes . they are affordable also . i have a harman/kardon HK-20 amp that uses 6cg7's they had amperex made in holland tubes that i switched out for the rca's and it is like night and day . happy listening out there .

    pedrocols

    Posts : 63
    Join date : 2014-11-24
    Location : Western MA

    Re: Excellent affordable Clear Top 12AU7s

    Post by pedrocols on Tue May 31, 2016 9:58 pm

    I am currently using a matched pair of RCAs on my m125s and they have a noticeable more extended top end than the Mullards cv4003 I was previously using. However, the Mullards have a wicked mid range!

    vtshopdog

    Posts : 69
    Join date : 2015-07-11
    Location : UT, USA

    Re: Excellent affordable Clear Top 12AU7s

    Post by vtshopdog on Tue May 31, 2016 11:35 pm

    Seems like with RCAs in pre and mullards in driver position I'm getting most of what I like out of both tubes, i.e. sweet mid and top ends.  Maybe price for that is so-so bass, but fiddled with some knobs on the sub to help bring it around.  

    Mullards were getting noisy in preamp but play just fine as drivers.  I stuffed all four in the m125s but should probably put something more sensible in inverter slot and save half the quad for future use considering I'm not likely to pay whatever they might cost in future.

    tubes4hifi
    Admin

    Posts : 1282
    Join date : 2008-11-30

    Re: Excellent affordable Clear Top 12AU7s

    Post by tubes4hifi on Wed Jun 01, 2016 10:41 pm

    I bought about 8 of them from the same seller about a month ago, excellent quality

    pedrocols

    Posts : 63
    Join date : 2014-11-24
    Location : Western MA

    Re: Excellent affordable Clear Top 12AU7s

    Post by pedrocols on Fri Jun 03, 2016 9:06 pm

    I want to clarify I m using the RCA 12bh7.

    deepee99

    Posts : 1332
    Join date : 2012-05-23
    Location : Wallace, Idaho

    Re: Excellent affordable Clear Top 12AU7s

    Post by deepee99 on Sat Jun 18, 2016 6:50 pm

    Can't go wrong with RCAs, with one caveat: make sure they're US-made. They built a factory in Brazil to keep inventory in stock while they wound down their US tube-making operation and those Brazilian ones show up on FeeBay every now and then. They suck.

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    Re: Excellent affordable Clear Top 12AU7s

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