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Darkvoice 336i & 336SE Tuberolling PartII

Discussion in 'Headphone Amps (full-size)' started by heatfan12, Jul 31, 2008.
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  1. Slade01
    Jesus. EXACTLY - I thought for sure my 6XX was toast and I'm still a little paranoid now with some PTSD to plug my headphones in too soon or to roll tubes right now as I dont want to mess with the mojo for the moment. Ive never had an issue, ive actually always left my headphones plugged in when turning it on off. That is no longer going to be the case. It was strange because it was giving me the rice krispies treatment snap crackling popping erratically even as i just touched the side of the dark voice unit when happening. Extra careful moving forward....
  2. JKDJedi
    These tubes need some TLC, I found out an occasional cleaning of the pins helps out. I had my first arc of the tube last weekend and thought i destroyed my HD6XX the same, :D I was quick swapping/rolling preamp tubes and my guess some current was still in there and on restart... POP!!
    Slade01 likes this.
  3. cddc
    Je...you guys scared me off with all these Crash! Boom! Bang! things.

    Why so much arcing and popping recently...

    I think I should hold off tube rolling temporarily until the safety god arrives... :D
    DarkDrummer likes this.
  4. attmci
    U can use a couple of 6Bl7/6bx7 without problem on YOUR amp.
  5. cddc
    Thank a lot for the recommendation, mate!

    My initial hunch is that I might not be able to use 2*6BL7 in my BHC, because 2*6BL7 + 1*6SN7 = 2*1.5A + 0.6A = 3.6A current pull is exceeding the 3.5A limit of my PT3 power transformer.

    Besides, I haven't really looked into 6BL7 tubes yet.
  6. JKDJedi
    Not worth the bother, get a nice 6as7g, 7236, or 5998. Done.
    DarkDrummer and cddc like this.
  7. cddc
    Sorry to hear your bad experience on 6BL7, buddy. On the 6080/6AS7G power tube side, there're really not too many good ones to choose from. The 6SN7/12AU7 driver tube is totally different, so many good ones and so many opinions, I am kinda getting lost but still exploring. :)
  8. attmci
    Oh, yes, I did use the 12AU7s when I was playing with the twin 6BL7s on the BHC. You have to shield the transformer noise or use other way to avoid :))). Moreover, I have to chose the correct pair of 6BL7s otherwise the results were no good.

    Sorry, I understand this is not the BHC thread.
    cddc likes this.
  9. JKDJedi
    This threads favorite is the Tung SOl 7236, 12au7, hear a lot of good things about the Genalex Gold Lion, and as far as 6SN7 tubes, any Tung Sol, Sylvania, RCA in the late 40's lower 50's....win.
    cddc likes this.
  10. cddc

    It's a close cousin to DV336, same tubes (I'm pretty sure) and same (?) OTL structure. That's why I am here...LOL :smile:

    Talking about tubes here is okay, I think

    I will spend some time to look into 6BL7 tubes:)
  11. cddc
    I got TS7236 long time ago, but yet to hear a 421A or 5998, I know they are really good, but their prices are just crazy...wait to see if there is some good opportunity to grab one. My main focus recently is on 6SN7 tubes, so many good ones...LOL
    JKDJedi likes this.
  12. JKDJedi
    And you got me interested in the 12Au7 now.... Lol, thanks! If you see a 6SN7 you think you might like post it up here for our 2 cents.
  13. cddc
    Will do. To be honest, there're some good 12AU7s, like Telefunken/Mullard, but I think I prefer 6SN7 to 12AU7 in general, so don't waste too much of your time on 12AU7s IMHO.
    JKDJedi likes this.
  14. JKDJedi
    You just saved me some $$$ thanks. oh, and look for RCA grey glass, they're not that expensive but sound expensive... what tubes do you have?
    Last edited: Sep 26, 2019
  15. JKDJedi
    Not the momma...
    Last edited: Sep 26, 2019
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