Official Egnater Tweaker 15 Tube Swapping Thread!

Discussion in 'The Squawk Box' started by ibanezcollector, Dec 29, 2012.

  1. ibanezcollector

    ibanezcollector Senior Member

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    As some may or may not know you can do tube swapping on the Egnater Tweaker 15 with out rebiasing since its cathode biased.

    Bruce Egnater has said and will say again it can take 6v6, 6L6, EL34, EL84 with Adapters, KT66, KT77, 6550 etc really any octal based tube.

    So with that being said.. Has anyone done any tube swapping? Lets try and get a good resource with what tubes and what results.

    I am using a Epiphone Les Paul with Dimarzio 36th Anniversary PAF's, I dont use the amp for distortion I use pedals, so my reviews will be based off the clean channel or hot channel with limited gain.

    I have tried Tung Sol Reissue 6V6GT's Tung-Sol 6V6GT New Production Power Vacuum Tube I found these to be better then stock with out a doubt but still a bit dark sounding. Pushed the mids a little more then stock tubes. I wasnt to impressed with the Tung Sol's.

    I then put in a set of JJ Tubes 6v6S JJ 6V6S Power Vacuum Tube this really brought the amp to life, treble was increased but not in a shrill kinda way it was a nice musical high end. The bass was tightened up and not boomy and the mids blossomed well, has been in the amp since I tried them.

    As for preamp tubes I have tried a few and have more en route.

    Currently my favorite is the JJ 5751's JJ 5751 Preamp Tube in V1(Pre) and V2(Phase Inverter) this really brought a very creamy tone to the amp. The highs are beautiful and relaxed for lack of a better word, even with the bright engaged and treble boosted the highs never get ice picky. The bottom end is robust but never muddy. Good creamy mids. Takes the pedals like a champ.. This is my current setup.


    For fun I put a set of JJ 12AU7's JJ ECC82 / 12AU7 Preamp Vacuum Tube in V1 and V3 and this cut the power of the amp down to half or more, to get the same bedroom level volume I had the master at 50% Had a decent tone but would only use this if volume was a huge concern. Good for the bedroom guys you can get more control of your master volume. I found that if you were using pedals a 12AU7 in the V1 and the 5751 in V3 yielded awesome results and tone for pedals and those with volume concerns.

    I have en route a pair of JJ Hi Performance ECC803s, a Sovtek 12AX7LPS, and JJ EL34's, and currently shopping for some NOS 6P3S, and a couple pairs of KT66's
     
  2. bilbarstow

    bilbarstow Premium Member

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    Ibanezcollector, thanks for starting this thread. I have a Tweaker and have been considering rolling some tubes through it. I have not been playing through it much as the Hellfire I built has become my #1 amp, but the variety of tones available through the Tweaker makes it very suitable as a backup. I will be interested to hear what people have to say about tube results.
     
  3. xsouldriverx

    xsouldriverx V.I.P. Member

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    Try a jan philips 5751, they are really creamy.

    I like them paired with JJ kt77s, though i like the kt77s mostly for their ditortion characteristics. They add a nice tight bottom end and a sizzle to the top that i love. If you get a chance try it out, you may actually use the amps distortion for oce.
     
  4. ibanezcollector

    ibanezcollector Senior Member

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    funny you say that xsouldriverx I was just looking at the JANs on ebay haha :)
     
  5. Riffraff12571

    Riffraff12571 Senior Member

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    So far:

    Power

    '67 RCA 6V6GTA gray plates
    '74 SARATOV 6P3S

    I really like both. The RCAs are fantastic and I will probably go back to them again but I currently have the 6P3S set in it.

    Preamp

    Sovtek 12AX7WB in V1
    '66 Mullard 12AT7 in V1
    '90s National branded 5751 in V1 (Chinese)
    '62 Sylvania 12AX7 long plate in V1, then V3 (like this in V3, still there)
    '78 FENDER branded GE 12AX7 in V1 (like this, still there)

    The Fender branded 12AX7 was borrowed from V1 of my SF Vibro Champ. I put another '62 long plate Sylvania in it's place and my SFVC is one happy camper. I haven't tried a 12AU7 in the amp yet but I've got a NOS Ratheon in my tube collection so I think I'll give that a try. It might be good paired with my Mullard 12AT7.
     
  6. ibanezcollector

    ibanezcollector Senior Member

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    how was the 6P3S? keep hearing these really wake the amp up.
     
  7. Riffraff12571

    Riffraff12571 Senior Member

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    They are great, which is why they are still in mine. More headroom, more bottom. Very similar to 6L6 tubes. I ordered mine from a seller in Eastern Europe on Ebay. It took almost a month to get them but I ordered a match pair so I could use them in other amps (it's not so important in the Tweaker). They came with detailed test results which was nice. They are also very inexpensive. Just look for a seller with a lot of transactions and positive feedback and take the plunge. I was told by others that recommended them to me that the '70s tubes have the best tone.

    Side note: You need to temporarily remove the top vent from the amp to get them in the sockets but once they are in you can reinstall the vent.

    [​IMG]
     
  8. xsouldriverx

    xsouldriverx V.I.P. Member

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    Yeah make sure they are the philips U.S. Made JAN Philips 5751 they have sovs or syls but they arnt as good. It also seems the price has gone up a bit since last buying them. When i get my amp im going to roll them and the jj 12ax7 seeing its a high gain amp (a phaez modeled after the brown eye by friedman, see phil x demo for details). The philips are supposed to be at 70% gain but many say that it doesnt take much off from a 12ax7.
     
  9. LesterNtele

    LesterNtele Senior Member

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    I have my first Tweaker 15 on the way (used) and I am looking forward to many responses on this thread. I prefer the gritty Blackface tone rather than a creamy sound. It sounds like the JJ 6V6s power tubes will clean it up nicely.
    Any particular preamp 12ax7's you find that keep it bright & chimy?
     
  10. ibanezcollector

    ibanezcollector Senior Member

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    All my 12ax7s are en route but these jj5751's are so yummy it's going to have to really floor me to switch back to 12ax7s

    Will report back when they arrive :)
     
  11. sj250

    sj250 Senior Member

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    I've tried Ruby 6v6's, Groove Tubes 6v6's, JJ EL34's but the absolute best sounding overall tube has been 5881's!
     
  12. ibanezcollector

    ibanezcollector Senior Member

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    Can you explain what you did an didn't like about the tubes helps everyone
     
  13. mmd

    mmd Senior Member

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    i have been using JJ EL34s for power tubes in mine, and have been very pleased. i am still using the stock preamp tubes. it sounds great cranked up.
     
  14. dleuen

    dleuen Senior Member

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    I have a set of JJ 6V6S Tubes in my Tweaker. Very nice across all three tone stack settings. I tried Groove Tube EL34s but was not too happy with that.
     
    1 person likes this.
  15. ibanezcollector

    ibanezcollector Senior Member

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    Ok so far my favorite combination with the tubes I have bought so far is..

    JJ6L6S in the power section
    JJ12AU7 in V1
    Sovtek 12AX7LPS in V2
    JJ5751 in V3

    This setup gives me greater control over the gain/volume and really yields a nice smooth tone since I am using pedals as my distortion/overdrive.

    I got my JJ EL34s coming Wednesday and a Pair of Russian 70's NOS 6P3S's coming in from Russia!
     
  16. ibanezcollector

    ibanezcollector Senior Member

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    Just put the JJ EL34's in and let me tell you its a tight squeeze haha, you got to take the top grill off and load them from the top of the amp.

    There is literally maybe a few mm's of space between the top of the tube and the grill.

    ITS TIGHT haha but they fit.

    I will report back with some more details on sound when I get more time to play with them tonight after work.. Took lunch to put them in haha.

    Couple quick iPhone pics.

    [​IMG]
    [​IMG]
    [​IMG]
     
  17. LesPaulOnTheBrain

    LesPaulOnTheBrain Member

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    Quick question relating to this thread as I have a Tweaker 15 AND a big box of tubes that my grandfather left me. They are almost all RCA and there must be 20 or 25 different model numbers in there. My question is, how can I tell what each model number is for and whether they will work in my amp? Thanks and sorry for the semi hijack....
     
  18. ibanezcollector

    ibanezcollector Senior Member

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    well you dont want to just put anything in there, some tubes look alike but are made for different applications.

    Stick with EL34, 6V6, 6L6, 5881, KT66, KT77, for power tubes

    12AX7, 12AU7, 12AT7, 12AY7, 5751 for preamp tubes

    with those you will be ok, anything else you better do some research.
     
  19. ibanezcollector

    ibanezcollector Senior Member

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    Ok so now that I had some time to play with the JJ EL34s in the amp, I have to say I really really like them. I wasnt sure I would but man do they sound good with the 5751's in V1 and V3.

    Nice midrange growl, tighter bass and I think this amp is inherently dark to begin with so tightning that bass up was a nice change. Highs are not as chimey as the JJ 6V6s but they are SMOOTH!

    I dig them but still on the honeymoon period so I will report back in a few days.

    on a side note is they take a lot longer to warm up then the 6V6's as well. So hold off on that standby for a few extra seconds before playing.

    [​IMG]
     
  20. xsouldriverx

    xsouldriverx V.I.P. Member

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    There are some other numbers you can use, i believe something like ecc83s are sometimes used in place of 12ax7s . This may me manufacturer specific , but I would hate for you to miss out on sold cool tube sounds. If you find something that looks like it will work but are unsure Post here if you have questions, people love to help around here.
     

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