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12AV7 / 12AY7 ...anyone use these ? which are best? tweed amps

Discussion in 'DIY Amp Forum' started by franklyn13, Aug 9, 2019.

  1. franklyn13

    franklyn13 Strat-Talker

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    can anyone describe if any benefits of using these tubes in a 5e3 or a 5e5 amp ?...I popped 2 usa ge 12ay7's in my 5e5 build and the sound is awesome...just bought a 12av7 for ****s and giggles to find out what they can offer...they really tame the 5e3 type volume thing...are the "currently made" tubes out there comparable with the nos usa made variety? or are they like mud?
     
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  2. Grux

    Grux Strat-O-Master

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    As far as I'm aware the preamp tube models change the amount of gain your power section sees. I'm no expert I use some 70's era GE 12ax7's in one of my amps and JJ's in everything else.
     
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  3. PCollen

    PCollen Senior Stratmaster

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    I'd go with a 5751 in the V1a/b stages first before a 12ay7. But it all depends on what tone you are shooting for. Some have suggested a 12ay7 in V1 and a 5751 in V2. Again, it all depends on the amp and the tone you want...it would castrate a Mesa Boggie. I have no use for a 12av7
     
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  4. Antstrat

    Antstrat Senior Stratmaster

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    I use a 12AY7 in V1 on my Bassman & Blues Deluxe and just like you said it tamed the volume but still sounds great. I forget which is which but one is a JJ and the other a Mesa and they work just fine without spending a ton of money on tubes.

    Tubes: another rabbit hole of experiments and money! When I bought my Vox ac10 there where lots of people that said "oh my gosh, toss the stock tubes and get JJ's it'll sound better". So I did and it sounded like crap! Put back the stock shuguang tubes and it sounds great. Trial n error, personal taste and your ears. Oh, and your wallet.
     
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  5. Antstrat

    Antstrat Senior Stratmaster

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    @fezz parka to the white courtesy phone.

    He's the man for 5e3 amps n such.
     
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  6. mad axe man

    mad axe man Senior Stratmaster

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    7025 are my favs... i notice a big difference from a 12ax7 in a rivera superchamp
     
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  7. amstratnut

    amstratnut Peace thru Music. Strat-Talk Supporter

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    Ive tried 12at7 and 12ay7 and decided it lowered the gain from the preamp, mraning it didnt have as much gain coming out of power amp and thinned everything out.

    But not in a deluxe circuit. In a hrrd.
     
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  8. archetype

    archetype Senior Stratmaster

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    @franklyn13 since you specified the 5E3, it was designed for the 12AY7. When cranked, the tone is big and ratty enough without introducing more from the additonal gain of a 12AX7. The 12AY7 retains a warm clean at lower volumes.

    Opinions abound, but IMO you'll need new old stock 12AY7 tubes. Not plentiful, not cheap.
     
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  9. fezz parka

    fezz parka Making a record.... Strat-Talk Supporter

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  10. franklyn13

    franklyn13 Strat-Talker

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    different bias?...
     
  11. franklyn13

    franklyn13 Strat-Talker

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    jj eh?
     
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  12. Fatmaninthebath

    Fatmaninthebath Strat-Talker

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    I bought 5 NOS 12AV7s once. They were cheap and I thought I would give them a try. All 5 were very microphonic
     
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  13. franklyn13

    franklyn13 Strat-Talker

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    I use distortion or boost pedals always ...the lower factor tubes cut down on annoying noise it seems... I was hoping I could try a 12av7 because they are cheap and usa made...like you mentioned also about the same ampl. factor as y7's...I mean....popping one in isn't gonna fry something is it?:thumbd::thumbd::thumbd::thumbd:
     
  14. fezz parka

    fezz parka Making a record.... Strat-Talk Supporter

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    Sure. Also I've bought old pulls that had more than enough life in them off of eBay.

    I've tried 5965's (12av7) and honestly they sound like crap in a 5e3 or other tweed circuit. They're not really meant for audio. Microphonic, harsh, require a rebias and plate voltage tweak. Not worth the trouble...even if they were free.
     
    Last edited: Aug 10, 2019
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  15. franklyn13

    franklyn13 Strat-Talker

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    oh well ...blew 7 bux on an NOS RCA V7 then...shuxx !!:(:mad::thumbd:
     
    Last edited: Aug 10, 2019
  16. franklyn13

    franklyn13 Strat-Talker

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    I wouldn't plug it in v1...I didn't think at the low voltage it would matter that much....just a little higher current to run it really...what the heck...bought it already...I'll try it...if I don't like it oh well :(:confused:
     
    Last edited: Aug 10, 2019
  17. The-Kid

    The-Kid Most Honored Senior Member Strat-Talk Supporter

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    Mainly it thins out the tone stack.

    Want less gain....lower the gain knob...


    Less volume....um use your guitae volume....


    God invented those two things for good reason....


    Lets not take it for granted.


    But yeah same position.


    IMO using anything other than a 5751 or 12AX7 is killing your amps tone.
     
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  18. AlexJCRandall

    AlexJCRandall Senior Stratmaster

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    I've only ever done the 12Ay7 thing in my 5E3 clone build.

    Mainly as I looked extensively online at practically every thread I could load up about the benefits of various tubes and other mods to make the amp work well with a variety of guitars.

    Most who'd tried other tubes changed back, that shift was almost 100% for those who'd gone for an ax7 in V1.
    I think it's probably a fair assessment that practically every 5e3 owner is about that iconic vintage tone. Which is with the AY7.
     
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