New Amp Day: Ampeg Gvt15-112 Combo

Discussion in 'Other Amps' started by 67Mopar, Feb 23, 2019.

  1. 67Mopar

    67Mopar Well-Known Member

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    Welcome back, 1975! :usa:

    [​IMG]
     
  2. StratoMarshall

    StratoMarshall Well-Known Member

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    Nice score! Back in the day I used to have a V4.
     
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  3. 67Mopar

    67Mopar Well-Known Member

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    The GVT captures the V4 sound. Same topology. Some complain about the stock Celestion Seventy 80 speaker, but it sounds pretty good to me. It's not the most "musical" speaker, but I can see where some players would take to it. Very hi-fi sounding. I doubt any speaker could sound bad in a GVT15, but I'm going to install a Celestion Alnico Cream.
     
    Last edited: Feb 23, 2019
  4. ampmadscientist

    ampmadscientist Well-Known Member

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  5. 67Mopar

    67Mopar Well-Known Member

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  6. stringtree

    stringtree Well-Known Member

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    Congrats 67Mopar on the New Amp! :dude:

    Some clean and blues tones that I found.
    (not me)



    Some dirty tones of a head version.
    (not me)

     
    Last edited: Feb 23, 2019
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  7. 67Mopar

    67Mopar Well-Known Member

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    I have a head version, which needed a factory update to fix the effects loop hum. This one doesn't exhibit any hum at all. I also have a spare GVT15 replacement board, that I picked up when Loud Audio sold-off their remaining Ampeg parts. I want to trace the circuit, and hopefully build a hand-wired clone... just for fun.
     
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  8. 67Mopar

    67Mopar Well-Known Member

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    Thanks! I love these amps, obviously. From Jeff Beck, to Alvin Lee, Pat Travers, Mick Ronson, Luther Grosvenor, Faces, Rolling Stones, Humble Pie, Peter Frampton, Mike Bloomfield, Aerosmith, Albert King, Johnny Winter, Black Oak Arkansas, Foghat, ZZ Top, The Cars... the tones are there!
     
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  9. stringtree

    stringtree Well-Known Member

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    Yea, ya got me jones-in for one! LOL

    I just put it on the list! :metal:

    Thanks for sharing something so cool!
     
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  10. 67Mopar

    67Mopar Well-Known Member

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    There's one at Guitar Center, but the cabinet looks ruff. Could just be the pics, but I don't think so. I'd wait for a good one. There are two versions... Made in Korea and Made in China. I've seen pics of the circuit boards, and the Korean made model looks better. Loves pedals!

    https://www.guitarcenter.com/Used/Ampeg/GVT15-15W-1x12-Tube-Guitar-Combo-Amp-115080155.gc
     
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  11. anitoli

    anitoli Well-Known Member

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    It's always fun to fool around with different amps, you never know what you'll get until you play them a bit.
     
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  12. 67Mopar

    67Mopar Well-Known Member

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    Bruce Zinky once said to me; "If you plug into an amp, and can't get good tone within 5 seconds, buy a different amp." I though this was extreme, but then realized... he's right! All the amplifiers that I own, and the ones I'd like to repurchase, sounded great right away. Any amp that required a lot of dialing and switch fiddling, never lasted more than a one week. The Boogie Mark IV tops the list. This isn't to say that such amps are sub-par... I just think that some circuits are designed with studio use in mind, vs live play.
     
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  13. RiverRatt

    RiverRatt Well-Known Member VIP Member

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    Congrats! I saw one at Guitar Center in Memphis yesterday and almost gave it a demo. I love the silverface Ampegs.
     
  14. grainman

    grainman Well-Known Member

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    its not exactly what happened with the china versus Korea or vice versa....the Korean one that everyone tend to say they have a better circuit board its just by the look of it ....china actually had the real ¨on off ¨switch from the 70's and the board they put some sloppy glue everywhere and its looking bad but I had a Korean one which I liked a lot but the on off switch was so fragile ..its a very good think they upgraded for the real deal ...I can't really say if theres a difference tone wise but im waiting for my new purchase , a made in china gvt15-112 ...I'll let you know
     
  15. South Park

    South Park Well-Known Member

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    You have to understand tubes if you want great tone .
     
  16. pedecamp

    pedecamp Well-Known Member

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    Ampeg had some really nice solid state amps in the late 80's, a buddy of mine got a 2x12 combo that sounded awesome its still his main amp today, I couldnt afford one so I got a Crate 2x12 combo :(
     
    Last edited: Oct 13, 2019
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  17. South Park

    South Park Well-Known Member

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    Ampeg built a 300 watt tube base amp proto type . And lent it to The Rolling Stones for the 1969 us tour. A tube tech went with the amp the whole tour to maintain the amp. And you think your job sucks
     
  18. Goldfinger

    Goldfinger Active Member

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    A "real" on/off switch? Please clarify. I've never opened a China made GVT. I have one GVT15 head, and one "effects loop hum modified" GVT15 circuit board. Both are Korean made.
     
  19. grainman

    grainman Well-Known Member

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  20. DoubletonguED

    DoubletonguED New Member

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    Hey 67Mopar,
    funny you have the intention to do a handwired clone of the GVT15 as I do too... but I'm playin' with the idea to beef it up to 4x 6V6 power amp with cathode bias for around 30 Watts. I imagine that to be perfect. But in a first step I would omit the half-power-option, reverb and effectsloop... at least til the main circuit is alive.
    I got the schematic from Ampeg for the GVT15. I emailed them and to my surprise they really sent it to me. PM me, if you're interested. So you could save the effort to trace the pcb by hand.
     

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