6G3 Deluxe build

Discussion in 'Ampage Area' started by Uncle Daddy, May 3, 2021.

  1. Uncle Daddy

    Uncle Daddy Friend of Fred

    Jan 19, 2012
    Maldon UK
    I'd forgotten about these pics that I took during a recent amp build. It started as a TAD kit, with one-off turret boards made by Mike at Modulus. I also swapped the resistors for metal film for quietness, and it turned out very well. I'd recommend one of these if you're looking for a next project after a 5e3; the circuit is pretty straight forward and there's lots of room to work in the chassis.
    Like the 5e3, you do have to turn up the tone knob a lot a low volumes, and they're pretty sensitive to the guitar settings. The trem is tube-bias wiggle, and gets a throb on it that would make a bride blush.

    Filter caps and dropping resistors

    Bias board, with a man-size diode

    Main board - the small orange drop on the right filters out highs for the normal channel

    Main board in place

    Volume and tone controls
  2. Uncle Daddy

    Uncle Daddy Friend of Fred

    Jan 19, 2012
    Maldon UK
  3. Uncle Daddy

    Uncle Daddy Friend of Fred

    Jan 19, 2012
    Maldon UK
    And the final result-

    cowmoo, Floo, hcsterg and 10 others like this.
  4. Uncle Daddy

    Uncle Daddy Friend of Fred

    Jan 19, 2012
    Maldon UK
    I've added the "immortal amp" diodes to the rectifier socket, and need to go back in at some point as I used a 230v tap instead of the proper 240v, and I may change the 0.003uF cap on the v1 plate resistor for a 0.001uF as the Normal channel is a little dark for me. It's a great hiss filter though, no tube hiss gets through.

    I'm running a low sensitivity speaker at the moment as I wanted early breakup, but this thing is still loud, as in 20 hairy chested Fender-watts loud. There is no hiding place with this amp!

    Breakup begins around 5 on the dial on input 1, and it gets thicker and more Marshall-like as you go further round. Like a tweed amp, set it open and control the breakup with the guitar's volume knob. Just wear ear plugs!
  5. Dana Rudd

    Dana Rudd Country Gent

    Nov 26, 2019
    Greybull, WY
    Looks great, wish I had the talent to do that type of work. Enjoy it.
  6. Gretschtim1

    Gretschtim1 Country Gent

    Dec 4, 2012
    Dundalk, Md
    Crank it up to 8, plug in a Gibson and play Cat Scratch Fever...:D. I built mine last summer and was surprised when I heard how it goes into early Marshall territory when you push it.
  7. loudnlousy

    loudnlousy Gretschified

    Oct 18, 2015
    Cool project. A friend of mine just built another 5E3 and it is a fabulous and versatile amp.
  8. Ricochet

    Ricochet Senior Gretsch-Talker

    Nov 13, 2009
    Monkey Island
  9. AZBrahma

    AZBrahma Gretschie

    Dec 18, 2020
    Looking great. I would like to build a few more myself, problem is that I don't actually use them because I've gone to the dark side with a Tech 21 PSA 2.0. But I do love building amps and effects.

    And yes, that is in fact a man-diode!
  10. TubeLife

    TubeLife Synchromatic

    Jan 23, 2020
    Very nice build!! This is going to be my next build as I thought about this or a Princeton....I’m leaning towards the 6G3.

    I recently built an AB763 Super Reverb. It’s a great and humbling experience.....especially when it turns on and functions properly :D
    MotorCentaur likes this.
  11. Back in Black

    Back in Black Country Gent

    Jun 22, 2020
    Ontario Canada
    Uncle Daddy likes this.
  12. hcsterg

    hcsterg Friend of Fred

    Feb 13, 2012
    Neat job, @Uncle Daddy ! :cool::cool::cool:

    What do you mean by :
    o_O ?

  13. Synchro

    Synchro The artist formerly known as: Synchro Staff Member

    Jun 2, 2008
    Admin Post
    I can tell that it sounds great, just from the picture. :) That has to be a sweet little amp.
    Uncle Daddy likes this.
  14. markeebee

    markeebee Country Gent

    Neat work Unca. Fastidious, even.

    I'm guessing diodes in series with the rectifier valve to protect against shorts.
    Uncle Daddy and hcsterg like this.
  15. hcsterg

    hcsterg Friend of Fred

    Feb 13, 2012
    Yes, that's what I was thinking about too : protection diodes... I saw this on Fender Tweed Custom Shop amps Deluxe, EC, among others.

    These diodes are certainly supposed to act as fuses, intended to blow in the eventuality of the rectifier valve would go shorted, which barely arises IMHO : I only saw one time a 5Y3GT with a plate to filament short in 40 yars of amp repair and build...

    But it's me, OK ? :D

  16. Uncle Daddy

    Uncle Daddy Friend of Fred

    Jan 19, 2012
    Maldon UK
    The 6g3 will give you a very different sound from the Super Reverb. It'll save your back too!
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