The Official "I Built This Amp" Thread | Page 3 | The Canadian Guitar Forum

The Official "I Built This Amp" Thread

Discussion in 'Amp Building/Technical/Repair' started by GuitarsCanada, Jul 8, 2014.

  1. marcos

    marcos Gold Member

    Joined:
    Jan 13, 2009
    Location:
    Canada
    Very nice Milkman. Good looking cab and i'm sure it sounds just as good as it looks.
     
  2. epis

    epis

    Joined:
    Feb 25, 2012
    Location:
    Ottawa, Ontario
    This is my most recent project. Custom 5 Watts, single ended output stage, EL84 or 6V6 in the output, reverb and tremolo, foot switchable clean and drive channels.
    Soundwise a cross between Marshall, Vox and Fender, beautiful sparkly clean of Vox with reverb and tremolo of Princeton goes up to crunch and drive of JCM800.
    Cabinet was made out of pine, covered with real tweed, shellacked and clear coated with satin polyurethane.
    Faceplate was done by nice guys from Mementos in Stitsville, anodized aluminum. IMG_8424.JPG IMG_8425.JPG IMG_8427.JPG
     
    alwaysflat and scoltx like this.
  3. scoltx

    scoltx

    Joined:
    Mar 31, 2013
    Location:
    Woodstock, Ontario
    @epis I haven't used real tweed yet, how did you like working with it, how did it compare to working with tolex? Nice build BTW.
     
  4. epis

    epis

    Joined:
    Feb 25, 2012
    Location:
    Ottawa, Ontario
    Thanks Scoltx, I love tweed. Comparing to tolex, work is more time consuming, but it's not more difficult.
    I'm using carpenters glue, it gives you time to align the pieces. Working with corners is easy, use pinch technique and cut extra material with sharp scissors.
    I use wood sealer before applying shellac. Zinser shellac is best, do not bother with flakes. I did try both.
    I even wouldn't bother diluting it, two coats is equal to 6 coats diluted 50/50 with ethanol or methyl hydrate.
    Rubbing it in with folded piece of cloth works better than using the brush.
    If you wanted a smooth not shiny finish, even satin poly will show gloss of shellac.
    What I do is scrubbing the poly within 15 to 20 minutes with scotch brite while it's not cured (hardened) completely.
    At the end you'll have very nice, scratch resistant surface, very hard and not dampening wood resonance.
    Cheers, Damir
     
    scoltx likes this.
  5. blueshores_guy

    blueshores_guy Gold Member

    Joined:
    Apr 8, 2007
    Location:
    Grand Bend, Ontario
    Well, I'm not nearly as adventuresome as most of you, but I did manage to put together a Trinity Tramp kit.
    Fun build. Guts look like this.....

    [​IMG]

    I've posted this picture before, but it's the only decent one I have showing the finished product in its cabinet (also supplied by Trinity Amps-minus the logo, of course).

    [​IMG]

    The Mesa 1x12 is gone, replaced by a Vox 2x12 which suits the amp much better.
    Replacing the JJ's supplied in the kit with a Winged 'C' 6L6 and a Tung-Sol 12AX7 made a HUGE improvement in tone. This little amp with a 6L6 puts out about 12 watts, and can get amazingly loud.
    But 99.9% of its life is spent in my home office/studio, where I noodle around and do some recording.
     
  6. epis

    epis

    Joined:
    Feb 25, 2012
    Location:
    Ottawa, Ontario
    This is complete remake of Cobra mk2 amp from 70s, I was asked to add master volume end effect loop at first, but it finished as full rebuild with added master, buffered effect loop and EF86 channel to existing diagram (copy of Fender Princeton reverb sans reverb ;) )
    These amps, cobra is same as riviera 725 from pepco, are cool amp, but very noisey (hum) , with poor tubes layout and heather wiring.
    Amps is very quiet now (at idle LOL), very loud for two 6V6 in the output.
    IMG_8507.JPG IMG_8508.JPG IMG_8510.JPG

    IMG_8515.JPG

    If I had to do same job again, I would make a new chassis, it was a hassle to reuse existing one.
     
    Last edited: Nov 29, 2015
  7. traynor

    traynor

    Joined:
    Sep 14, 2012
    Location:
    Kawartha Lakes
    I modded this old Bassmaster into a two ch Ampeg B15N using 5691,6550 tubes and a NOS B15S output transformer.

    B15N 50W face.jpg B15N 50W guts.jpg B15N 50W .jpg
     

    Attached Files:

  8. TeleToons

    TeleToons

    Joined:
    Aug 13, 2014
    Location:
    Hamilton, Ontario
    Just beautiful work guys.
     
  9. TeleToons

    TeleToons

    Joined:
    Aug 13, 2014
    Location:
    Hamilton, Ontario
    I think we need a secondary thread for those of us "also ran" builders lol.

    Here one of mine so far. A savage Croaker from Wattkins Amp Forum, sitting on a 1 x 12 with a Celestion Type A in it (Church Audio Supplied) and a Hammond M3 Grill cover
     

    Attached Files:

  10. mccormickanalog

    mccormickanalog

    Joined:
    Aug 11, 2015
    Location:
    Ottawa
    Digging this thread! Can't wait to contribute!
     
  11. mhammer

    mhammer

    Joined:
    Nov 30, 2007
    Location:
    Ottawa, Ontario
    As usual, lovely work, Damir. I actually picked up a "Cobra" head from a Songbird garage sale (back when they were Songbird), and keep meaning to rebuild it into something else. Right now, the contenders are brownface Vibrolux, Tremolux, Deluxe, or Princeton. But I'm also wondering about other possibilities. In your experience, is the power transformer capable of powering another 12AX7 on top of the two already in there?
     
  12. epis

    epis

    Joined:
    Feb 25, 2012
    Location:
    Ottawa, Ontario
    Thanks for kind words Mark . There is definitely enough spare power in that power transformer for your project. I would suggest another chassis, it's easier to build new one than reuse existing one.
     
  13. mhammer

    mhammer

    Joined:
    Nov 30, 2007
    Location:
    Ottawa, Ontario
    This would be my first attempt at something like this. What, in particular, makes reuse of the existing one difficult?
     
  14. epis

    epis

    Joined:
    Feb 25, 2012
    Location:
    Ottawa, Ontario
    Tubes layout, heater wiring...
    I like to start with nice layout, so no unpleasant surprises at the end.
     
  15. epis

    epis

    Joined:
    Feb 25, 2012
    Location:
    Ottawa, Ontario
    "D" Amp - my most recent project :

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]




    [​IMG]
     

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