Build Thread - Tweed Princeton | The Canadian Guitar Forum

Build Thread Tweed Princeton

Discussion in 'Amp Building/Technical/Repair' started by RBlakeney, Jan 12, 2020.

  1. RBlakeney

    RBlakeney Gold Member

    Joined:
    Mar 12, 2017
    Location:
    Halifax, ns
    I figured this would be a fun way to electrocute myself.
    901DFA70-44C5-49C5-9FDD-6635FC4A7F1E.jpeg 336ED87C-F12E-4843-9770-BB27AAF363DC.jpeg CEB973B4-CF5F-47AA-B531-3AEB7560043B.jpeg
     
    keto, johnnyshaka, Lincoln and 2 others like this.
  2. greco

    greco Gold Member

    Joined:
    Jul 15, 2007
    Location:
    Kitchener, Ontario
    Nice looking work!

    That chassis is certainly packed.
     
  3. cboutilier

    cboutilier

    Joined:
    Jan 12, 2016
    Location:
    Halifax, NS
    Indeed. If not going for authenticity, I'd always reccomend building a Champ/Princeton in a Deluxe sized chassis and cab.
     
    greco likes this.
  4. RBlakeney

    RBlakeney Gold Member

    Joined:
    Mar 12, 2017
    Location:
    Halifax, ns
    There’s actually a decent amount of room, and much bigger than the champ chassis. I left some wires longer as it was my first time, and I wanted to make sure I didn’t make an irreparable error.
    this is the inside of my 57 custom champ. AC826E14-CE6F-4D1B-9A19-7C1CAF62DA84.jpeg
     
    _Knighthawk_ and greco like this.
  5. Lincoln

    Lincoln Gold Member

    Joined:
    Jun 2, 2008
    Location:
    Fort Saskatchewan, Alberta
    I agree, the tweed champ is the worst chassis to work in. The Princeton is must better.

    You can also take tweed Princeton chassis, make a second 6V6 tube socket hole in it, and build a Harvard. :)
     
  6. RBlakeney

    RBlakeney Gold Member

    Joined:
    Mar 12, 2017
    Location:
    Halifax, ns
    The only appropriate way to test was through a 412. 285727FA-4984-4429-A320-EFC6D58A4AD0.jpeg
     
    greco, keto and Lincoln like this.
  7. _Knighthawk_

    _Knighthawk_ Gold Member

    Joined:
    Mar 2, 2014
    Location:
    Burlington
    And? How did it go?

    As an aside, not an important question but I am curious: what drawing were you working from?
     
  8. RBlakeney

    RBlakeney Gold Member

    Joined:
    Mar 12, 2017
    Location:
    Halifax, ns
    It went well. It’s a mojotone kit, so I went with the picture they send, with a few pictures and question sent to my buddy dr Dan when I was confused. I’m starting another one which will likely be a little neater since I have one to work from now.
     
  9. _Knighthawk_

    _Knighthawk_ Gold Member

    Joined:
    Mar 2, 2014
    Location:
    Burlington
    Nice! And, BONUS: you didn't electrocute yourself!!! :)
     
  10. RBlakeney

    RBlakeney Gold Member

    Joined:
    Mar 12, 2017
    Location:
    Halifax, ns
    It also didn’t catch on fire, which was a plus. I also didn’t burn myself 75 times like I did building a klone.
     
    Lincoln, _Knighthawk_ and greco like this.
  11. RBlakeney

    RBlakeney Gold Member

    Joined:
    Mar 12, 2017
    Location:
    Halifax, ns
    Finished the second one. Another plus.

    my he second one doesn’t work. Minus.
    0E0000FC-1393-4EF5-B8A1-5A67FD3B3795.jpeg
     
    greco likes this.
  12. Lincoln

    Lincoln Gold Member

    Joined:
    Jun 2, 2008
    Location:
    Fort Saskatchewan, Alberta
    Check your pin #1 on the 12AX7, make sure you have about 200 volts there, other wise you missed a jumper wire under the board. Easy mistake, I've made it. :)
     
  13. RBlakeney

    RBlakeney Gold Member

    Joined:
    Mar 12, 2017
    Location:
    Halifax, ns
    Sounds like a tomorrow issue. I’ll likely bring it to dr Dan to set me back on track.
     
  14. RBlakeney

    RBlakeney Gold Member

    Joined:
    Mar 12, 2017
    Location:
    Halifax, ns
    I’m very angry.
     
  15. keithb7

    keithb7 Gold Member

    Joined:
    Dec 27, 2006
    Location:
    West Canada
    Looks good. You may want to consider switchable negative feedback. A great addition to the 5F2A circuit. For good growl at even lower volume.

    A while ago I had a crackling noise develop in my 5F2A build. I could see arcing in the 6V6. I found some resistors had broken up. They appeared ok. A chopstick test revealed the problem. I removed them and they came off the board in pieces. Upon replacement and reassembly I had created a new problem somehow. I was scratching my head. I went over everything. I lifted the board too. Not fun. I replaced a few more things. Cleaned up my lead dress further. Blew everything out with compressed air. Thinking a piece of wire strand may have found a home in an inconvenient spot. Nope. 3-4 days worth of evenings, troubleshooting later, I was frustrated. Finally. Eureka. I found the problem. One lead from a resistor somehow was pushed into a wrong eyelet and soldered there. I did it. I caused myself heartburn. I found it. Fixed it and all was well.

    Self taught humility and the art of learning to be humble, is much easier when other people are not involved.

    For entertainment purposes only, here is what I pulled out:

    Resistors.JPG
     
    Last edited: Jan 19, 2020 at 12:33 PM
    jb welder and greco like this.

Share This Page