Fender Princeton 6g2 build advice

Discussion in 'Shock Brother's DIY Amps' started by Lordsonic, Apr 12, 2020.

  1. Lordsonic

    Lordsonic TDPRI Member

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    20200216_113508.jpg 20200321_103329.jpg 20200410_164750.jpg Hello all, have started in earnest to build this amp. This will be my first build, and I have already been helped quite a bit by members on here, particularly King Fan and Keith B. I 've got some questions about my hammond 291 aex transformer (eu/uk specs) I' ll start however with some pictures of my progress.
     
    Last edited: Apr 12, 2020
  2. Lordsonic

    Lordsonic TDPRI Member

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    20200412_115354.jpg My biggest concern at the moment is going to be wiring the pt correctly. Its is a hammond 291 aex eu/uk spec with options of 240v eu/uk power and secondary vintage 275v. I can see that pairs yellow and red and white (275v) go to the rectifier, pairs green to the pilot. Others I am not quite sure of solid brown and white to on/off? solid black and blue 120 each joined to make 240v uk/eu? green/yellow?
     
    Last edited: Apr 12, 2020
  3. Paul-T

    Paul-T Tele-Meister

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    Last edited: Apr 12, 2020
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  4. Jerry J

    Jerry J Tele-Afflicted

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    Nice looking cabinet - did you build it yourself?
     
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  5. Lordsonic

    Lordsonic TDPRI Member

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    yes built my self, not perfect but I am fairly happy with it.
     
  6. Lordsonic

    Lordsonic TDPRI Member

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    I used an old pedal case, aluminium I think. Was going to test with some solder later. Had to make an adapter as the pt would not fit oversized mojotone chassis. Seems sturdy, should I make it for steel?
     
  7. Jerry J

    Jerry J Tele-Afflicted

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    May not be perfect to your mind but looks good to me. I built two of my own cabinets and like you, they're not perfect BUT they're much nicer than the original Fender particle board/plywood cabinets my amps came with.
     
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  8. BigDaddy23

    BigDaddy23 Tele-Holic

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    @Paul-T is spot on regarding the transformer wiring. Also, go with the 275V secondary. I just finished building mine and used the same tranny. B+ was too high with the 330V option.

    Nice job on the cabinet! I literally played mine for 2hrs straight today! Fab amp.
     
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  9. Nickfl

    Nickfl Tele-Afflicted

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    You're going to solder the adapter plate?
     
  10. Lordsonic

    Lordsonic TDPRI Member

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    just to test, Im not 100% sure its the best material to use, brushed aluminium I think
     
  11. Lordsonic

    Lordsonic TDPRI Member

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    Its nice someone else is using the same pt, is yours the international version?
     
  12. Paul-T

    Paul-T Tele-Meister

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    by the way Lordsonic if you cabinet was built in your kitchen, without the use of one of those swanky huge Yank garage workshops (not jealous honest) then that's great work!
     
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  13. Lordsonic

    Lordsonic TDPRI Member

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    Hi Paul, that was very helpful. just let me check Ive got this. mains cable in: brown (l) to fuse then jumped to L of switch. Blue (n) to right of mains switch. Earth ground to bolt/chassis.
    From pt white and brown connected together. Blue (L) and white (N) connected to switch. Greens to pilot,yellows to rectifier, red/white secondaries rectifier, earth to chassis ground? Does that sound right? not quite sure which is the centre tap?
     
  14. Lordsonic

    Lordsonic TDPRI Member

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    Ha ha, no work shop, just a few power tools and a B&Q workbench!
     
  15. Nickfl

    Nickfl Tele-Afflicted

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    To test what? If it seems strong enough it is fine, you don't need to solder anything to it.
     
  16. Paul-T

    Paul-T Tele-Meister

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    yes that all looks right.

    You have a two-pole switch, and are switching live and neutral? Great.

    Everything else sounds right. [edit: as mentioned earlier, it's brown and black are joined together for the primary, in series for 240V] red-whites secondary taps to your rectifier.

    Red and yellow centre tap goes to smoothing cap, check @King Fan's thread on CT tap.

    A bit like this. I've disconnected mains to fit a cable grip but green/yellow earth would be to earth safety ground near transformer (with lead to spare, so it's last one to go if cable's pulled out), brown to fuse (then switch), blue to switch, my orange and black is your white and blue. My primary taps, brown and white, are joined togethe like your brown and black, taped safely away on the left).

    My red and yellow centre tap goes to main earth tab but as mentioned, better to the first filter cap (mine was jammed too hard under the pot).

    pttransformer.jpg
     
    Last edited: Apr 13, 2020
  17. Lordsonic

    Lordsonic TDPRI Member

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    Ahh.. great stuff, this makes much more sense! thanks a lot!
     
  18. Lordsonic

    Lordsonic TDPRI Member

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    It strong enough, thanks!
     
  19. rjtwangs

    rjtwangs Tele-Afflicted Silver Supporter

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    Your build is certainly looking good!! I love my 1962 6G2, I'll be enthusiastically watching.....
    mine....
    20200412_130514.jpg


    RJ
     
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  20. Lordsonic

    Lordsonic TDPRI Member

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    She's a beaut! All original? Any changes in speakers or valves/tubes? If so which makes?
     
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