1. Win a Broadcaster or one of 3 Teles! The annual Supporting Member Giveaway is on. To enter Click Here. To see all the prizes and full details Click Here. To view the thread about the giveaway Click Here.

Need help; 5F1 build completely dead.

Discussion in 'Shock Brother's DIY Amps' started by teek_s, Sep 21, 2020.

  1. jmp81sc

    jmp81sc Tele-Meister

    Posts:
    318
    Joined:
    Feb 6, 2015
    Location:
    Orange County
    Good that you found that. Don't be sorry, i've done 4 builds and still don't know much.

    Read, watch videos, learn how to read schematics and layouts, look at other builds; it'll start making sense. My best resources are Rob Robinette's site and Uncle Doug utube channel.

    John
     
    jtcnj and teek_s like this.
  2. awasson

    awasson Poster Extraordinaire Gold Supporter

    Age:
    56
    Posts:
    5,680
    Joined:
    Nov 18, 2010
    Location:
    Vancouver
    So... Is the amp still dead or did you manage to get it sorted out?
     
    teek_s likes this.
  3. teek_s

    teek_s TDPRI Member

    Age:
    21
    Posts:
    33
    Joined:
    Sep 21, 2020
    Location:
    United States
    The amp now turns on now!

    The amp itself still isn't fully functional, as whenever I attempted to turn it on with a 12ax7 the fuse as well as the rectifier tube blew. I believe it was due to improper grounding which has now been fixed. I'm waiting on a few new fuses, as I didn't have any extra on hand. I'll give updates if any more hitches are encountered along the way. Thank you very much, awasson!
     
    awasson likes this.
  4. King Fan

    King Fan Poster Extraordinaire

    Posts:
    5,737
    Joined:
    Jan 1, 2013
    Location:
    Salt Lake City
    Progress, then. Good for you, and I hope you're right, and you've fixed the fault that was blowing fuses. Did you ever build a light bulb limiter? It can detect faults and prevent you going through fuses.

    Keep us posted, either way.
     
  5. Nickfl

    Nickfl Friend of Leo's

    Posts:
    2,280
    Joined:
    May 24, 2016
    Location:
    Florida
    Before you proceed...

    Build.
    A.
    Light.
    Bulb.
    Limiter.

    Fuses are cheap, power transformers aren't. A lightbulb limiter protects both.
     
    Wally, ArcticWhite and James Knox like this.
  6. awasson

    awasson Poster Extraordinaire Gold Supporter

    Age:
    56
    Posts:
    5,680
    Joined:
    Nov 18, 2010
    Location:
    Vancouver
    We’ll be looking forward to a successful update. The nice thing about building your own amp is that you built it and you’ll be able to maintain and keep it running.
     
  7. teek_s

    teek_s TDPRI Member

    Age:
    21
    Posts:
    33
    Joined:
    Sep 21, 2020
    Location:
    United States
    I'll get on it!
     
    King Fan likes this.
  8. King Fan

    King Fan Poster Extraordinaire

    Posts:
    5,737
    Joined:
    Jan 1, 2013
    Location:
    Salt Lake City
    Lots of good LBL info online -- maybe too much? :D We discussed some of the confusion here.
     
    Nickfl likes this.
  9. ArcticWhite

    ArcticWhite Tele-Afflicted

    Posts:
    1,032
    Joined:
    Apr 14, 2009
    Location:
    Portland Oregon
    I'm still confused and concerned by this.
    What is going on with this connection?
    Is it just floating around, uninsulated?

    20200924_030547.jpg

    What's the point of the heat shrink tubing on the neutral wire (white)?

    (And jeez, what were you thinking when you grounded the power cord like that?)

    If you are trying to insulate a soldered connection, you do it like this:
    Slide a piece of heat shrink over one of the wires. Wrap the tinned ends together and solder. Slide the tubing over the joint. Heat it to shrink.

    I think it's better practice to make power connections at a terminal strip, but if you're going to float joints like this, at least insulate them from the chassis.

    Now, about powering up. You don't test a new build by just plugging everything in and turning it on. Everyone make wiring mistakes, and you can easily blow your transformers, explode capacitors, burn resistors, etc.

    There's a startup test procedure. Here is how RobRob does it.
     
  10. Jeru

    Jeru Tele-Holic

    Posts:
    720
    Joined:
    Nov 17, 2006
    Location:
    Chicago
    Teek — you’re going to get hurt unless you learn WTF you’re doing.

    AT A MINIMUM, Watch Uncle Doug’s videos on safety and light bulb limiter. Read Rob Robinette’s safety and startup procedures.

    Until then, go build pedals — a 9v battery can’t kill you.
     
    Wally likes this.
  11. teek_s

    teek_s TDPRI Member

    Age:
    21
    Posts:
    33
    Joined:
    Sep 21, 2020
    Location:
    United States
    It's been insulated. I don't even know how I would try to fit a terminal strip into the 5F1 chassis, honestly.

    Done. All the parts of a lightbulb limiter are coming in a few days, I'll keep you all posted.
     
    jtcnj and dan40 like this.
  12. Wally

    Wally Telefied Ad Free Member

    Posts:
    37,269
    Joined:
    Mar 17, 2003
    Location:
    Lubbock, TX
    ...
     
  13. teek_s

    teek_s TDPRI Member

    Age:
    21
    Posts:
    33
    Joined:
    Sep 21, 2020
    Location:
    United States
    Alright, the amp is finally done and working! It's out of the 2 amps I own right now, it's the quietest. I'm super happy to be done with it after half a year! I'll do some bias testing without the limiter to make sure everything is okay in the tubes. I've also taken all the worry I got about the neutral wire to heart and I've fixed that and another joint like it. I can't thank all of you enough!
     
  14. awasson

    awasson Poster Extraordinaire Gold Supporter

    Age:
    56
    Posts:
    5,680
    Joined:
    Nov 18, 2010
    Location:
    Vancouver
    Great News! Glad to hear you've got it up and running. Now that it's working it's time to plan the next one. This stuff gets a little addictive.
     
    King Fan and teek_s like this.
  15. teek_s

    teek_s TDPRI Member

    Age:
    21
    Posts:
    33
    Joined:
    Sep 21, 2020
    Location:
    United States
    In fact, I already have a price chart for a 5F2A completely done! I think it's time to start saving up, lol.
     
    awasson likes this.
  16. jmp81sc

    jmp81sc Tele-Meister

    Posts:
    318
    Joined:
    Feb 6, 2015
    Location:
    Orange County
    Good deal, glad you got it going. I love my 5f2a, but you may consider a 5e3 deluxe, a little more amp without that many more parts.

    One way I have saved money is by building my own cabinets. You can make a decent cab with just a circular saw, sander and router.

    Take care
    John
     
    jtcnj, awasson and King Fan like this.
IMPORTANT: Treat everyone here with respect, no matter how difficult!
No sex, drug, political, religion or hate discussion permitted here.