HELP - Dr Z Blowing Fuses!

Discussion in 'Amps and Cabs' started by bmorelli, Apr 26, 2008.

  1. bmorelli

    bmorelli Member

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    So, three weeks ago I powered up my Dr Z MAZ Jr 212 (non-reverb) and blew the 1/2 amp fuse. I replaced the fuse and changed out the power tubes. I played the amp again for about 20 mins, put it on standby and when I turned it back on it blew the 1/2 amp fuse again.

    At this point I ordered a new rectifier and just installed it today, but upon power up the amp immediately blew the 2 amp fuse. I'm not sure what to do, and any advice is appreciated! thanks!
     
  2. iggs

    iggs Member

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    Contact Dr. Z. He's quick to reply and will help you out if he can over e-mail.
    Also, post on the Dr. Z forum ... lot's of quick help over there (Myles is quick to reply to any technical issues).

    http://drzamplifiers.proboards41.com/
     
  3. Dr. Tweedbucket

    Dr. Tweedbucket Deluxe model available !!!11

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    I hope you are not running a Sovtek rec tube. It is pretty well documented that these are problematical in the Dr.Z amp..... or in any amps if you ask me. Mine did the same thing until I changed it out.

    Rather than stress the amp out anymore, you should probably call the Dr. and see what his opinion is. :confused:
     
  4. bmorelli

    bmorelli Member

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    thanks guys, i emailed the good doc, and posted on the z forum. i actually changed the stock recto from the sovtek to a jj.
     
  5. bmorelli

    bmorelli Member

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    one issue solved, another appears...

    so i had the recto installed the wrong way - DOH! I put it back in the proper way and I'm able to get sound from my guitar through the amp, but the amp now has a "woosh" or "ocean" kind of sound when either the volume or master is up even a little bit on the amp - this happens when the guitar volume is up or down. I hope I didn't hurt anything when the recto was in the wrong way! Thoughts???
     
  6. mbratch

    mbratch Member

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    In a different thread I asked people what their favorite new production GZ34 was and I got two replies. Both said "Sovtek". :messedup
     
  7. mbratch

    mbratch Member

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    If you don't mind my asking, how did you get the rectifier in the wrong way? Did the key break off?
     
  8. bmorelli

    bmorelli Member

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    no, the key didn't break, it just kinda went in? i'd never changed a recto before (obviously) and i thought it would go in like a power tube.
     
  9. tele_jas

    tele_jas Member

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    My amp tech told me that JJ's are some of the best rectifier tubes, but to "be careful with JJ rectifier tubes, they can go in wrong"!

    Sure enough, I could put mine in in more than one position....... the correct way was easier to slide in, but the other ways still went in pretty easy.

    So yeah, I can see how this will happen.
     
  10. bmorelli

    bmorelli Member

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    according to myles, tube guru, in the z forum, "you may have taken out the choke resistor when the rectifier was inserted improperly."

    so, not sure what i'm going to do now? anyone know a good amp tech in tampa?
     
  11. Red Planet

    Red Planet Member

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    Contact Nikcha on the PPBB he lives down there and can shoot you to a good Tech. He is a TGP member also.
     
  12. Dr. Tweedbucket

    Dr. Tweedbucket Deluxe model available !!!11

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    I've had two short and take out fuses so far. There is a thread somewhere on the Dr. Z forum about Sovtek Rec tubes and date codes because the Dr. was having so many probs come back to him. :confused: He switched to JJs.

    That is easy to do.... I was in a room that wasn't lit well and I couldn't see the notch. I thought I felt the tube drop into the notch, so I pressed it in.... but it was in wrong like what you did. Hope you get it sorted out.
     
  13. bmorelli

    bmorelli Member

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    thanks, it's getting there. i changed out the pre-amp section, but i've noticed that i'm picking up a radio station, lol. this happened to someone else on the dr z forum, and doc suggested getting a ferrite choke from radio shack. i guess that's where i'm at now too :)
     
  14. bilbal

    bilbal Member

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  15. bmorelli

    bmorelli Member

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    i just installed a brand new jj recto three days ago, and i don't doubt the merits of a nos rectifier i'm thinking the issue lies elsewhere.
     
  16. GregoryL

    GregoryL Supporting Member

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    Ted Weber makes a solid-state rectifier replacement, which is a good solution also. You'll find a number of owners on the Dr. Z forum use them as well.
     
  17. bmorelli

    bmorelli Member

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    yeah, i've thought about that too, but i'm a "tube guy" at heart - even with their flaws!
     

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