1. ramonneke76

    ramonneke76 Member

    Messages:
    198
    Joined:
    Dec 31, 2012
    Hi,

    I have an old rare German amp called Suprem Solist. It sounded real cold and distorted when I got it. Couldn't get any clean sound out of it. Changed the power caps and put new tubes in it. The bias was still real cold (PV 316 and 34mA per tube). I changed the cathode bias resistor (it was a 300 ohm) to a 220 ohm. Still cold and distorted (PV 298 and 46mA per tube) but a bit better. The amp was set on 220V (selector switch for voltage). I put switched in to 240V (i am in Europe) without any problems. Switched it back to 220V. That's were the amp shorted. I saw a flash at the ez81 tube. There was no smoke or a bad smell. Now the amp is dead, nothing lights on. Any ideas? Bye bye power transformer? Any insights of why the amp sounds distorted? Didn't checked the speaker jet.

    I bought it the amp cheap as a project amp. Couldn't find a schematic of the amp. It got two EL34 (new JJ's), EZ81 (new JJ), 3 ecc83, 1 ecc40 (for tremolo).
     
  2. Diablo1

    Diablo1 Member

    Messages:
    622
    Joined:
    Nov 22, 2013
    Look for the fuse and replace it.
    If you blow another fuse, then you have to figure out what's drawing excess current.
    Do you have electronic repair skills?
    If not, then you'll need to take it to someone with skills to fix.
     
  3. ramonneke76

    ramonneke76 Member

    Messages:
    198
    Joined:
    Dec 31, 2012

    There is no fuse in this amp.
     
  4. Diablo1

    Diablo1 Member

    Messages:
    622
    Joined:
    Nov 22, 2013
    This is a German made production amp right?
    I doubt the Germans were so stupid to not include a fuse.
    Look harder and you will find the fuse, try inside the amp chassis.
     
  5. ramonneke76

    ramonneke76 Member

    Messages:
    198
    Joined:
    Dec 31, 2012
    Some pics of the amp. Can't find any fuse.

    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
     
  6. J M Fahey

    J M Fahey Member

    Messages:
    2,162
    Joined:
    May 22, 2009
    The fuse is staring at you, straight in the eye.

    What do you think the funny thingie labelled 0.8Amp is there for?
     
  7. ramonneke76

    ramonneke76 Member

    Messages:
    198
    Joined:
    Dec 31, 2012
    Oh yeah do I feel stupid.
    Thought it was the pilot light or something.
    Fuse is blown
     
  8. Trout

    Trout Member

    Messages:
    7,576
    Joined:
    Jun 23, 2006
    Location:
    Illinois/Far West Burbia
    Is there actually a fuse under that green lens? Weirdness for sure.

    That said, we have an old German sewing machine that actually uses the pilot lamp as the fuse. I kid you not.

    The bulbs are very hard to locate but without it the machine will not run.
     
  9. ramonneke76

    ramonneke76 Member

    Messages:
    198
    Joined:
    Dec 31, 2012
    No, the fuse was in right next to the pilot light where you set the voltage. Those germans camouflaged it really well. :)
     
  10. amphog

    amphog Silver Supporting Member

    Messages:
    3,627
    Joined:
    Nov 28, 2009
    Location:
    NY
    They even labeled it!
     
    Last edited: Feb 18, 2015
  11. schmidlin

    schmidlin Member

    Messages:
    5,267
    Joined:
    Dec 23, 2008
    Location:
    Sunny Ohio
    Thanks for the chuckle. That said, *very* interesting amp!
     
  12. ramonneke76

    ramonneke76 Member

    Messages:
    198
    Joined:
    Dec 31, 2012

    Thanks! It is a very interesting amp. Put it a new fuse and it is working again. There is no schematic on the web. The amp sounds very distorted, very microphonic. Amp reacts on my guitar when I use the pu switch or volume knob. It crackles when I use them.
     
  13. Diablo1

    Diablo1 Member

    Messages:
    622
    Joined:
    Nov 22, 2013
    Well, now that you have a brand new fuse in the amp, all you have to do is replace the other 100 old parts with new ones to make a good sounding amp......:D
     

Share This Page