2. amps-preamps
  3. 161737-5705

Tube Fire What Next?

I have a melody el34 integrated amp. I truthfully don’t know much about how to maintain it. About a year ago I had a well respected tech do some work on it and put in new tubes. Last night the family was listening to music and it looked like there was fire inside of one of the power tubes. Scared the crap out of my daughter. I turned off the power and unplugged it.  I assume I need to replace the tube. Is there anything else I should do? I have never biased the amp myself but I did just buy a multimeter which ironically just came this week. Can someone walk me through this so I don’t bust my amp or more tubes. Thanks for the help. 
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Showing 1 response by oldhvymec

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oldhvymec
5,101 posts
 
Pull the old, check the pins, tighten if needed, install the new, (give them a good visual).

It's never a bad idea to back the bias off a bit (Counter Clock Wise), FIRST. Then TURN the machine ON, and warm it up, 10-15 min.

LOOK!! Make sure your new valve are not red plating for the first 10 minute or so.. pay attention.. Now do what millercarbon said. Set your DMM (digital multi meter) or an analog.. I don't use analog meters,  EVER.. Set to mA.

Turn the volume DOWN all the way.. ok. They say it doesn't matter, it may.. or may not. To be on the safe side.. Turn the volume down...

Be sounding like heaven in no time..

Recheck in 24 hours.. Keep it tuned up..

Regards
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