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JOLIDA Issue

So I plugged in my JOLIDA 302BRC yesterday and already It has an issue.
After singing sweetly for two minutes, one of the EL34 tubes imitated the sun and poof, the amp shut down.

Is it possible that one of the bias pots got out of whack during shipment?

Also, according to the manual, there is a stop point for the pots when turned in a counter clock fashion yet I was able to turn two pots several revolutions without reaching the stop point.

Thoughts?

RIGGED
rigged
stereo5's avatar
stereo5
6,250 posts
 
If it is a new unit, call Mike at Jolida. They will promptly replace it with a new one. I had a similar problem with their CD player a few years ago. It worked for a day then started skipping on every disc. Mike sent me a new one via FedEx next day and I sent the other one back the next day at no charge to me. First class outfit.
response34's avatar
response34
169 posts
 
Very possible you could have had a bad tube from the start. Call your dealer (or Jolida if bought used) and let them know what's going on.
Whenever dealing with tube products, the tubes are always first suspect when there is a problem.
schubert
7,386 posts
 
Russian tubes are junk, Chinese not much better.
Anybody who thinks they sound good must of never heard an amp with good America, British, German, Hungarian or French tubes.
rigged OP
2 posts
 
I sure hope it is just a bad tube and not something with the "guts" of the amp. I purchased it from EBay, the outer shell is in mint condition and the seller did a heck of a job with the packing, it was well taken care of.

Thanks for the replies, I'll report back when I install the replacement tube.

RIGGED
josefm
53 posts
 
"I was able to turn two pots several revolutions without reaching the stop point."
Normal for multiturn bias trim pot, which the newer Jolida units has. Bias should have been checked after shipping before power up.
The multiturn pots make for more precise setting unlike the older single turn ones.

When replacing the tube make sure and turn the pot down several revolutions, it's a 12 or 13-multiturn pot.
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