VH4 Problems... Help!

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madhouse

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I was in the studio today with my VH4 to record my band's demo. The power in that studio is well controlled.

After letting the amp warm up for a while, I placed it in run mode and it played fine for a few minutes. I then placed it on mute for a few minutes. After a few minutes more, the amp began to make an intermittent buzzing sound, which I passed off a some type of electomagnetic interference and I flipped the amp back into standby, and the sound stopped.

A few minutes later, it was time to play again and I took it off mute, flipped the amp from standby to run, and the amp shut down immediately. The main fuse had blown. I replaced it with the spare, and the amp turned on, but blue flashes began coming from inside the amp, and horrendous noise is now audible on all channels. Afraid of causing damamge, I shut down the amp. The sound is similar to a clip that another user previously posted when they were having problems (I can't find that post now). Anyway, I'm afraid the something serious has gone wrong and the amp is unusable.

My VH4 is not even two months old, and I'm really disappointed. I live in Maryland, far the the California distributor, and I know nothing about servicing amps, so I don't want to open it up.

What should I do? Take it back to the store? Ship it to California? Is there something simple I should try? Guidance and/or sugggestions would be much appreciated. Thanks in advance.
 
Sounds like power tubes, Do not freak out yet. E-mail or PM - Peter -I do not think he like to give that kind of advise on the forum. Sucks it happend there. Tubes are kind of like light bulbs -they can give out any time. The maker of lamp cannot control that.
 
That´s the reason why we are searching for an other power tube.
Please stay cool and call Uwe at 714 5381285

Sorry,

Peter
 
Thanks for the quick reply. Will call Uwe, and I'll post back when things get straightened out.
 
Just an update...

Well, you guys were right.. turned out to be a power tube issue. One of the EL34B-STRs lost vacuum and shorted out. After I took the tube out and was examining it, the glass actually totally separated from the base... clearly a tube defect. Unfortunately, the way it failed didn't trip the tube fuse (at least not right away) and it looks like some damage may have been done because there's some residual noise after replacing the tubes. The amp's off to Uwe, who has been extremely helpful, to complete the repairs.
 
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