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Fireworks in an Audio Research VT200

I turned on my amp the other day and as it was cycling through the start up process, I heard a large pop and then an enormous fireball flew out of the top of it. I immediately unplugged the amp. After taking all the tubes out and visually inspecting everything, I concluded that no tubes were blown. I put it all back together and it sounds great and I have had no problems since. The bias is fine.

Has anybody had experience with this sort of thing?
jmcdermott

Showing 1 response by jdspratt

jdspratt
4 posts
 
My VT200mk2 stopped John Denver during an immense crescendo with a tube arc & an impressive white flash of blown resistor underneath -yes that smell is quite pungent - AR do fireproof their resistors. The 6550s were about 1200 hrs in but I replaced the lot. Leonard at AR is very helpful.
Maybe I should keep a fire extinguisher at hand given the above tales! Doa nt of you have experience with tube rolling in VT200mk2?
Doctor from durham, england
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