Tubes Asylum

SEPARO AMP hassles

198.54.202.226

My Separo p88i amp is 6mnths old. 4 x 6SN7 & 4 x KT88. Switched on to warm up, 10 mins later right rear KT88 lights up & fuse blows.
Opened up, all looks OK, replaced fuse.
Replaced Chinese KT88's with EH KT88, warmed up for 10 min and re-biased ( 600mV )played music for an hour. Switched off 2hrs later & switched on 5hrs later. 10mins into warmup right front EH KT88 lights up & scratchy sound from speaker - switched off in a hurry.WHAT DO I DO NOW ?
I don't have schematics -Please help !!

Follow Ups:

RE: SEPARO AMP hassles - Valve Bob 08:18:41 05/01/08 (0)
What next? Replace it. - Nemo non 07:35:03 04/29/08 (0)

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