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Bat 150 SE replacing 6C33-B power tubes problems

BAT 150 SE 6C33-B power tubes were replaced with 8 pcs new tubes. 3 of the new tubes blew out the 3 amp fast blow fuses and internal sparks were seen with loud nasty sounds emmitted from mid range and tweeter sections. These amps only feed only the non-bass sections.
The defective tubes are now replaced with good ones. Upscale Audio did not hesitate to send me replacements. Since they are out of stock on current production Upscale sent me NOS without any extra charges.
Is it normal because the 8 NOS tubes are new that the sound is now harsh, metallic and not sweet as it used to be.
Does anyone have any idea how many music hours app. this can take ?
Any advice on this matter is really helpfull to me.
Thank you.
terryakhan

Showing 2 responses by trcnetmsncom

trcnetmsncom
431 posts
 
Hello Terry,

Sorry to hear about your problem. Yes the 6c33 tube can be a pain in the neck sometimes but BAT has done a good job of seeing to it that the amp is well protected.

From what I've heard there is a HUGE supply of these tubes so there is no need to worry about a shortage for a very long time. I'm sure the amps will be sounding as good as ever in no time.

Best of luck,
Tom
trcnetmsncom
431 posts
 
Hi Terry,

I'm glad to hear all is well with your BAT 150se monoblock amps. I did however want to give you a word of caution about applying the Walker SST or similar type of products on the tube pins. There have been many reported problems of this causing tubes to fail and taking the amp with them in the process. I have NOT heard of this being a problem with BAT tube amps but I do feel a phone call to BAT to inquire about this would be reasonable.

All the best,
Tom
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