[chgolatin2]

I just received my fresh batch of new tubes from Cryoset (KT77) for my Jolida 1000RC.  I replaced all of my older tubes even though they are still in good excellent working condition, anyway, all the tubes were replaced, the system was re biased, etc when I went to turn on the system tube number 8 sounded like loud POP.  This was strange since I have never experience a weird noise like that.  I turned off the system immediately re check the tube and re-started the amp.  Everything seems to be working fine now but now I am concern about this tube that sounded like a lOUD POP, wondering if the tube came in slightly damaged or something else went wrong.

Any ideas?   

[bunky]

I just received my fresh batch of new tubes from Cryoset (KT77) for my Jolida 1000RC.  I replaced all of my older tubes even though they are still in good excellent working condition, anyway, all the tubes were replaced, the system was re biased, etc when I went to turn on the system tube number 8 sounded like loud POP.  This was strange since I have never experience a weird noise like that.  I turned off the system immediately re check the tube and re-started the amp.  Everything seems to be working fine now but now I am concern about this tube that sounded like a lOUD POP, wondering if the tube came in slightly damaged or something else went wrong.

Any ideas?   

I have read that some of the JJ Tesla KT 77's were made with undersized pins.i imagine that undersized pins might compromise the grip that the sockets have with the pins. if you have micrometers and a tube spec sheet you could find the ideal diameter for the pins on the spec sheet and check them yourself.if they are way out of tolerance i would request replacements from whomever sold them to you.thanks....WCW III

[chgolatin2]

I contacted cryoset lets see what happens...  Thanks!