These are big tubes, are they like power tubes where 3000 hours is a reasonable assumption?
Average Predictied GZ37 Lifetime?
LeGrace- Posts : 268
Join date : 2016-08-07
Location : Ontario, Canada
- Post n°1
Average Predictied GZ37 Lifetime?
sKiZo- Posts : 1521
Join date : 2013-04-01
Location : Michigan USA
I don't count hours here, but I can say I got several years of hard rockin' on the current one. That's also driving a quad of KT120's most of that time. Also picked up on a spare while I had the chance before the price bloomed a bit back.


bbqjoe- Posts : 99
Join date : 2018-12-03
sKiZo wrote:I don't count hours here, but I can say I got several years of hard rockin' on the current one. That's also driving a quad of KT120's most of that time. Also picked up on a spare while I had the chance before the price bloomed a bit back.
I'm still highly impressed with your work on this amplifier!
sKiZo- Posts : 1521
Join date : 2013-04-01
Location : Michigan USA
More importantly ... so am I !! ;-}
I've also got a Mullard GZ34 here that racked up quite a few miles before I scored the GZ37. At the same time, I ended up smoking a couple Chinese tubes fairly quickly. Lot depends on how well built (or overbuilt?) the tube is.
I've also got a Mullard GZ34 here that racked up quite a few miles before I scored the GZ37. At the same time, I ended up smoking a couple Chinese tubes fairly quickly. Lot depends on how well built (or overbuilt?) the tube is.
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