These are big tubes, are they like power tubes where 3000 hours is a reasonable assumption?
Average Predictied GZ37 Lifetime?
LeGrace- Posts : 284
Join date : 2016-08-07
Location : Ontario, Canada
sKiZo- Posts : 1533
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 : 96
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 : 1533
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.
Drummerboy2- Posts : 5
Join date : 2019-04-28
sKiZo wrote: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.
My Mullard GZ37 is still going strong, about a year of playing hours on it now after not using the VTA-120 for a while. I checked the bias the other day and the bias is still at .50Vdc just like I set it back when I first installed the GZ37. I wanted to say Thank You again SkiZo for that recommendation.
10-E-C- Posts : 240
Join date : 2014-02-12
Age : 65
Location : upper east tn
Drummerboy2 wrote:sKiZo wrote: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.
My Mullard GZ37 is still going strong, about a year of playing hours on it now after not using the VTA-120 for a while. I checked the bias the other day and the bias is still at .50Vdc just like I set it back when I first installed the GZ37. I wanted to say Thank You again SkiZo for that recommendation.
My GZ37s have been in my M125s for 4 years and they are played a lot. you get what you pay for.
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