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    Average Predictied GZ37 Lifetime?

    LeGrace
    LeGrace

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    Post by LeGrace on Sun Feb 10, 2019 3:47 pm

    These are big tubes, are they like power tubes where 3000 hours is a reasonable assumption?
    sKiZo
    sKiZo

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    Location : Michigan USA

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    Post by sKiZo on Sun Feb 10, 2019 5:24 pm

    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.

    Average Predictied GZ37 Lifetime? Tube-set-APR18
    bbqjoe
    bbqjoe

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    Post by bbqjoe on Sun Feb 10, 2019 10:46 pm

    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.

    Average Predictied GZ37 Lifetime? Tube-set-APR18

    I'm still highly impressed with your work on this amplifier!
    sKiZo
    sKiZo

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    Post by sKiZo on Mon Feb 11, 2019 6:56 pm

    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.
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    Drummerboy2

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    Join date : 2019-04-28

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    Post by Drummerboy2 on Sun Apr 28, 2019 3:44 pm

    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
    10-E-C

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    Post by 10-E-C on Wed May 01, 2019 8:01 pm

    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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