2. amps-preamps
  3. 132537-2693

Genalex GL GZ-34 Rectifier...Did I just get a bad one? Five months seems

like a terribly short lifespan. I bought it in May and spent the extra money to get a "good" tube. It sounded good while it lived. But it went in a fiery inferno last weekend.  Fortunately it only took out a fuse.

It was running in a Bob Latino VTA ST-70 Dynaco amp. It's a great amp but runs the rectifier a bit hard from my understanding. However the original tube lasted at least 3-4 yrs IIRC. I tried a SS rectifier. YUK!! I put the tube (a spare Sovtek) back in place I've had good luck with the KT-66 Genalex GL's and they have a good reputation (I think). Is this just the luck of the draw. IOW, even a new tube can have a short life span? Or is this odd? Is there any way to avoid it? I'd buy another Gennalex GL if it will last. But I can buy 2 Sovteks for the price of one GL. Sovtek sounds good too.

FWIW, The tube that failed was cryo treated. Could that make a difference in a rectifier tube? As always, Thanks for your help.
artemus_5

Showing 1 response by grk

grk
240 posts
 

@mars2K

I have the same set up with no rectifier issues. However, I never used any Sovtek tubes, only a Sophia Electric 274B mesh plate and a NOS CV 717 rectifier that is the same as a 5R4GY tube. Since you have not had issues with your NOS Mazda, I would say that the Sovtek tubes are unable to handle the juice that the rectifier needs. I highly recommend Sophia Electric for new production tubes.

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