charliewphelps@gmail.com wrote:
I had this exact problem with some PS Vane EL34's. Rachel at Grant Audio explained that there was a problem with the screen grid in the early batches of the tube and that they had to make a change in the design to fix it. The screen grid takes to much current and will melt down. Don't use them- they may take out your transformer. She gave me a new set, no questions asked. Doubt you can get that to happen with Ebay but good luck.
It's a shame that the tube has problems, I think they have a lovely sound but I never let them run when I'm not around.
Charlie
Hey Charlie,
After a lot of looking I found Grant Audio.
I have removed the offending tubes, but the performance from the short live audition I had, was that this particular model of tube was a fantastic upgrade to my system.
Do you think I just got a bad lot
I would like to purchase a quad from Grant and take another try. They claim there tubes are after-manufacturer tested, and to some degree warranteed.
Or, should I just look somewhere else for my next upgrade?
Thanks,
Chris