Hi !
I've just found an old stock of tubes (mainly ECC8x) an I'd like to test them in order to trash the bad ones.
Right now, I've got a small all tubes guitar amp which I use with my ears, looking for strange sounds or microphony but this method is not really precise, depending on my mood :wink:
I took a look at the tubemeters (eBay seems to be the best source for this kind of product) but most of them are old (so I don't have any warranty about their precision, kinda disturbing for a measure instrument) or highly priced.
How do you proceed to test your tubes?
As I mainly have ECC8x tubes to test, I think that a quite simple testbench could be realized but I don't know all the parameters I should test in order to say if a tube is dead or not.
Thanks for your answers.
I've just found an old stock of tubes (mainly ECC8x) an I'd like to test them in order to trash the bad ones.
Right now, I've got a small all tubes guitar amp which I use with my ears, looking for strange sounds or microphony but this method is not really precise, depending on my mood :wink:
I took a look at the tubemeters (eBay seems to be the best source for this kind of product) but most of them are old (so I don't have any warranty about their precision, kinda disturbing for a measure instrument) or highly priced.
How do you proceed to test your tubes?
As I mainly have ECC8x tubes to test, I think that a quite simple testbench could be realized but I don't know all the parameters I should test in order to say if a tube is dead or not.
Thanks for your answers.