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Prefered 300B tubes for Canary Amplifiers

I'm the owner of a Canary 306 300B amplifier. The stock tubes are EH and I'm interested in upgrading to a premium set of 300B tubes. I'm wondering what others have tried and liked and wondered whether the Canarys can accept the XLS designated tubes.
frontier1
gsm18439
895 posts
 
Not sure how many watts are dissipated. I will try to find out. When I once asked Jarek (the amp designer) and Keiko (from Amtrans in Japan) the question of 300b longevity, they were non-commital. However, 40,000 hours!?! At this rate, my first pair is barely broken-in; my second pair will outlive me; and my plans to buy a third pair when I am in Japan in July are "stupid money" silly. LOL.
onemug
784 posts
 
I think the WE spec was "up to" 40K. Like Charles mentioned, it depends on how hard they are ran (voltage and current).

I have 2 300b SET's, that run the tubes in the low 20's watt/dis. I have a PP 300b that actually runs about the same maybe a little less.
charles1dad's avatar
charles1dad
10,250 posts
 
Gary,
I know, 40K hours is hard to grasp.As Brf pointed out however this tube was designed for very long and trouble free use fot telephone line service. This was meant to be from the outset an ultra low maintenance service tube. What is critical is how meticulously the various current 300b tubes are made.Suppositly this is a design objective by the Japanese engineers assigned to the Takatsuki project.The tubes are too recently developed to know yet their longevity. I can only attest to superior sound at this stage.
Regards,
charles1dad's avatar
charles1dad
10,250 posts
 
Onemug,
What you wrote makes intuitive sense, push pull use shouldn't be any more stressful as the duties of the output tubes are shared.We need a amp builder to comment.
Regards,
orpheus10
8,668 posts
 
Charles1dad, what kind of speakers do you have for the 300B amp?
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