[Amps] Source for good 572B's tubes?

["James McKellips" <w4nft@mckellips.net>]

Hello listers,

I am looking for a good source of 572B tubes. I have been buying them off eBay 
and these are Chinese tube. They haven't last more than a year. Any have any 
ideas, I would appreciate it. Please send email to w4nft@mckellips.net

Thank you and 73,

Jim, W4NFT
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