I wouldn't buy used power tubes, of any brand/vintage, unless I personally knew they were not abused(over or under biased). Either of those conditions can shorten a tube's life dramatically. Besides that; there is no warranty. I recently purchased a premium matched octet of NOS GE 6550A's. One tube began to increase it's own bias(10-20mA/min), and blew a HI-FI Tuning fuse(ouch), after the third week. The tube was returned, and replaced within three days. There's no guarantee that NOS tubes will last longer, SO- it's nice to have coverage.
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- 29 posts total
- 29 posts total