[Amps] 572b

[L L bahr]

If quality control is so poor, how do you test for longevity or robustness?  Just checking the emission when new may have nothing to do with longevity.  I'd like to know how well a Chinese 572B will hold up compared to a Cetron 572B.  I wonder what short cuts the manufacturer has taken in production when many new ones go out the door with poor emission. What else is wrong with them?   Maybe it's time for these amplifiers to be retrofitted with other type tubes.

Lee, w0vt

----- Original Message -----
There's no doubt that the manufacturer is the problem, but since they are the only one making them  and most Ham's just need a few, a reputable distributer is very important in the supply chain.  He tests them before selling them to be confident that they worked when they left his facility, that is one of the reasons he is considered reputable.  It costs more, but he must becompensated for his time.  A reputable dealer is paramount in buying a tube you know has a decent chance of being good, andis the one thing you can do anything about-choose who you buy from !! Cheers,  Matt  73AD7XN   		 	   		  
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