Bruce wrote:
I have a bunch of LM329's purchased from a large distributor.I guess I should make some noise measurements.Some have even been installed in low noise regulators.
I'd think if you used LM329s as bad as the ones Gerhard tested in sensitive circuits, it would have been obvious on testing.
The probability that you receive genuine parts is much higher if you buy from a major distributor (for many parts, including almost all hard-to-find semiconductors, if you buy on ebay the probability approaches zero very closely). But big distributors are not immune from the problem.
I sometimes buy ten-turn WW potentiometers from China that purport to be Bourns 3590S parts but are, in fact, counterfeit, right down to the molded-in "Made in Mexico" legend. I have to throw away about 25% of them, but even so I get ten for the price of one genuine, made-in-Mexico Bourns and the selected ones are good enough for many applications. I will not use counterfeit semiconductors, because invariably the very specs that you want the part for are the ones it doesn't meet (which means that after many attempts I no longer buy semiconductors on ebay, EVER, from ANYBODY).
Best regards, Charles _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
