Hi Back in the 60's and early 70's it was fairly common to wave solder a board and then saw off the "extra" leads hanging through the pc board. The result was that the core of the lead is exposed to the air. Just about all the leads on components of the era have enough iron in them to rust.
As a controlled experiment a couple hundred brand new GE Master Pro's were put under water for a week back in 1971. My boss at the time decided that he'd put them back to work. Boy did we learn a lot about hollowed out leads .... Bob On Jan 8, 2010, at 9:27 PM, paul swed wrote: > Hello to the group. > For whatever reason I have resurrected a 1967 HP 5245L counter. Indeed I > have many newer units. > But there is something about that nixie tube glow. > > Anyhow as good as HP is, I found interesting failures. Infact simply the > gold leads on the transistor rusted/rotted off. > That was most of the issues. Aside from the fact someone really hacked this > beast to death. > > Its looking pretty good at this point, though I do have several nixies that > are troubled. > Regards > _______________________________________________ > 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. > _______________________________________________ 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.
