The tin whisker growing inside the transistor case that NASA discusses in the article is 45 yrs old. It is not just the solder or the new components that have potential to be affected.
http://nepp.nasa.gov/whisker/index.html --- On Tue, 11/1/11, Bob Spooner <[email protected]> wrote: > From: Bob Spooner <[email protected]> > Subject: RE: [Drakelist] OT a failure mode of solid state electronics > To: "'Ron'" <[email protected]>, [email protected] > Date: Tuesday, November 1, 2011, 8:47 AM > Ron, > > Vintage radios were made with regular leaded solder so they > don't have that > problem (unless you repair them with lead free solder.) > It's the new rigs > that I'm concerned about. Tin whisker growth under surface > mount components > would be very difficult to detect and remove. So keep your > vintage Drake > radios operational and you won't be without a rig if the > new one fails. > > 73, > Bob AD3K > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] > On Behalf Of Ron > Sent: Monday, October 31, 2011 6:46 PM > To: [email protected] > Subject: [Drakelist] OT a failure mode of solid state > electronics > > All, > I was tooling around the web and ran into this video and > document. For > those unfamiliar, the new lead free solder often has a > higher tin content > and can causes tin whisker growth > issues. Who knows when it might strike > your beloved solid state or hybrid vintage radio. > Maybe we should all > return to hollow state :-) > > http://www.vintage-radio.info/whiskers/ > > Totally amazing IMO. > > 73, > Ron WD8SBB > > _______________________________________________ > Drakelist mailing list > [email protected] > http://mailman.zerobeat.net/mailman/listinfo/drakelist > > > _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
