A consequence of RoHS compliance. The problem has already been documented
with N8LP's LP-100 display board (PLED version). Display segments begin
failing, one-by-one until the display becomes very difficult to read. Not
sure if there's been any recent developments concerning chemical or process
improvements to lessen the severity of the "whiskering."
I have spools of Kester clean solder, and a spool with 2% silver -- neither
of them flow very well. I'm inclined to stay with Kester 44 60/40 solder
from this point forward.
Paul, W9AC
----- Original Message -----
From: "Bob Spooner" <rl...@psu.edu>
To: "'Ron'" <wd8...@yahoo.com>; <drakelist@zerobeat.net>
Sent: Tuesday, November 01, 2011 8:47 AM
Subject: Re: [Drakelist] OT a failure mode of solid state electronics
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: drakelist-boun...@zerobeat.net
[mailto:drakelist-boun...@zerobeat.net]
On Behalf Of Ron
Sent: Monday, October 31, 2011 6:46 PM
To: drakelist@zerobeat.net
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
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