Interestingly it was not your normal tin whisker (I have seen a few of
those, just..) it was a substantial one that had grown out from the
stack of 2 Ceramic caps in series with the coil to the RF choke in
series with the DC supply to the lamp housing.
It might even have been a solder blob left over from production but it
looked quite crystalline.
It's a bit ugly in the lamp assy because the heat and strong RF field
made a bit of a mess of insulation on the RFC and the heater leads but
everything else seems ok
I'll try and locate an MRF134 and see how I get on, certainly worth the
price and time by the sounds of it.
thanks for all the help and encouragement
On 16/02/2011 22:14, Pete Lancashire wrote:
http://nepp.nasa.gov/whisker/
I've fixed two cell phones for friends and I have a very nice MP3
player I got for $1.
Each was fixed with a stiff brush with a combination of compressed air
(outside) and
a vac inside.
-pete
PS if you do the air thing don't forget about static use a ionizer.
On Wed, Feb 16, 2011 at 1:58 PM, Bob Camp<[email protected]> wrote:
Hi
Real solder has lead in it to eliminate tin whiskers.
We're going to see a lot of stuff die in the coming years from these little
critters.
Bob
-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Magnus Danielson
Sent: Wednesday, February 16, 2011 4:55 PM
To: [email protected]
Subject: Re: [time-nuts] SRS PRS10 problem
On 02/16/2011 10:31 PM, paul swed wrote:
Well a couple answers.
If those are RB whiskers try the heat gun at 300 degrees on it for 15
minutes. As Magnus suggests and I just tried for the first time. It
actually
worked and I recovered the rb lamp.
While the heat gun on the Rb lamp is a nice trick, the whiskers most
likely is nothing but traditional tin whiskers. A bit of re-soldering to
remove bad metal and replacement of burned transistor is where I would
start.
Cheers,
Magnus
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--
73
Brendan EI6IZ
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