"N_Cook" wrote in message
news
Third time in as many months, usual PbF phantom problems, solder looks
fine but no wetting between eyelet and pin and grey (tinpest?) pin, even
after desoldring. Other repairers regularly finding this failure mechanism
also?
This time 2009 Revera Fandango valve amp . Needless to say problem is with
one of the combined pot and pull-switch , awkward to desolder.
So what is the function of eyelets other than to bridge gaps in pcb holes,
for resourced components with smaller pins than original source , and so
incompatible with pcb drillings otherwise , for stuctural solder
integrity.
Perhaps with proper solder they made more robust joints but for RoHS times
?


Eyelets are a PITA whatever solder you use.

A couple of monitor manufacturers used them for the flyback transformer pins
to prevent dodgy soldering resulting in a fierce arc that burns a hole in
the board.

Solder wetting round the edges of the eyelets was often worse than the dodgy
soldering, and tended to cause the very problem it was supposed to prevent.