Tam/WB2TT wrote:

Let me see if I have this straight. You are filing on the round part of
the connector barrel where it has the 2, 3, or 4 holes for soldering to
the shield. You use a narrow flat file, and file just short of the
point where the holes would become oblong?

Pretty much... I hope this picture helps make more sense of it:
http://www.ifwtech.co.uk/g3sek/misc/pl259.jpg

I actually use a 5/32 round file or rasp. Stop filing when the hole is
just beginning to become larger, and has thin, sharp edges all round.
The thin edges and bare brass make soldering much easier.


--

73 from Ian GM3SEK 'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek