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<DIV>As Glen has already said, you can pick the core out in pieces - I use a
very sharp scriber to break pieces off but it requires a lot of patience. If the
cores are ferrite they are nearly impossible to drill out but if they are dust
iron that is much softer and easier to remove.</DIV>
<DIV> </DIV>
<DIV>I have had some success moving broken cores with a metal Allen key of the
correct size - it needs to be a very snug fit. Once you have all of the broken
pieces removed clean the inside of the former to remove any debris.</DIV>
<DIV> </DIV>
<DIV>Most cores will break if you apply force to them that is not evenly applied
across the entire contact surface. A poor fit trimming tool or one that is too
small will almost always cause core breakage. Some of the original Heathkit
trimming tools in my collection appear to have shrunk slightly over the ages and
are now a sloppy fit in the cores. These should not be used.</DIV>
<DIV> </DIV>
<DIV>I have also tried using silicon tap grease when placing a good core back
into the former with some success. I never use miniature rubber bands as they
can jam in the threads.</DIV>
<DIV> </DIV>
<DIV><FONT lang=0 size=2 face=Arial FAMILY="SANSSERIF"
PTSIZE="10">73<BR></FONT><FONT lang=0 color=#0000ff size=4 face=Arial
FAMILY="SANSSERIF" PTSIZE="14"><I><BR>Bob</FONT><FONT lang=0 color=#000000
size=2 face=Arial FAMILY="SANSSERIF" PTSIZE="10"></I><BR>Bob F Burns<BR>C Eng,
FIET, MSE<BR>Amateur Radio Callsign: G3OOU<BR>Registered RSGB
Instructor<BR>G-QRP Member No: 6907; Zone: 14, QRA: IO91WH; WAB:
TQ25<BR>Secretary of Crystal Palace Radio & Electronics Club: <A
href="http://www.g3oou.co.uk/">www.g3oou.co.uk</A><BR>Technical web site: <A
href="http://www.qsl.net/g3oou">www.qsl.net/g3oou</A><BR>Follow G3OOU as
@BobFBurns on Twitter </FONT><FONT lang=0 color=#0000ff size=2
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