The following link will take you to some of the Denco (and other
manufacturer's) data sheets about the old coil formers and dust-cores.


http://vintageradio.me.uk/info/dencocoils.htm

Hope this helps

Derek.

In message
,
writes
Hello,
in an old VFO project that I'd like to duplicate (seems easy and
stable enough for me), the inductors (2) are specified as a number of
turns on a 5mm former with
"purple core". Now I know what a 5mm former might be, but I surely
don't have any idea what a purple core is and how to recognize it on
my parts department :-)
Any info is appreciated, thanks in advance.

Francesco IZ8DWF

--
Derek R. Smith.