I have never quite understood how vdH manages to get his Colibri MC cartridge to work, without a front pole piece to complete the magnetic circuit.

AJ v d Hul explains here - but I'm still not sure if my brain can grasp it

Output of course, is low.

positive-feedback.com/interviews/a-j-van-den-hul-interview/

DarkLantern blog - darklanternforowen.wordpress.com

vdH Colibri close-up:

DarkLantern blog - darklanternforowen.wordpress.com

black magic