Hi ............. I will add my 2 cents worth and 25 years of field time. The wound core and the ferrite base are attached with silicon sealant. I have seen cases where a little of the sealant made it to the matting surfaces of the cap and base, a bad thing. You likely will have to remove the nut and tensioning spring then very carefully pry the cap from the base. Clean up the mess and reassemble. Look very closely to the edges it only takes a drop of the stuff to weld the cap to the base. Good luck Bill ! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Find new MIDI music and Guides to Rodgers Organs at www.frogmusic.com To post send messages to: rodgersorgan@xxxxxxxxxxxxx To unsubscribe or change mail delivery (digest, vacation) go to www.frogmusic.com/rodgersmem.html