26-01-2018, 07:58 AM
I tried various methods, cutting the can in the middle ruins the print, filing the swage off one end looks a mess afterwards.
I tried cooking them till they blew but they go with a massive bang and swell up.
Now I cut the lead off flush at one end and drill down to almost the other end with a drill just smaller than the end of the can swaging.
This removes most of the old capacitor guts and leaves enough space for a new poly capacitor.
Cut the other old lead off and a 1mm drill through the remaining end cap for the new lead, insert new capacitor and fill open end with matching colour silicone sealant smoothed to look like an end cap.
I've not found it necessary to ground the can though some makers did.
Most of the ones I have tested pass well enough for a valve set provided that they are not in a critical position.
I tried cooking them till they blew but they go with a massive bang and swell up.
Now I cut the lead off flush at one end and drill down to almost the other end with a drill just smaller than the end of the can swaging.
This removes most of the old capacitor guts and leaves enough space for a new poly capacitor.
Cut the other old lead off and a 1mm drill through the remaining end cap for the new lead, insert new capacitor and fill open end with matching colour silicone sealant smoothed to look like an end cap.
I've not found it necessary to ground the can though some makers did.
Most of the ones I have tested pass well enough for a valve set provided that they are not in a critical position.
Boater Sam.
