The bobbins for the open cover pickups is made from phenolic PC board material. The rivet pole pieces hold the top and bottom together. They paint it black after that.
Our very own RedHouse (Brad) has a great pictorial on building one of these:
Cloning a Rickenbacker 4001 Neck Pickup
The toasters were different in that they had 6 long alnico rod magnets. The newer toasters had shorter magnets. I don't know what they look like now. The open top pickups had the steel poles and a ceramic magnet on the bottom.
You can get the covers/ring here:
+The Rickenbacker Page Parts
Our very own RedHouse (Brad) has a great pictorial on building one of these:
Cloning a Rickenbacker 4001 Neck Pickup
The toasters were different in that they had 6 long alnico rod magnets. The newer toasters had shorter magnets. I don't know what they look like now. The open top pickups had the steel poles and a ceramic magnet on the bottom.
You can get the covers/ring here:
+The Rickenbacker Page Parts
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