02-11-2014, 10:28 PM
Philco put capacitors in those blocks, and filled them with tar. It gave them mounting points for other wires and made the chassis cleaner. I have no idea why they had to use tar...
Those two caps filter out noise in the AC line, and give you a cleaner power supply. Each goes to one leg of the line and ground. They should technically be safety caps, but regular ones are usually fine. http://www.justradios.com/safetytips.html
To remove the tar 'plug', cut the four little wires in the rivet holes on the top of the block (I use a razor blade), then heat it with a heat gun on the top and sides. After 20 seconds, use a small screwdriver to push the contents out the bottom. It is a much better idea to mount them inside the old block, both for safety and aesthetics.
Over at the Philco Repair Bench there are articles about the contents and connections of various blocks, and how to restuff them.
Those two caps filter out noise in the AC line, and give you a cleaner power supply. Each goes to one leg of the line and ground. They should technically be safety caps, but regular ones are usually fine. http://www.justradios.com/safetytips.html
To remove the tar 'plug', cut the four little wires in the rivet holes on the top of the block (I use a razor blade), then heat it with a heat gun on the top and sides. After 20 seconds, use a small screwdriver to push the contents out the bottom. It is a much better idea to mount them inside the old block, both for safety and aesthetics.
Over at the Philco Repair Bench there are articles about the contents and connections of various blocks, and how to restuff them.
