I've run into this problem before. I use penetrating oil. Kroil is my choice. I let the oil run into the joined surfaces and let it sit overnight. I use an old towel for grip and carefully rotate the reproducer. It took me several time to do this. It is a slow tedious procedure, but can be done.
Harvey Kravitz
I just did what you're asking about this weekend on the same tonearm. What I did was to remove the needle arm, mica diaphragh and all gaskets. Then when you look down the hole in the reproducer body (behind where the diaphragm sits) you'll see a small gap where the reproducer body and the tonearm meet. Using the pipe nozzle that comes with the can of penetrant (I used PB Blaster) aim some in that gap. Then also spray some around the backside of the reproducer where the tonearm contacts the back of the reproducer body. Wait a few minutes for the penetrant to work, then firmly grasp the tonearm in one hand and the reproducer body in the other and try to get the reproducer body to rotate. Try to pull the reproducer body off the tonearm as you rotate. Don't go nuts with force. If it only moves a small bit that's fine. Even a small amount of movement will make a visible gap between the reproducer body and the tonearm. Squirt some more penetrant in the gap, give it a minute, and resume your twisting and pulling and the reproducer body will pop right off. Don't use anything other than your hands and a towel for this....meaning no Channel-Locks or pipe wrenches....or you could destroy the pot parts. Try to be careful when you shoot the penetrant behind where the diaphragm sits in the reproducer body because if you get penetrant on the machined surface directly behind the diaphragm (the surface with the black music note and the "Columbia" logo) you'll remove the black paint in those logos.
Once mine was off I cleaned all the penetrant off and then put a dab of grease around the track the detent pin rides in on the back of the reproducer body. If it's a real tight fit you'll need to hit the back of the reproducer body (that slips in the tonearm) with some very fine sandpaper (800-1000 grit) to knock down the swelling. Once you got it all cleaned up reinstall the gaskets, diaphragm, and needle arm and you're good to go!!!!! Any questions just shout!!
Thank You Guys I Figerured it was better to ask Thank You
I have another question but will post another with pictuers @ a later time
It is my columbia grafonola it needs a motor and i want to restore this but i will also be needing a platter for the records,
Once again Guys Thanks so much for the repoducer help
Sincerely william
Hello Check out My you tube channel of Recently restored Phonographs and enjoy
Thanks
Thank You Guys Happy Days are here I have did what i was looking for Although broke 1 ring cause I do not have the money to buy the proper tool I did seprate 3 repoducers from the arm i have 2 good ones 1 for parts
again Thank You God Bless You All Happy Holidays
Just for future reference, you can build a tool to remove the ring very easily by hammering 2 loud tone needles into a piece of wood in the same distance like the holes in the ring are. This way you can easily turn the ring to screw it off.
Andreas