Ideas or concerns about upgrading a pair of 9849A's

[bowtie427ss]

Remove the screws. Cap comes off. Fram is underneath.
Be careful.
Ron

sounds as if maybe the cap is stuck to the diaphragm mounting hub. most originally had a neoprene or similar material gasket between the hub and cap, these sometimes get a bit sticky. I would emphasize the "be careful" part.

[Altec Best]

I would emphasize the "be careful" part.

+2 Try and use a brass or stainless or aluminum screw driver as well, once you get near those screws the magnetic field will suck a steel driver right into the Diaphragm.If you must use a steel one use your finger to wrap around the tip of the driver to prevent an accident.

[bowtie427ss]

+2 Try and use a brass or stainless or aluminum screw driver as well, once you get near those screws the magnetic field will suck a steel driver right into the Diaphragm.If you must use a steel one use your finger to wrap around the tip of the driver to prevent an accident.

AB, if i understand him correctly, i think he has the diaphragm and cap separated from the motor already. So, there'd be no nearby field to contend with, if i'm understanding correctly.

By the same token, that would mean that the very delicate coil and former are exposed. I don't think we can over emphasize the careful part here for those who are new to hands on experience with these parts. Ham hands beware!

[Altec Best]

AB, if i understand him correctly, i think he has the diaphragm and cap separated from the motor already. So, there'd be no nearby field to contend with, if i'm understanding correctly.

By the same token, that would mean that the very delicate coil and former are exposed. I don't think we can over emphasize the careful part here for those who are new to hands on experience with these parts. Ham hands beware!

Thanks Tom for the heads up! I assumed he was talking about taking the driver apart. Without going back to read the whole thread.

Bad habit on my part ! Try to zip through too quickly....