Original VS Reproduction model C diaphragms

[JerryVan]

I cut my own gaskets out of .015 silicone rubber sheet. Works good for me.

[Victrolaboy]

I cut my own gaskets out of .015 silicone rubber sheet. Works good for me.

Where do you buy your sheets of silicone?

[JerryVan]

http://www.mcmaster.com/#silicone-sheets/=w61b4w

I get the 35A hardness. I see the price has gone up but, a 12 x 12 sheet gets you a lot of gaskets.

[JerryVan]

That link didn't work the way I wanted it to. Here is the page...

[JerryVan]

I cut out the gaskets with a hole punch made to cut the inside & outside diameters. This would be very hard to cut with just a scissor. Some kind of guide and an Exacto knife might work too.

[Edisone]

Some new diaphragms are too thick and stiff.

I don't think the gaskets need to be soft, as long as they're airtight; the flex is all in the diaphragm's area, not its edge. This is the same in the Orthophonic type reproducers - the diaphragm is meant to be held tight at its edge.

[Victrolaboy]

Some new diaphragms are too thick and stiff.

I don't think the gaskets need to be soft, as long as they're airtight; the flex is all in the diaphragm's area, not its edge. This is the same in the Orthophonic type reproducers - the diaphragm is meant to be held tight at its edge.

Yeah good point. The original gaskets that were used for the orthophonic were wax paper and the reproducers sound excellent. But this afternoon I've been experimenting with the model C reproducer a little and when I replaced the new neoprene gaskets with gaskets I cut from foam material (available at the craft store) it sounds sooo much better! I noticed that the new diaphragm is quite stiff and doesn't flex as much as it should so these soft squishy gaskets do the trick.

[Edisone]

That makes sense - if the new diaphragms are too stiff, softer gaskets are bound to help !

[Lucius1958]

I cut out the gaskets with a hole punch made to cut the inside & outside diameters. This would be very hard to cut with just a scissor. Some kind of guide and an Exacto knife might work too.

Does the punch cut them both simultaneously? Where can one find one?

Bill

[Victrolaboy]

I cut out the gaskets with a hole punch made to cut the inside & outside diameters. This would be very hard to cut with just a scissor. Some kind of guide and an Exacto knife might work too.

Does the punch cut them both simultaneously? Where can one find one?

Bill

Jerry machines his own punches with a lathe.