Identify these diaphragms

[Mike F]

Seller claims 044, I think not. Chinese aftermarket?

[Robh3606]

Without a silver colored side facing out they are not originals I think the connectors are wrong as well. I think it should be male female

Rob

[Mike F]

Without a silver colored side facing out they are not originals I think the connectors are wrong as well. I think it should be male female

Rob

You`re right about the terminals. Is`nt the original a silver impregnated fabric dome and not what appears to be phenolic?

[Robh3606]

Is`nt the original a silver impregnated fabric dome and not what appears to be phenolic?

I am not sure I know the 034/066 was phenolic on the inside and aluminum coated on the side we see. Assumed the 044 was the same.

Rob

[grumpy]

yes, vapor-deposited aluminum on a phenolic substrate... (both 044 and 066)

Forum legend is that the vapor deposition machine broke down and silver paint
went on the tail end of 044 production. Less of a legend, as I've seen both, ...
could have been a replacement dome.

One can tell by looking (texture of the phenolic is easier to see with the aluminum coating)
and by measuring... the silver paint is not particularly conductive, while the aluminum is.

I have no idea what's in those pictures (specifically), nor what they were intended for.