Chris Gillies <
gilliesc@mts.net> wrote:
On 2021-07-07 8:42 a.m., Scott Dorsey wrote:
SM-57 with an A2 windscreen, just like the president uses! A great choice in
bad weather.
I used to have a bunch of those (from the late 70s I'd guess). I loved
them but the A2 foam rotted away after 10 years, while the the big puff
balls made for SM58s are still fine even today. Does anyone know if
modern A2 versions are made with a more stable foam? They were a tad
pricey at the time.
I can't say specifically about those, but in general the urethanes of the
1970s were not stable and urethanes today pretty much are. Speaker surround foams fell apart, urethane pinch rollers became gooey, and Ampex 456 with thermosetting urethane binder went sticky. All of these are basically the
same problem and today it's a solved problem and shouldn't be expected to happen.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."
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