Cheers Old Mate!

(Yes, I did mean SM57!!)
Like you, need a window of opportunity,
but, an interesting idea, nonetheless.

Thanks mate

Ralphie.

PS. Must show you my Polyphonic Spree Copper Microphone sometime.
Made from genuine US Carbon Granule technology!
Getting back to the subject of this thread, I'm experimenting with it to try and re-create old Alexander Prince cylinders. Even using the original surface noise, looped many times.
Doing it all at home too.
Couldn't imagine many commercial studios would want to waste their time on such a project!

All that money invested in the best equipment just to produce the sound of a crackly telephone!!