Printable View
OG I think this is the driver you posted.. What a cool tweeter with a miniature multicellular horn.Looks like galvanized sheet metal..
http://www.hostboard.com/forums/hbmc...2012/08/11.jpg
http://www.hostboard.com/forums/hbmc...2012/08/12.jpg
http://www.hostboard.com/forums/hbmc...2012/08/13.jpg
http://www.hostboard.com/forums/hbmc...2012/08/14.jpg
AB, it actually looks like "spotted metal" which is used to make organ pipes. It's composition varies a lot by vintage and manufacturer.Quote:
Looks like galvanized sheet metal..
Galvanize processes usually leave a crystalline surface structure.
I think your right now that I look at it closer.. Are you always usually this well informed B ? :Big smile:
Naaaaaaaaaaa, i just happen to know a little about pipe organs, and a bit more about metal. Spotted metal is not an unfamiliar sight for me, even though it can have a variety of appearances.Quote:
Originally Posted by Altec Best
While we're discussing it, it occurs to me that the spotted metal would have some useful damping properties for HF horns. As far as metals go, it's pretty soft and dense usually being a mixture of tin and lead, but can be found with a variety of other metals also mixed in.
Now for the real kicker, as i look closer i'm starting to doubt spotted metal and actually think it's a form of hammertone paint.
It looks like some chipping on the edges, i just wouldn't dare testify to it either way.
That was my initial thought.Quote:
Originally Posted by bowtie427ss
Yes it is definitely some kind of coating (paint/rustproofing) as it is flaking off in spots.And looks like it is rusting in some of those spots now.
i'd love to know if that coating is available today, it mimics spotted metal perfectly. It's unlike the "hammered metal" paints available today.Quote:
Originally Posted by Altec Best
FWIW You can't get much of anything today,that was manufactured yesterday/yesteryear.... Today everything is manufactured as cheaply as possible... End result, things last weeks instead of years/decades...All this IMHO of course !Quote:
Originally Posted by bowtie427ss
Don't forget the EPA/Greenies!Quote:
Originally Posted by Altec Best
Yup... We used to have insecticides that actually worked..Since the EPA got involved now they make stuff that doesn't kill anything..