[Milsurplus] Corning glass caps

[Boeing377]

I put some of these Corning glass caps in a mil rcvr in 1967 to replace OE leakers and they are still working fine. I like them a lot.
The audio nuts pay BIG bucks for certain Corning glass caps as they have a "distinctive sound with sparkling spectral purity". 
These same nuts blog about which mining regions in Chile produce the best sounding copper, 


This guy attempts to prove that caps differ in "sound". http://conradhoffman.com/cap_measurements_100606.html


He writes: 

polyester (Mylar) ranges from bad to terrible and is to be avoided unless you like the sound





AF6IM
www.parachutemobile.com
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