Is it possible to add a 3.5mm headphone jack to a pair of antique crystal radio headphones?


I am looking to purchase a pair of antique headphones, and possibly fix them up to work like a new pair of headphones.  For example, would it be possible to manipulate these headphones, and add a 3.5mm headphone jack to them?
http://cgi.ebay.com/Frost-Fones-162-1000-early-crystal-radio-headphones-/120647686331?pt=LH_DefaultDomain_0&hash=item1c172998bb

Thanks for your help.

kelseymh6 years ago
I think it would. They are not stereo as built -- the +/- terminals are simply split to provide identical +/- signals in parallel to each earpiece.

In terms of maintaining the integrity of the piece, you might want to just build an adapter to plug the existing end terminals, with a 3.5mm jack on the other side.

Since the leads inside each earpiece are on screw terminals, you could even remove the entire lead assembly and wire up a modern 3-lead stereo jack (common negative, left+ and right+).
Burf kelseymh6 years ago
+1
I've done exactly that with an old set of monaural, aircraft headphones.