[Boatanchors] Do Headphones Age-Away?

[1oldlens1]

For the most part no  Some magnetic phones can lose some.magnet strength if subjected to constant voltage through the windings in a direction that tends to counter the magnets but in the other direction it tends to boost them.  In the absence of dc.there is very little change.  For the most part magnets don't age However, phones can lose sensitivity if the spacing of the diaphragms changes.  Are these perhaps Trimm Featherweight phones? They were made in a variety of impedance including the "special " 24 Kohms for crystal sets.  DC resistance is about 5K.  These are very sensitive phones.  Also the two sides should match.Sent from my Galaxy
-------- Original message --------From: David Stinson <arc5 at ix.netcom.com> Date: 8/12/22  8:58 PM  (GMT-08:00) To: "Boatanchors at mailman" <boatanchors at mailman.qth.net> Subject: [Boatanchors] Do Headphones Age-Away? I have a set of Featherlight 12,000 Ohm headphonesI've had since I was a young boy.  They were "sensitive"for crystal radio sets, giving lots of volume (for phones).Now, they're pretty weak.Is anyone familiar with this "aging" of Hi-Z phones,why it happens and if anything can be done about it?-- This email has been checked for viruses by Avast antivirus software.www.avast.com______________________________________________________________Boatanchors mailing listHome: http://mailman.qth.net/mailman/listinfo/boatanchorsHelp: http://mailman.qth.net/mmfaq.htmPost: mailto:Boatanchors at mailman.qth.netList Administrator: Gary Harmon, K5JWK** For Assistance: gharmon at idworld.net **This list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.htmlMessage delivered to 1oldlens1 at ix.netcom.com