Bob and the group, old hard earpiece external head sets like Mil cans
from early radio on, can be converted to be comfortable to wear. All
you need are some foam "sponges" that are sold for ladies make up
compacts. These are disks that are about 1/2 inch thick and solid. For
headphone cushions, you cut out a circle larger than the hole or holes
for the sound outlet on the cover side that normally rests over the
ear. This is for hard rubber phones that have lost their rubber
cushions or never had any. These sponges sell for a bag of them about
8, for $2 at Walgreens or other drug stores.
Makes the most compfortable headphone out of old Trimm, Acme, or
Baldwins you have ever had. Now you can stand wearing them for hours of
listening. These old phones come in various impedances, 600 ohm, 1000,
2000, and as high as 15,000 ohms in magnetic types. The so called
"crystal" headphones were even higher impedances.
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