I guess I'm the oldest of the old guys on this list. I inherited some high
impedance headphones
from my father who used them when he built crystal sets in the 20s. Naturally,
I used them
for my own crystal sets. These babies had 30,000 ohms impedance. 3000 ohms
impedance
would have been consid
On Mon, 14 Sep 2020, Frank Znidarsic wrote:
with this arrangement I can unplug them. These earphones are of a 3000
ohm high impedance design. The voice coil goes over a fixed magnet.
The magnet operates on a thin steel armature with no electrical
connections on it. The sound is very tinny
I found these earphones at local flee market. They were $20. They were made
by Schwarze Electric in Detroit circa 1923. I got them working with a minor
repairs. I tried to attach cotton lamp cord. This did not work out so there
they are with modern earphone wire. At least with this arran
Those are really cool! I hope you're listening to "Dark Side of The
Moon". Did you know it's on the soundtrack of the new Dune movie?
https://www.imdb.com/title/tt1160419/
There's a Jodorowsky Easter egg!
Terry, Communications engineer for 43 years.
On Mon, Sep 14, 2020 at 1:17 PM Frank Znidar
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