Here’s an excellent pair of Murdock No. 55 headphones. These are very sensitive headphones (tested impedance is 2340 ohms — see last photo), ideal for crystal radios and tube radios with low output.
Here’s an excellent pair of Murdock No. 55 headphones. These are very sensitive headphones (tested impedance is 2340 ohms — see last photo), ideal for crystal radios and tube radios with low output.