/diy/ - Do It Yourself

>>1356587
>should probably get one
Get at least two, one for each ear. Listening with both ears sounds much better. Have two 3.5mm output jacks in parallel. If stereo, leave R (ring) unconnected. Make sure the earplugs are not anti-phase (left and right but no center). If they are (50% chance), just swap the polarity (tip and sleeve) of one output jack. You can use crococlips to select the best taps on the coil.

The audio quality of the piezo earplugs is worse than that of an AM station and a better way to listen is using (sensitive) 32Ω earphones and an output transformer for impedance matching. You will be amazed how good your local station sounds because you receive the full bandwidth, not only the part the IF filter of a typical AM radio lets through.