Germanium diodes with bias.

[Electronic M]

One thing I've found cool about crystal sets is how some folks will build two crystal sets and use one tuned to a local high power station as a power supply for an amplification stage hooked to another set so as to increase the sensitivity of the other one.

[catman]

G'day all, an interesting one this afternoon, I was listening to my crystal set and biased diode detector feeding my studio amp and speakers when things suddenly sounded rather distorted.

The reason: My (occasionally) poor soldering caused the ground connection of my 100pf RF bypass capacitor to come adrift and my audio preamp reacted badly to the unfiltered RF being fed into the preamp, causing audio distortion. Regards, Felix (vk4fuq) aka catman.