Re: Current bugbears

[Jim Thompson]

On Sep 4, 2007, at 8:30 AM, mcb, inc. wrote:
On Tue, 4 Sep 2007, Richi Plana wrote:

Fascinating. So "passive receivers" really aren't? Or are there  
classes
of receivers which are (no amplification or very sensitive pickups)?

Crystal sets.

no amplification: yes
very sensitive: no.... crystal sets require a very strong AM  
modulated signal.

If you have a very strong AM signal, and your construction skills are  
good, you don't even need the crystal:
http://bizarrelabs.com/foxhole.htm