Current bugbears

Jim Thompson jim at
Tue Sep 4 20:52:11 CEST 2007

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:

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