May be viewed at

https://nandusthoughts.blogspot.com/2016/02/some-thoughts-on-uhf-crystal-radios.html

Regards,

Nandu.

 

a couple of ferite beads or an rf choke in the headphone leads should stop rf leakage through the headphones, and increase output.

 

Use a 1N21 microwave point contact diode. They will efficiently rectify millivolt signals up to past 10ghz. If you can't find any surplus, email me and I will send you a few.

 

Use a 1N21 microwave point contact diode. They will efficiently rectify millivolt signals up to past 10ghz. If you can't find any surplus, email me and I will send you a few.

What is the cost for your 1N21diode ?