bob's data: Bob's useful electronic data & project plans
Projects & Information:

High Selectivity Crystal Radio
with Short Wave

High Sensitivity BFO
Metal Detector

Battery Life Chart

Parabolic Microphone

Ultra High Gain Audio Amplifier

Audio Sine Wave
Generator

Telephone Line Use Monitor
one tube receiver
One Tube Receiver

Moisture Detector

Vacuum Tube Amplifier
   

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Site design by Kim Mason Design
Special thanks to Wild Autumn Design
Home | High Selectivity Crystal Radio with Short Wave | High Sensitivity BFO Metal Detector
Battery Life Chart | Parabolic Microphone | Ultra High Gain Audio Amplifier | Audio Sine Wave Generator
One Tube DX Receiver | Telephone Line Use Monitor | Moisture Detector | Vacuum Tube Amplifier