Ask Dr. SETI ®

• Don't Radio Telescopes Magnify Light?
• Efficiency of Parabolic Antennas
• Phasing Several Smaller Antennas
• Stabilizing Crystal Oscillators
• Cooling Low Noise Amplifiers
• Antennas in Limited Space
• Condition of Surplus Dishes
• 4 GHz SETI
• Choosing RF Cable
• Searching with DBS Dishes
• Dish Surface Accuracy
• Dicke Switches
• Design of Microstrip Filters
• Impedance Matching for Antenna Feeds
• Small Dish SETI
• Why an SSB Receiver?
• Clarifying deciBels
• How Much Preamp Gain?
• Arecibo's Range
• Where Should I Point My Dish?
• Total Power Radiometry
• Birdbath vs. Meridian Transit
• How Do Parabolic Dish Antennas Work?
• Reducing RFI
• Dish Mesh Spacing
• Do Signals Degrade to Thermal Noise?
• Shouldn't Earth Temperature Dominate?
• RF Absorption of Polystyrene Foam
• Can a Narrow Signal Carry Intelligence?
• The Day the Earth Stood Out
• Radiation Hardened Interstellar Probes
• TeraFlop Processors for Project Argus
• Project Argus Dish Siting
• Transmitting Beyond Hydrogen
• Is My LNA Oscillating?
• Hiding from SETI
• ATA Dish Design
• Calculating EIRP
• What Happened to the Screensaver?
• What 's Special About 9.24176684 GHz?
• Following Up on Past Detections
• Power Measurements with a Spectrometer
• Feasibility of Amateur Active SETI
• How Long Do We Have?
• Antenna Temperature