30 mhz low pass

30 mhz low pass

Operating Modes : Satellites : CubeSats

• FunCube Dongle HF Upconverter: Expanding Reception Range - This article describes an HF upconverter for the FunCube Dongle Pro. Designed for radio amateurs, the converter extends reception capabilities to lower frequencies (0 Hz to 30 MHz) by mixing them with a higher oscillator frequency (100 MHz). This translates the desired signal into a range detectable by the FunCube Dongle (64 to 1,700 MHz). Key components include a double-balanced mixer and a low-pass filter to suppress unwanted signals. The project provides schematics, filter specifications, and design considerations for construction.
  [ Hits: 34 | Votes: 1 | Rating: 8 ]

• A low pass filter circuit - A simple 7 element, Chebyshev low pass filter, rolls of at 30MHz. Attenuation is better than -40dB at 60MHz, -65dB at 90MHz, -80dB at 120MHz.
  [ Hits: 5303 | Votes: 21 | Rating: 6.1 ]

• Television Notch Filters - Intersting article about TV interference, with several examples of TVI Filters, to reduce the passage of any RF above the 30 MHz including commercial Low Pass Filters, home made notch filters or coaxial filters.
  [ Hits: 454 | Votes: 2 | Rating: 3 ]