Technical Topics

From HF Underground

Contents 1 Antennas 2 Receivers 3 Signal Conditioning and Processing, Error Correction 4 Transmission Modes 5 Transmitters

Antennas

• Beverage
• Dipole
• Random Wire
• Wellbrook ALA 1530plus

Receivers

• Degen DE1103
• Internet Receivers
• Kaito KA1102
• Radio Shack DX-440 - Also known as the Sangean ATS-803A
• Sony ICF SW-7600G
• Software Defined
• Tooth Fillings
• Yupiteru MVT-9000
• Icom R75
• Century 21

Signal Conditioning and Processing, Error Correction

• ARQ - Automatic Repeat Request
• Bandpass Tuning
• Digital Signal Processing
• FEC - Forward Error Correction
• Noise Blanking
• Notch Filter
• Noise Reduction
• Signal Attenuator - DX/Local switch
• Synchronous Reception
• Timewave DSP-599zx

Transmission Modes

• AM
• CW
• FAX
• FM
• HELL - Hellschreiber
• KG-84
• PSK31
• RTTY
• SSB
• SSTV

Transmitters

• Corsair
• Grenade
• Icom IC706 MkIIG
• Icom IC746
• Kenwood TS-440
• Kenwood TS-480