Receiver/Scanner Preamp Circuit

  
The low-cost Mini-Circuits MAR-X series of chips offer the RF builder a real advantage, with their inherent 50- input and output impedances (needed for RF systems). An MAR-1-based receiver/scanner preamplifier is shown. Ci and C2 are chip capacitors. Use 0.01 for HF, 0.001 for VHF, and 100 pF for above 100 MHz, depending on the low-frequency limit that you desire.
Receiver/Scanner Preamp Circuit - schematic

C3 can be a ceramic disc of 0.01 or 0.001, depending on frequency range. LI is an RF choke that is suitable for the frequency range that you desire (0.1 to 10uH).




Leave Comment

characters left:

New Circuits

.