RX - RX preamp BOX
This revision is from 2019/10/14 21:07. You can Restore it.
This is very simply preamplifier BOX module with 2N5109 transistor based on W7IUV design. You can use it as high IP preamplifier for RX antennas (beverage, DHDL, flag etc). Gain is up to 18dB and there is also build in variable ATT. You can easy set the gain as high as you need! As well you can set right transistor bias with multi turn potentiometer. Two relays offer bypass switching if there is no power supply voltage. You can use external power supply connected to the box or the bias tee box for power over the coax.
Applications
- High IP RX preamplifier - RX antennas
- Buffer amplifier
- Driver amplifier
Schematic
Board
Settings
- Variable Attenuator and RF protections:
- Transistor Bias current:
- Power over coax :
