Open Terminal (Command Prompt) Window - icon in side menu bar

At command prompt type  lsusb

Verify you can find  "Realtek Semiconductor Corp."  device

At command prompt type  rtl_test -t

Verify that the RTL test passes

At the command prompt type  gnuradio-companion  or use  icon on desktop or icon in side menu bar

In GNUradio Companion do the following:

1. Change Options "ID = DEMO", "Generate Options = WX GUI" 

2. Add "Sources -> RTL-SDR Source"

3. Change samp_rate to "2e6"  (2 million samples/sec) 

4. Change RTL-SDR Source  "Ch0: Frequency = channel_freq"

5. Add "Instrumentation->WX->WX GUI FFT Sink"

6. Connect RTL-SDR Source to FFT Sink

7. Change FFT Sink "Average=ON" and "Baseband Freq = channel_freq"

8. Add "Instrumentation->WX->WX GUI Waterfall Sink"

9. Connect RTL-SDR Source to WX GUI Waterfall Sink

10. Change Waterfall "Baseband Freq = channel_freq"
   
11. Add "GUI Widgets->WX->WX GUI Slider

12. Change GUI Slider "ID = channel_freq", "Label = Frequency", "Default Value = 97.9e6", "Minimum = 88e6", "Maximum = 108e6", "Num Steps = 1000"

13. Copy and paste channel_freq slider

14. Change 2nd slider "ID = af_gain", "Label = Volume", "Default Value = 1", "Minimum = 0", "Maximum = 10", "Steps = 100"

15. Add "Filters->Low Pass Filter"

16. Connect RTL-SDR Source to Low Pass Filter

17. Change Low Pass Filter "Cutoff Frequency = 75e3", "Transition Width = 25e3"

18. Add "Filters->Rational Resampler"

19. Connect Low Pass Filter to Rational Resampler

20. Change Rational Resampler "Decimation = 4"

21. Add "Modulators->WBFM Receive"

22. Connect Rational Resampler to WBFM Receive

23. Change WBFM Receive "Quadrature Rate = 500e3", "Decimation = 1"

24. Add "Filters->Rational Resampler"

25. Connect WBFM receive to Rational Resampler

26. Fix "Data Type mismatch" by highlighting Rational Resampler block and use up and down arrows until input matches WBFM receive output

27. Change Rational Resampler "Decimation = 500", "Interpolation = 48"

28. Add "Math Operators->Multiply Const"

29. Connect Rational Resampler to Multiply Constant

30. Change Multiply Const "Constant = af_gain"

31. Add "Audio->Audio Sink"

32. Connect Multiply Constant to Audio Sink

33. Change Audio Sink "Sample Rate = 48KHz"

34. Add "GUI Widgets->WX->WX GUI Notebook"

35. Change WX GUI Notebook "tab1 = FFT", "tab2 = Waterfall"

36. Change FFT Sink "Notebook = notebook_0,0"

37. Change Waterfall "Notebook = notebook_0,1"

38. Build and execute or use "Build -> Execute" or (F6)

VHF_NARROWBAND

1. Open VHF_NARROWBAND project

2. Copy and Paste NBFM Receive block

3. Change 2nd NBFM Receive block "Max Deviation = 2.5k"

4. Add Misc->Selector

5. Change Selector "Num Outputs = 1"

6. Add GUI Widgets->WX->WX GUI Chooser

7. Change WX GUI Choooser "ID = deviation", "Label = Deviation", "Choices = [0,1], "Labels = ["5k","2.5k"]", "Type = Radio Buttons", "Grid Position = 0,4,1,1"

8. Change Selector "Input Index = deviation"

9. Build and execute or use "Build -> Execute" or (F6) 

GQRX is also available. Close GRC, open a new terminal window then type "gqrx"