get abc but canot get cbs nbc or fox

[tom-orchid]

Have a mohu antenna

 

[Corwin65]

Try https/www.channelmaster.com/Antenna-Selection-a/134.htm to see what channels you can expect in your area.

 

[americanaudiophile]

Try reorienting the antenna and run the channel scan each time. Higher is better too.
You might need a better antenna. If yours isn't active then getting one that is would help. A roof antenna is always best if you can manage that.