I have a new Uniden Bearcat 980SSB. It is in my basement. I am running it out to K-40 Mag mount antenna that sits outside my basement window. I placed it on two over lapping large round cookie sheets for its steel base. These round steel sheet sit directly on the ground.
The reading on my internal bear cat SWR are as follows
Ch 1: 2.1
Ch 20. 1.2
Ch 40: 1.00
However, on may Astatic PDC1 external SWR meter, my readings are:
Ch 1: 2.2
Ch 20. 1.8
Ch 40: 1.5
I'm not sure why there is a slight difference. Are these readings okay, given the set up I've described?