How much should I believe the received freqs. in the database?

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AC2GW
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How much should I believe the received freqs. in the database?

I'm setting up a new antenna. I've been testing it with a QCX 40m with GPS calibration.
Right now I have to use indoor antennas, I tested a new 40m OCFD antenna just strung up around the ceiling in a room, and most of the receives were spot on frequency.

Today I installed it in my garage.. So far the results look good to me however some received frequencies are just above the subband.
I transmitted on 7.040125, -- got received at 7.040210 in the worst case.

Can I assume those are uncalibrated receivers?

Stephen
AC2GW