My cb has an swr meter but no calibrate option?

What radio is it? There are a few that automatically calibrate now...

 

Fix the antenna system, or (2) buy an external swr bridge to verify the readings, (3) take it to a tech

 

My new dx-959b is auto callibrate.

 

Is it accurate?

 

Seems to be.

 

I have always heard not to trust them, but found them to be really close, as long as a golden screwdriver had not been there.

Just replaced the finals in a tyt this morning the guy who owns it was swearing it was bad out of the box, but I had almost an hour of replacing those stupid diodes , you can hardly see and cleaning up someones Mars Mods. amazing what can happen during shipping, cause we all know hams would not lie about turning screws.

Last week before the cataract surgery I would not even been able to see the diodes, dam they got small.

 

I could do the mars/cap mod on my ft857d, but I don't take part in mars or cap. I have seen some of these out of band mods mess radios up too.