Picked up a "CB radio" type frequency counter ($5 yard sale score!) with an RCA jack on the back and I'd like to use it for some light testing, etc. I'm doubting the accuracy of the frequency counter though. I mean, it's in excellent condition, but it's an unknown piece of equipment.. There IS a calibration adjustment inside the FC, but I'm unsure how I could actually generate a test frequency in which to calibrate the FC against. I DO have a BK Precision 2005B analog signal generator, the only caveat is, it's analog and unless I have a FC reading it, I have no sure 100% idea of where it's transmitting. I see there's a port to plug in a crystal on the front. I have some junk CB's in the parts bin that I could perhaps rob a crystal out of, would that work, or is that not what that's for? I also have an Icom 718 HF rig, would I perhaps be able to transmit a very low power into a dummy load on say, 7.000.00 or 14.000.00 or something and use this to calibrate the FC? I understand I'm not going to obtain a precise calibration other than sending this thing off to a lab or something, or finding someone with a calibrated and highly accurate RF source.. At the same time, I wouldn't expect 100% accuracy from a FC of this design/purpose anyway.