Well I have checked all the frequencies used for a ref in the rv-75. When I turn it on with 7 mhz selected, I get 7250.1 all bands check out like this. I cannot get it to increase in freq only decrease whichever way I turn the knob. I am at my wits end with this for now. Will place it on back of bench for awhile.? All voltage ref's are good or within spec.