looks like a pretty huge change going from a 2.5mv output to a 0.5mv output. First off the suggested weighting on the new cart is 2.3gram which is more than your original cart. Looks like the low output Ortofon needs a load impedance of 20ohm, and your preamp has only 47kohm and 100ohm. So try 100ohm, but you might need less. If you can borrow another phono preamp that might be helpful or borrow a step up transformer. Make sure the cart is parallel or if you can zoom in on the stylus check to see if it sitting level in the groove. or try normal vinyl, 180gram, and 200gram to see if one gives you more highs pointing out that your arm height needs to be adjusted.
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VTA is the first thing I would check. Raise the tonearm by several millimeters and see if that improves things.
Ortofon recommends an input load impedance greater than 20 Ohms. 100 Ohms should be fine. But if you want to try 20, you can make RCA cheater plugs with either a 27 or a 33 Ohm resistor wired in parallel.
everything appears to be set properly but my high end is missing ...What procedure did you follow to set this up? Did you use a gauge with a mirrored surface that actually aligns the cantilever, such as the Mint or WallyTractor gauges? Did you use a VTA gauge?