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Well looky-here. In my shop trash, I found the old OEM balun that came with my CM-5020 antenna. I cleaned the water-induced oxidation off and will reinstall with better moisture resistance and some weep holes.
Actually it may be awhile before I install the OEM because the current CM-94444 balun is doing such an exemplary job. BTW, I cut open a spare CM-94444 and it is of the ferrite coil type, not a PCB. Based on what rabbit73 told us about getting balun lead impedance right, my gut feeling is that the OEM PCB balun is better tuned to the antenna than my lucky CM-94444. But I still don't want to risk it.
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