A good rule of thumb (i.e. place to start) is 25 times the coil resistance of the cartridge. That generally winds up somewhere between 100 - 1000 ohms as most moving coils have an internal resistance between 4 and 40 ohms. Then you can vary it up or down 50% (from the 25 times number) until you get the best results.
I have both the Jubilee and Windfeld here and in 5 different phono stages including Manley Steelhead, Art Audio Vinyl Reference, Atma Sphere MP-1 (phono version), and Oracle Temple the ideal loading should lie between 125 and 175 ohms.
Pay no attention to the first post's obvious lack of experience.
Dealer disclaimer.
I have both the Jubilee and Windfeld here and in 5 different phono stages including Manley Steelhead, Art Audio Vinyl Reference, Atma Sphere MP-1 (phono version), and Oracle Temple the ideal loading should lie between 125 and 175 ohms.
Pay no attention to the first post's obvious lack of experience.
Dealer disclaimer.