Hi. Long time Koetsu Jade user so I thought I'd try to help
I can't find the exact gain of thr PH7 but I'm assuming it's in the mid 50's. that should work fine with the 0.6 mv of the Urishi.
Regarding loading, 30 ohms is way too low. I don't know where you got that number but perhaps that was a reccomendation for using with a step up transformer where the range is typically between 5-30 ohms. Straight into a conventional phono stage it needs to be be higher. Currently, I'm loading my Jade at 1000 ohms with an Atma-sphere MP 3 which is a tubed preamp Lower than that and I thought their was less air and less extension at the frequency extremes. Typically with solid state you would start at 100 ohms Now were all a little guilty of using loading as a tone control but done to excess it may produce a likable sound but you'll never hear what the cart is truly capable of. Would try listening at 100,500,and 1000 ohms and decide what you like. You can than try in between values and again decide
Finally don't get to obsessed with it. Find a setting you like and go enjoy some music.
I can't find the exact gain of thr PH7 but I'm assuming it's in the mid 50's. that should work fine with the 0.6 mv of the Urishi.
Regarding loading, 30 ohms is way too low. I don't know where you got that number but perhaps that was a reccomendation for using with a step up transformer where the range is typically between 5-30 ohms. Straight into a conventional phono stage it needs to be be higher. Currently, I'm loading my Jade at 1000 ohms with an Atma-sphere MP 3 which is a tubed preamp Lower than that and I thought their was less air and less extension at the frequency extremes. Typically with solid state you would start at 100 ohms Now were all a little guilty of using loading as a tone control but done to excess it may produce a likable sound but you'll never hear what the cart is truly capable of. Would try listening at 100,500,and 1000 ohms and decide what you like. You can than try in between values and again decide
Finally don't get to obsessed with it. Find a setting you like and go enjoy some music.