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2475-130 Raa OT


I'm repairing a 2475-130 with a 12AX7 as PI. Caps weak, some R drifted away, all changed yet.

May be the OT is faulty, and I 'm looking for a replacement OT. The only type I found is a TAD for the 2485-130 with a Raa of 4.7k (4x EL34 at 702V plate) and a TAD for the 2475-150 with a Raa of 2,8k.

Does anybody know the Raa of the original OT? At the moment is built in a Welter OT with 5k Raa. Raa 4,7k is a reliyable value?

Thanks and bye