Hi again David,
I’ve attached an updated spice model of Bo Hansen DI-box. The picture you’ve linked in the first post
refers to an old schematic, some components have been changed.
R3 and R4 are now 100K, and C2 10 uF.R10 changed to 100 ohms and C5 0.1 uF.In the previous file
I ‘ve not reported correctly the fictitious voltage (provided by the phantom power): is not 48V but 24V.In this project file I’ve added the phantom power supply. About the Lundhal LL 1538 transformer, the L1/L2 ratio is ok, but I’ve changed the values of the impedances to values more suitable for the size of the transformer.