The D3a is working well for me, I am still trying this and that. I am about due for an update over at GB, so I wont go into detail. To be honest this setup may be guilty of being a little bit larger than life. I will take them to the Bottlehead meet and see what everyone thinks.
I will have to revisit the DRD. What is now the DRD45 uses the James outputs and a really trick universal power transformer. But that is a project for a bit later on.

One thing I want to point out is this amp (the non DRD) has used the same power supply, 300b’s, and output transformers (Lundahl 1623) and by changing only the driver/input stage has turned it into 4 or 5 completely different amps. If I had started with the SSRP I may have given up on the 300b. Yet this works well for others.

I am curious as to who the 6ah4 will sound. Do you have a link to the schematic?

Happy Independence day…John