A year on from my last post I have now put some NOS Tesla ECC83,s in the valve reg stage. I was not expecting much difference but the improvement was dramatic. I have had enough NOS Tesla,s to do this for ages but only did this last night as an experiment.

The soundstage was far bigger and the sheer presence of vocals was astonishing. Everything became more focused and detailed and the whole sound lost some of its coarseness in comparison with the JJ Teslas I had previously in the regulation stage. Wish I had done this sooner.

My 12BH7A arrived today - a1960,s NOS GE 12BH7A with gold Frame Grid This will be popped in the linestage next weekend so could improve things even further

I will update when it has burnt in.