Dynaco ST-70 totally restored vs Dynaco ST-70 Kit

Does Primaluna uses cheap parts compared to the Dynaco ST-70 Kit?

The Primaluna is made in china(cap omitted intentionally). That should answer your question.

am considering a stereo 70 myself. i will only buy an original, stock stereo 70. if i want more "resolution", i'll buy another amp.

why take an orange and turn it into an apple, when you can buy an apple ?

Me too! The power tranny in the original model is fine, no need to step up to a larger rating. if not, why do they last more than 20+ years and counting?

For me, I am bias to the true original output transformers the ST-70 uses. I agree, that the input board needs to be replaced (I use one with 6922 drivers) as well as the power supply main caps (if not replaced already!) and the selenium rectifier. I heard and compared other ST-70 wannabees (not the original power and output transformers) and to me, there is no substitute for the original.

My opinion only.

i am considering a stereo 70 myself. i will only buy an original, stock stereo 70. if i want more "resolution", i'll buy another amp.

why take an orange and turn it into an apple, when you can buy an apple ?

Agree 100%. I have a completely UNRESTORED ST70 in pristine condition. It makes my (restored!) Quad ESL 57s sound incredible.

If you don't like the original, get a different amp.