Hello cgn-dt-n!
Thank you very much! This helps me a lot!
I didn‘t know there is a different version using 300B tubes. Is there any more information available online somewhere?
How can I contact Dennis Had if I wanted to order one? I tried it via eBay a couple of days ago but so far no response. Not sure if he answers all requests.
Larger output transformers are most likely always the way to go