Thanks for the post….. Wow, that’s an old one! I must admit I don’t remember it at all.
I’m sorry, I don’t have any circuit information on those very early VC1 models, they did vary quite a bit, and only settled down at the VC1Qcs model when I changed from a conventional transformer input to the more rugged ‘cs’ version.
I will have a rummage at the office on Monday, but I don’t hold out much hope. 