The National SW-3 “All A.C.” Version at KY6R
The first thing I had to do is decide which of two SW-3’s I would use for my receiver. The “All A.C.” model won because:
The circuit in my SW-3 “All A.C.” version
The second set is now my parts set, and the first thing I did was move the better “Velvet Vernier” dial mechanism from the parts box to this box. I also was able to put the cover that looks like a shiny round ball over the vernier mechanism – and now it looks really great.
I was able to order a set of tubes from Antique Electronic Supply, and they were very reasonably priced. Two 6C6’s and one 27 tube. These are NOS – and I think its pretty cool that these old tubes are still available and priced as well as they are. WIth the second set of parts – I will be set and will be able to do my own work. I’ve already learned a lot about the design of this receiver – from that James Millen article, reading online forums on what to consider and watch for with the different versions of this receiver, and the power supply considerations.