Hi Johnny7: Check out the APOG.
Absolute best source I've seen for you is the APOG (Atmos-Phere Owners Group) at www.otlamp.com. Site includes an OTL Online Forum of all atmos-phere junkies. There are a few great articles there too. Read the one by Tomcik called "The Missing Link in Speaker Operation." Best explanation of damping and speaker matching I have ever read and essential to read if you are trying to match speakers and cables to your OTL. I think it dates from 1954.
Sincerely, I remain
Absolute best source I've seen for you is the APOG (Atmos-Phere Owners Group) at www.otlamp.com. Site includes an OTL Online Forum of all atmos-phere junkies. There are a few great articles there too. Read the one by Tomcik called "The Missing Link in Speaker Operation." Best explanation of damping and speaker matching I have ever read and essential to read if you are trying to match speakers and cables to your OTL. I think it dates from 1954.
Sincerely, I remain