The restoration of my R-390 is almost complete. I need 2 audio transformers, T601 and T602 to complete the job. Both transformers are the same type and I think that they are the same for both the R-390 and R-390A. I believe one of both of these are removed during the Klermenos audio mod. So if you have an extra transformer, I know where there is a needy R-390. Andy