[R-390] Mackay 3007A

[N4TUA]

 THANK YOU Al; W8UT, Tom; K4NCG and Don for the help.
I am beginning to think this is a rare receiver or at least the manuals are rare. This receiver is running now but will need some more work. I replaced all (4) plug in capacitors (note R-390A similarity), one cooked and vented/blew the fuse. This receiver is a transformer-less receiver and makes B+ from the 120 volt line. I am working from hand drawn schematics parts and pieces which I have started developing as I troubleshoot. I am not sure but it looks like the 120 volt input needs to float from ground. In other words it may need an isolation transformer or run it with out a ground wire connected. It looks like the B+ is centered at chassis ground like +45 volts to ground and -45 volts to ground = 90 volts B+. As you can tell I have much more to do, sure wish I had a schematic...

Best 73, Collin