02-25-2015, 06:18 PM
Smell and asphalt dripping are indications of transformer trouble.
Looked at a lot of your pictures & didn't see anything like asphalt dripping out of Xformer. BTW nice pictures. Lucky you don't have the rubber insulation on the hook up wire that has fallen apart.
Do the light bulb / dim bulb in series with the AC power and pull all the tubes before trying power on the Xformer - you gotta pull em sometime anyway. A 25W bulb should be plenty big. With no tubes should be almost no current, only thing I see are a couple of pilot lights.
Anyone know what went on the back of the 3 small speaker frames. Clean so looks like something has been removed. Were they speakers? The mechanical behind the cone looks like passive radiators which seems weird in an open case.. The only diagram I have is Beitman 38-116 and it is a code 121. Audiophool has a 39-116 also a code 121 and a quick glance shows the 39 uses a 80 rectifier. Both of those only show 1 speaker.
Cut speaker cone leads sounds like a speaker had a problem. Someone left the plate lead / choke coil. My guess the RCA jack was for an external PM speaker.
As Jerry says watch the AC on the plate supply winding. The 39 uses different outputs but schematic has voltages and gives the PS high voltage as 370 VDC. As a full wave that would be around 270-0-270 VAC plate winding. If it is the same as the 39, transformer leads would be yellow - yellow green - yellow. about 540 VAC yellow - yellow. Considering: - rectifier loss + rectifier filament would not be surprised to see 600 VAC yellow - yellow
Looked at a lot of your pictures & didn't see anything like asphalt dripping out of Xformer. BTW nice pictures. Lucky you don't have the rubber insulation on the hook up wire that has fallen apart.
Do the light bulb / dim bulb in series with the AC power and pull all the tubes before trying power on the Xformer - you gotta pull em sometime anyway. A 25W bulb should be plenty big. With no tubes should be almost no current, only thing I see are a couple of pilot lights.
Anyone know what went on the back of the 3 small speaker frames. Clean so looks like something has been removed. Were they speakers? The mechanical behind the cone looks like passive radiators which seems weird in an open case.. The only diagram I have is Beitman 38-116 and it is a code 121. Audiophool has a 39-116 also a code 121 and a quick glance shows the 39 uses a 80 rectifier. Both of those only show 1 speaker.
Cut speaker cone leads sounds like a speaker had a problem. Someone left the plate lead / choke coil. My guess the RCA jack was for an external PM speaker.
As Jerry says watch the AC on the plate supply winding. The 39 uses different outputs but schematic has voltages and gives the PS high voltage as 370 VDC. As a full wave that would be around 270-0-270 VAC plate winding. If it is the same as the 39, transformer leads would be yellow - yellow green - yellow. about 540 VAC yellow - yellow. Considering: - rectifier loss + rectifier filament would not be surprised to see 600 VAC yellow - yellow
