11-16-2017, 03:15 PM
Good progress over the last few days. All recapped and several of the dogbones replaced. I did add an inline 1.5 amp fuse to the hot side of the line and repro power cord and polarized plug. Here's the underside ready to go.
[Image: https://www.dropbox.com/s/7d91bl84f4wkox....jpg?raw=1]
I put the tubes back in and powered it up. The filaments all came on except I could not see anything in the 80 tube. No sound at all in the speaker. Did I forget to check the power tranny before I started? Secondary across the two 80 plates looked ok as did the secondary on the 80 filaments. Checking the primary at the power plug blades I was getting fluctuating readings ranging from .5 meg on down to a few k so I unsoldered one of the primary leads to the on-off switch and measured the primary directly. Looks ok at a few ohms so the problem has to be in the on-off switch or my solder joint....it was my solder joint. Resoldered the tranny lead and fired it back up to the sounds of my SSTRAN station. The shadow tuning even works although I think I can adjust it to be a bit brighter. Can't believe it but there is still one of Philco's special straight filament light bulbs on the shadow graph.
[Image: https://www.dropbox.com/s/ly1bdd52ereyye....jpg?raw=1]
I still need to do some chassis cleanup, the tuning cap is pretty dirty and the dial scale needs to be replaced. The volume control pot was a bit scratchy. I'll also check alignment but it seems to be pretty good. The tube shield has some surface rust I need to take care of but I'm happy its playing with no major problems. The cabinet work is under way but that's another story...
[Image: https://www.dropbox.com/s/7d91bl84f4wkox....jpg?raw=1]
I put the tubes back in and powered it up. The filaments all came on except I could not see anything in the 80 tube. No sound at all in the speaker. Did I forget to check the power tranny before I started? Secondary across the two 80 plates looked ok as did the secondary on the 80 filaments. Checking the primary at the power plug blades I was getting fluctuating readings ranging from .5 meg on down to a few k so I unsoldered one of the primary leads to the on-off switch and measured the primary directly. Looks ok at a few ohms so the problem has to be in the on-off switch or my solder joint....it was my solder joint. Resoldered the tranny lead and fired it back up to the sounds of my SSTRAN station. The shadow tuning even works although I think I can adjust it to be a bit brighter. Can't believe it but there is still one of Philco's special straight filament light bulbs on the shadow graph.
[Image: https://www.dropbox.com/s/ly1bdd52ereyye....jpg?raw=1]
I still need to do some chassis cleanup, the tuning cap is pretty dirty and the dial scale needs to be replaced. The volume control pot was a bit scratchy. I'll also check alignment but it seems to be pretty good. The tube shield has some surface rust I need to take care of but I'm happy its playing with no major problems. The cabinet work is under way but that's another story...
