sr1200
Well-known member
I recently put together a unit based on the schematic/layout below:
https://www.tedweber.com/media/kits/5g15_layout.jpg
https://www.tedweber.com/media/kits/5g15_schem.jpg
I have pretty good voltages except at the 12at7 pin 1 where im getting around 120v instead of 105 (a little high).
I noticed that the 12AT7 tube gets warm, (hot if left on for a while) but i dont see a filament glow. Is this normal?
All i get out of the unit is a strange (non 60hz) hum. It goes away if i turn the mix all the way down, but does not pass audio from the input. I will be trying to trace out the signal tonight on the scope. Was just wondering if anyone had any experience building one of these and if they've seen similar issues or had some insight on what to look for.
EDIT: I would ask on webers forum, but it seems to no longer exist...
Thanks
https://www.tedweber.com/media/kits/5g15_layout.jpg
https://www.tedweber.com/media/kits/5g15_schem.jpg
I have pretty good voltages except at the 12at7 pin 1 where im getting around 120v instead of 105 (a little high).
I noticed that the 12AT7 tube gets warm, (hot if left on for a while) but i dont see a filament glow. Is this normal?
All i get out of the unit is a strange (non 60hz) hum. It goes away if i turn the mix all the way down, but does not pass audio from the input. I will be trying to trace out the signal tonight on the scope. Was just wondering if anyone had any experience building one of these and if they've seen similar issues or had some insight on what to look for.
EDIT: I would ask on webers forum, but it seems to no longer exist...
Thanks