02-04-2018, 03:38 PM
Thanks for the info Arran! I was reading about the shuttledials and had heard of them but never really knew what they were about until I saw a Youtube of one in action.
Interesting that you mentioned the resistors. There are a mix of dogbones and newer carbon resistors. I will check them but there is also an 82ohm wirewound resistor that connects the CT of the power transformer to chassis ground. I believe originally it was the piece circled in yellow but at some point in the past was replaced. I do measure 82 ohms between the CT and chassis so there is a resistor in the circuit but I haven't located it yet. I wanted to be sure its not just a 1/4 watt one. Its gotta be there.
[Image: https://www.dropbox.com/s/yyk74ejiavhlqp....jpg?raw=1]
[Image: https://www.dropbox.com/s/n4vxckrofx6p7e....jpg?raw=1]
Yes, just a 6U5 tube. Unfortunately the wiring into the tube socket is the old rubber stuff so It will need resleeving or replacing. Looks like most (but not all) of the rest of the wire is cloth covered.
Interesting that you mentioned the resistors. There are a mix of dogbones and newer carbon resistors. I will check them but there is also an 82ohm wirewound resistor that connects the CT of the power transformer to chassis ground. I believe originally it was the piece circled in yellow but at some point in the past was replaced. I do measure 82 ohms between the CT and chassis so there is a resistor in the circuit but I haven't located it yet. I wanted to be sure its not just a 1/4 watt one. Its gotta be there.
[Image: https://www.dropbox.com/s/yyk74ejiavhlqp....jpg?raw=1]
[Image: https://www.dropbox.com/s/n4vxckrofx6p7e....jpg?raw=1]
Yes, just a 6U5 tube. Unfortunately the wiring into the tube socket is the old rubber stuff so It will need resleeving or replacing. Looks like most (but not all) of the rest of the wire is cloth covered.
