10-12-2024, 11:07 AM
A belated thank you for the many useful suggestions.
I have returned to this project after a few medical distractions, and have started soldering the connections. I teach at a small engineering college, Maine Maritime Academy, and after describing this project we concluded students in the campus Radio Club may find it interesting. Consequently I'm back at it. I will greatly appreciate any additional assistance regarding the following.
I suspect using the single 5V filament supply on the new power transformer on both the UX-171-A and UX-80 may not work well as it is also part of the output circuit. This is an uneducated guess on my part as I don't understand tge circuit well, but suspect 2 5V power transformer outputs were used on the original transformer to separate the UX-171-A filament circuit from the UX-280 filament circuit. I have a 5V 10A DC power supply that I think might be a good substitute.
I am also not certain about the audio section interstage transformer connections. The P-T156 transformer has blue and red wires on one side which I assume are the input. These should connect to the UX-226 plate and the #7 connector on the terminal strip. The 2 green and single black wires from the other side have me puzzled. I know black is the center tap, but where are the 2 green wires to be connected?
I've attached photos of the top and bottom chasis plate.
Thank you, tna
I have returned to this project after a few medical distractions, and have started soldering the connections. I teach at a small engineering college, Maine Maritime Academy, and after describing this project we concluded students in the campus Radio Club may find it interesting. Consequently I'm back at it. I will greatly appreciate any additional assistance regarding the following.
I suspect using the single 5V filament supply on the new power transformer on both the UX-171-A and UX-80 may not work well as it is also part of the output circuit. This is an uneducated guess on my part as I don't understand tge circuit well, but suspect 2 5V power transformer outputs were used on the original transformer to separate the UX-171-A filament circuit from the UX-280 filament circuit. I have a 5V 10A DC power supply that I think might be a good substitute.
I am also not certain about the audio section interstage transformer connections. The P-T156 transformer has blue and red wires on one side which I assume are the input. These should connect to the UX-226 plate and the #7 connector on the terminal strip. The 2 green and single black wires from the other side have me puzzled. I know black is the center tap, but where are the 2 green wires to be connected?
I've attached photos of the top and bottom chasis plate.
Thank you, tna