12-19-2024, 09:37 AM
Hi Perry and welcome to the Phorum. That is a very nice radio which will have a nice sound when working. The amplifier stage likely puts out at least 5 watts at rather low(for the time) distortion.
Almost all of the parts needed for your radio are available. My rough guess is that before the 80 Rectifier tube broke, that moisture got between the tube and socket, and carbon arcing occurred.
+1 on what Radio Roslyn said. Obviously, do not power up the radio. The 80 rectifier tube and the 4 pin socket are easily available form eBay or Antique Electronic Supply. The 80 is the older version of the 5Y3. The 5Y3 requires an "Octal" socket. You can replace the 80 and 5 pin socket with the 5Y3 and octal socket, but this is not necessary.
At a bare minimum, you must replace the 80 and its socket and Capacitors 81, 83, 85, 76 and 79 before attempting to power up. This is both for the safety of the radio and, in the case of capacitor 85, your safety. If cap 85 leaks, you can receive a dangerous or deadly shock. In the case of caps 81 and 83, the electrolytic filter caps, these caps either short, causing rectifier and transformer burnout, or open, causing extreme hum. However, all capacitors are suspect due to their age and that they are foil / paper / wax construction. Newer capacitors are mylar or other more permanent materials.
How much of this that you do yourself depends upon your knowledge of electronics and your mechanical and soldering skills. We are always happy to provide any help that we can!
Almost all of the parts needed for your radio are available. My rough guess is that before the 80 Rectifier tube broke, that moisture got between the tube and socket, and carbon arcing occurred.
+1 on what Radio Roslyn said. Obviously, do not power up the radio. The 80 rectifier tube and the 4 pin socket are easily available form eBay or Antique Electronic Supply. The 80 is the older version of the 5Y3. The 5Y3 requires an "Octal" socket. You can replace the 80 and 5 pin socket with the 5Y3 and octal socket, but this is not necessary.
At a bare minimum, you must replace the 80 and its socket and Capacitors 81, 83, 85, 76 and 79 before attempting to power up. This is both for the safety of the radio and, in the case of capacitor 85, your safety. If cap 85 leaks, you can receive a dangerous or deadly shock. In the case of caps 81 and 83, the electrolytic filter caps, these caps either short, causing rectifier and transformer burnout, or open, causing extreme hum. However, all capacitors are suspect due to their age and that they are foil / paper / wax construction. Newer capacitors are mylar or other more permanent materials.
How much of this that you do yourself depends upon your knowledge of electronics and your mechanical and soldering skills. We are always happy to provide any help that we can!
"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
"Let us begin to do good"- St. Francis
Best Regards,
MrFixr55
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