02-06-2009, 05:45 PM
Hooray! I got it fixed. Exray pretty much pinpointed the problem. There was a cold solder joint on the connection between the 6 k resistor, 0.0015 capacitor, and the oscillator coil in the cathode circuit of the 1st detector. I started tapping and pushing on parts in the problem area and I noticed that when I moved the 6k resistor I could make the problem come and go. A little more pushing showed up the loose solder joint. When soldering to the old wiring it's hard to get the solder to stick to the old wiring.
The radio picks up quite well and plays loudly, even on weak stations. It has just a little audio distortion. I wonder if I have the regen control turned up too far? It might be that the distortion is coming from the adjacent station that it is picking up. My favorite station is weak and it's only 40kc away from a powerhouse station whose towers are almost visible from my house. My Philco 89B separates them nicely, but it has all the circuitry to do so, and two extra tubes.
The radio picks up quite well and plays loudly, even on weak stations. It has just a little audio distortion. I wonder if I have the regen control turned up too far? It might be that the distortion is coming from the adjacent station that it is picking up. My favorite station is weak and it's only 40kc away from a powerhouse station whose towers are almost visible from my house. My Philco 89B separates them nicely, but it has all the circuitry to do so, and two extra tubes.
