10-16-2007, 11:55 AM
Dave, thanks for the advice (and you, too, cwtravis.) I'll move some wires around and see what I can make happen.
The previous "restorer" had installed new filter capacitors, cutting the old cans out of the circuit. He basically hung the new filters, some other caps, and a couple of resistors in mid-air, connected with stiff bus wire and some sleeving, all in a bundle in the vicinity of the first AF tube. The result was a dreadful hum that increased at each end of the volume control and came to a minimum when the volume was at the mid-point.
Unfortunately, all this is under the push-button coils, so the photos I've seen don't show the wires very well. I restuffed the capacitor cans and then had to make up my own routing for most of the power supply wires.
All the other wires that I replaced I soldered the new wire to one end of the old and then pulled the new wire through the exact routing of the old.
I did make one mistake in not noting the exact routing of the B+ wire to the 2nd IF transformer. That wire weaves over and under several of the wires going to the IF tube on its way to a B+ terminal but I forgot to note exactly how. That area might be a good one to start with moving wires around.
The previous "restorer" had installed new filter capacitors, cutting the old cans out of the circuit. He basically hung the new filters, some other caps, and a couple of resistors in mid-air, connected with stiff bus wire and some sleeving, all in a bundle in the vicinity of the first AF tube. The result was a dreadful hum that increased at each end of the volume control and came to a minimum when the volume was at the mid-point.
Unfortunately, all this is under the push-button coils, so the photos I've seen don't show the wires very well. I restuffed the capacitor cans and then had to make up my own routing for most of the power supply wires.
All the other wires that I replaced I soldered the new wire to one end of the old and then pulled the new wire through the exact routing of the old.
I did make one mistake in not noting the exact routing of the B+ wire to the 2nd IF transformer. That wire weaves over and under several of the wires going to the IF tube on its way to a B+ terminal but I forgot to note exactly how. That area might be a good one to start with moving wires around.
John Honeycutt
