06-21-2020, 08:39 AM
Chances are slim that you will find a replacement coil so you will have to either find the break and repair it or rewind the section that has the break. When handling the coil be aware that the BC coil is on the same form.
We'll have to leave the B+ where it is. Maybe someone else has a suggestion to lower it slightly and what effect it has if left where it is.
Resistor 34 is fine as long as the resistance is what the schematic calls for.
The noise on BC band is from outside sources, mostly from small power supplies like wall warts, modems, TVs, computers, florescent lights, etc. All these devices are transmitting noise to your radio antenna and some is canceled by the circuitry, some gets through. You'll find many discussions here on this topic.
You'll need an rf signal generator to do an alignment properly but you can do it by ear by listening to a distant station and tweek the IF coils slightly one at a time for the loudest and clearest volume.
Right now focus on the SW coil. Like Terry suggested, find out where the break is, inspect the windings for the break in the wire, then figure out how to fix it.
Rod
We'll have to leave the B+ where it is. Maybe someone else has a suggestion to lower it slightly and what effect it has if left where it is.
Resistor 34 is fine as long as the resistance is what the schematic calls for.
The noise on BC band is from outside sources, mostly from small power supplies like wall warts, modems, TVs, computers, florescent lights, etc. All these devices are transmitting noise to your radio antenna and some is canceled by the circuitry, some gets through. You'll find many discussions here on this topic.
You'll need an rf signal generator to do an alignment properly but you can do it by ear by listening to a distant station and tweek the IF coils slightly one at a time for the loudest and clearest volume.
Right now focus on the SW coil. Like Terry suggested, find out where the break is, inspect the windings for the break in the wire, then figure out how to fix it.
Rod
