01-23-2009, 09:49 AM
Hi Oscar,
Looks to me like a 20 to 25 watt power resistor would work. The schematic shows the coil at 1125 ohms. A 1200 to 1350 ohm would work nice. Just lift the wires that go to the field coil and insert the resistor in an area that is away from any other components. Just beware it will get hot. If you get a slight hum you can increase the size of your filter capacitors by a little to remove the hum. You can still use the same audio transformer from your old speaker.
Just for grins you might peel all of the paper off of the coil and see if you have a bad connection where wires are tied together. You've got nothing to lose.
Terry
Looks to me like a 20 to 25 watt power resistor would work. The schematic shows the coil at 1125 ohms. A 1200 to 1350 ohm would work nice. Just lift the wires that go to the field coil and insert the resistor in an area that is away from any other components. Just beware it will get hot. If you get a slight hum you can increase the size of your filter capacitors by a little to remove the hum. You can still use the same audio transformer from your old speaker.
Just for grins you might peel all of the paper off of the coil and see if you have a bad connection where wires are tied together. You've got nothing to lose.
Terry
