11-03-2013, 05:28 PM
Howdy:
I switched to a VTVM. Voltages did drop a bit.
I also found 2 resistors that connect to the eletrolytics to be off. Now im reading about 20/25 volts over what the schematic says on the b+. AC rectifer voltage still about 50v over whats listed. Filament voltage is 6.7 instead of 6.2. Radio plays nice, ran over 6 hours, nothing got too warm . I did notice the speaker is a replacement. The schematic says the field coil is 2125 ohms. I'm reading 1080 ohms on the replacement. Maybe that effects the voltage as well as higher line voltage.
Anyway, my AC power here is running 123V. I want to bring that down to 115V.
I saw on here that some use a voltage dropping resistor and others use a CL-80 Thermister.
I might get both and see what works best. I love to tinker on this thing.
To drop the 123 to 115 will require a 22 ohm resistor, according to a dropping resistor calaculator on line. I'm terrible at math.
Will get a Vishay/Dale wirewound chassis mount.
Power is 45 Watts according to schematic, so @ 123V it suppose to draw .36A according to ohms law. What watttage resistor would work best. Calaculator program said 2.66W minimum...
Thanks
Buzz
I switched to a VTVM. Voltages did drop a bit.
I also found 2 resistors that connect to the eletrolytics to be off. Now im reading about 20/25 volts over what the schematic says on the b+. AC rectifer voltage still about 50v over whats listed. Filament voltage is 6.7 instead of 6.2. Radio plays nice, ran over 6 hours, nothing got too warm . I did notice the speaker is a replacement. The schematic says the field coil is 2125 ohms. I'm reading 1080 ohms on the replacement. Maybe that effects the voltage as well as higher line voltage.
Anyway, my AC power here is running 123V. I want to bring that down to 115V.
I saw on here that some use a voltage dropping resistor and others use a CL-80 Thermister.
I might get both and see what works best. I love to tinker on this thing.
To drop the 123 to 115 will require a 22 ohm resistor, according to a dropping resistor calaculator on line. I'm terrible at math.
Will get a Vishay/Dale wirewound chassis mount.
Power is 45 Watts according to schematic, so @ 123V it suppose to draw .36A according to ohms law. What watttage resistor would work best. Calaculator program said 2.66W minimum...
Thanks
Buzz
