:I have an old Crosley battery set. I think it needs 90 and 22.5V for the B supply and I don't know what it needs for the A supply...does anyone know what the A voltage is and does anyone have a schematic for a homemade power supply that would power this thing?
:I have an old Crosley battery set. I think it needs 90 and 22.5V for the B supply and I don't know what it needs for the A supply...does anyone know what the A voltage is and does anyone have a schematic for a homemade power supply that would power this thing?
On my site I have a few schematics and links to other power supplies.
http://Art_Deco_era_radios.tripod.com/main.html On this page is a basic power supply using a "BH" rectifier, but a silicon diode can be substituted.
http://Art_Deco_era_radios.tripod.com/farm.html At the bottom of the page I have a number of links and a few basic designs that with Ohms law, you can calculate for the values that you need. You will have a number of taps that you will not use for that radio, but the supply can be used for other radios.
As for the "A" supply, if you use 201A series tubes, an old computer power transformer of the non-switching design will work, for a 3 volt supply, you will need to add a voltage regulator to bring it down to 3 volts.
:According to the schematic, this set has three tubes, all 01A or X99 which are 5 volt heater types, I believe. A 5 volt, 1 amp DC supply will do for the A supply.
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::I have an old Crosley battery set. I think it needs 90 and 22.5V for the B supply and I don't know what it needs for the A supply...does anyone know what the A voltage is and does anyone have a schematic for a homemade power supply that would power this thing?