25Z6 Rectifier to Solid State Conversion?

[Electronic M]

The 25Z6 was usually used in series string heater sets so you can roll your own by downloading the 25Z6 datasheet. Use the heater voltage and current in this equation R=voltage/current to calculate the resistor you need to replace the heater with and multiply the voltage times current to get the wattage that resistor needs to be (it's wise to get a resistor twice that wattage so it doesn't run hot.

Once that's done wire a 1n4007 in place of each diode on the schematic symbol for the tube. You can take the base of a dud tube and install the diodes and resistor in it.
Most commercial replacements are this plus a bunch of bucks to pay someone else to build it.... I'm cheap and usually have all the parts I need to build one so I usually roll my own.