Powering Tube Radios with Batteries, by Brian H.
DISCLAIMER: USE THE INFORMATION PRESENTED HEREIN AT YOUR OWN RISK. HIGH VOLTAGE DIRECT CURRENT, SUCH AS DESCRIBED BELOW, CAN BE LETHAL. IN ADDITION, EVEN SMALL GEL-CELL BATTERIES CAN PRODUCE HIGH CURRENTS WHEN SHORT-CIRCUITED AND QUICKLY MELT WIRE, DESTROY COMPONENTS, AND START FIRES. IF YOU ARE NOT FAMILIAR WITH ELECTRICITY, THEN ASK SOMEONE QUALIFIED TO CHECK YOUR WORK BEFORE ENERGIZING ANY OF THE CIRCUITRY DESCRIBED. Older vacuum-tube radios are popular in the prepper world (and rightly so) for their resistance to EMP damage. One useful fact about them that is often unrealized is that many of them can be powered by …