Details
A home-made one-valve wireless receiver
with a Mullard DE3 valve, twin plate coils, double door compartment and carrying handle, circa 1923 -7½in. (19cm) wide; an R2 valve with variable current control base (valve open circut); a large open fixed crystal detector; a trio loose coupling coil unit; and other crystals and mountings including a NAA Gelena tin with contents (qty)
with a Mullard DE3 valve, twin plate coils, double door compartment and carrying handle, circa 1923 -7½in. (19cm) wide; an R2 valve with variable current control base (valve open circut); a large open fixed crystal detector; a trio loose coupling coil unit; and other crystals and mountings including a NAA Gelena tin with contents (qty)