DIY Tube Valve base B4 Display and testing Board Assembled
This unit is soldered, only assembly is to fit the stand offs ( Supplied)
This is for ONE display base. The display in the picture is for ONE base kit, no tube valves are supplied. See my other listing for two bases and tubes for amplifier protection.
This is a B4 Valve tube base, designed to display B4 , four pin valves with a centre hole in the valve base. It can also be used for low voltage experimentation and testing of B4 tubes. For testing purposes and experimenting the LED can be left off the board.
A resistor is supplied for 6-12 volt operation, you can substitute for a link and use on 3 volts. The LED provided is a blue LED any colour could be fitted.
Don’t throw those duff tubes away display them as works of art!
DUE TO SAFETY NOT RECOMMENDED FOR HIGH VOLTAGE OPERATION.