Qty 1 Vacuum Tube Marconi STV280/40 Voltage Regulator Stabilovolt Valve - Not Tested

In very nice condition with no visible signs of damage to glass envelope or socket base or signs of overheating, but selling as used since history of tube is not known and I don't have the ability to test it. May show some signs of handling / shelf wear.

We have many tubes available. If you are interested in something specific, please inquire.

WE WILL COMBINE SHIPPING ON MULTIPLE ITEM ORDERS. When purchasing multiple items, please let us know before making payment so that we can adjust the shipping amount on the invoice.