Specifications

National 811A Vacuum Tube, New Old Stock These are a mix of China manufacture and USSR manufacture. These are new tubes, and were part of the tube collection of an amplifier tech. These were always kept in a good environment, and I have inspected each one. If you are replacing a tube in a radio amplifier, it's a good practice to replace them all with the same brand, as closely matched as possible. No returns on amplifier tubes. Guaranteed not to be DOA, but otherwise, these are not returnable. Ships quickly and safely from Mississippi.

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