Nice 70's vintage NOS Mullard EL821 output tubes in the original boxes. EL821 is a pentode output tube that can match well to output transformers designed for EL84 or 6V6 tubes. With adapter to use directly in place of EL84 tubes, an effective way to get British NOS quality without the expense of NOS EL84 tubes. Price is per tube + one adapter.
This item is shipped from Britain, in North America or Asia please allow 2 to 3 weeks for delivery..