JJ/Tesla 7027A Matched Quad
7027A JJ is a great choice on Ampegs and other amps that calls for 7027 type.
7027A JJ is built with sturdiness expected of the JJ power tubes, and at a fraction of the cost of NOS tubes.
7027A is close to 6L6, but not pin to pin compatible. Use only where 7027A tube is called for. Price is for a matched quad (4 tubes) of JJ 7027A