Vacuum Tube - 6J6A / ECC91, Dual Triode, Medium MU
New-Old-Stock (NOS) tube. The 6J6 is a twin triode in the 7 pin miniature construction. It can be operated in parallel or push-pull. With the grids in a push-pull arrangement and the plates in parallel, the tube is particularly adaptable for service as a mixer at frequencies as high as 600 megacycles.