Add to Cart Quick view EF Johnson Vintage Tube 250-39 T-R Switch Rated 4 KW P.E.P. in Excellent Condition #6 EF Johnson MSRP: Now: $74.99 Was: This Classic EF Johnson Vintage Tube, 250-39 T-R Switch, is in Excellent Condition. I have not used this switch but I powered it up with no problem and the tubes light up as it should. This one has had a switch added on top so you can turn it off... MSRP: Now: $74.99 Was: Add to Cart Quick view Qty in Cart: 0 Quantity: Decrease Quantity: Increase Quantity: Price: MSRP: Now: $74.99 Was: Subtotal: Add to Cart