Add to Cart Quick view Eimac 4CX-350A JAN-8321 Power Amplifier Tetrode Tube New in Box! Eimac MSRP: Now: $299.99 Was: This Eimac 4CX-350A JAN-8321 Power Amplifier Tetrode Tube, is New in the Box! The Box indicates 2002 Date Codes. If you need this tube this is a new tube at a used tube price! I have only 4 of them left at the time of this ad. The Eimac... MSRP: Now: $299.99 Was: Add to Cart Quick view Qty in Cart: 0 Quantity: Decrease Quantity: Increase Quantity: Price: MSRP: Now: $299.99 Was: Subtotal: Add to Cart