Description

First things first: I say again, these 5755 tubes can **NOT** be substituted *directly* for applications designed for the 12AX7. The pin-out design is different, and requires either an adapter, or rewiring of the tube socket. These are NEW J.A.N. qualified 5755 twin triode vacuum tubes. Great low-level preamp valve. **Black** plate construction. The Western Electric 420A was the prototype for the 5755. The 5755 is similar to the popular 12AX7, but with a *different* pin-out, so obviously they are NOT directly interchangeable. These were made by Raytheon in their Quincy, MA. factory, for the U.S. military, and I acquired them directly from the U.S. government. Guaranteed to be New-old-stock, in pristine condition, in original factory, military style boxes. Combine with other items that I have listed at this time, and save on postage. Price is for EACH tube, so get as many as you need . Thanks for your interest! **International** orders require a $3.00 handling charge per SHIPMENT, in addition to postage fees. International buyers should wait for for an invoice before sending payment, or inquire about shipping costs. When making an inquiry about International shipping costs, please tell me **HOW MANY** tubes you wish to purchase. Thank you.