Here is a the very rare and not too often seen Sofia Tube Curve Tracer? Tester. If you know you know what this incredible unit is about.. This is considered one of the best ever if not the best ever modern all in one tester /curve tracer made. If you love tubes as I do and collect testing gear., this is one of the rarest piece to find.. Read JAC's article on tube testers and you'll see what this unit is all about. This is not for the tube novice. Its designed for true engineers and collectors that understand electronics and how to interpret the true tube data. If you are that guy This is the better than an Amplitrex by far. I have a dedicated computer that comes with it . Its set up to run this tester and has the manual built in. Its fairly easy to set up and get running. Ill say this again , You need to know about tubes and electronics to really get the best out of this unit.. I looked for 10 years before finding this unit for my collection. Less than 200 ever made,. and the company that made them still services it if ever needed. The unit works great and I can share video of me using it last night testing an EL 34. This a a very rare opportunity to own one of these incredible units .Might do international shipping as long as the buyer pays all shipping cost and fees. All sales are finals. No returns!

Sofia Vacumm Tube Curve Tracer/Tester By Audiomatica