Rare vintage Marconi MWT KT-66 Grey glass brown base Valve/Vacuum Tube - AVO Tested very strong.  Military markings CV1075.

Tested on a recently calibrated AVO VCM 160 with the following results;       

                         IA      GM
Valve 1:   A1   79.2     6.8                

AVO NOS Specs:  IA = 65.0 GM = 6.2  

No leaks or shorts, solid bases, shiny pins. eBay seller for over 21 years, buy with confidence - see feedback.  Valve will be shipped next day, carefully packaged, tracked and insured.  Please drop a note with any questions.

Shipping happily combined on multiple items.

For overseas purchases, please message for a shipping quote before purchasing.

Don't use your amp as a circuit breaker, buy tested valves!