Valve / Tube Tester Superior Instruments TD-55 $241.31 USD Sold on: 2012-Oct-27 Marketplace: eBay 11 Treasure 0 Trash 100% Detail: Superior Instruments TD-55 Valve / Tube Tester Working order. Requires 110/120V adaptor if using on UK mains. Dating from the mid 1950s, this tester is offered with an original tube chart as well as a... More Relevance Historical Items
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