Test 12-Pin Compactron, 9-Pin Novar and Magnoval Tubes. Featured is a high-quality hand-crafted set of 3 test socket adapters for use on any version Hickok TV-7 tube tester. These adapters plug into the octal socket on the tube tester for testing a large list of 12-pin Compactron, 9-pin Novar and 9-pin Magnoval tubes.
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