Find many great new & used options and get the best deals for Tube Tester Precision Series 912 at the best online prices at eBay!A DYNAMIC TUBE TESTER employing an exclusive PRECISION engineered circuit, which in one operation, effectively tests all radio receiving tubes for both. MUTUAL Compiled test data. PDF Format. SCHEMATICS. 614 & 614 · 620 · 654. Precision 910, 915 920, 954. MANUALS. General Operating Instructions PDF Format. Manual for the Precision Series 910, 912 and 915 Dynamic Electronometers (tube testers). Compliments of Hugo Sneyers, ON6HN. Electronamic Tube Tester / Dynamic Equipment Precision Apparatus Co. Notes; 9 tube sockets, one VU meter, manual voltage adjustment. Same as Series 920, TUBE TESTING INSTRUCTIONS. FOR PRECISION SERIES 910-912-914-915-920-922-954 a) Refer to tube tube test roller chart for the tube number required and set. Download PRECISION APPARATUS CO. SERIES 910, 912 AND 915 DYNAMIC ELECTRONOMETERS -TUBE TESTERS service manual & repair info for electronics experts.