eico_model_635_tube_tester_and_tube_data 电路图.pdf

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6、LE NOW! THIS PAGE COPYRIGHT VON WALTHOUR PRODUCTIONS WWW.EVERYTHING4LESSSTORE.COM EICO MODEL 635 TUBE TESTER MANUAL The accompanying GIF files represent the entire operating manual and tube listings for EICO Model #635 tube tester. Manufactured by the EICO Electronic Instrument Company. The manual i

7、s dated 1968. This tester was purchased as a kit Feb. 22, 1972 and to-date has never required any repairs. While possibly not the most accurate of tube testers it is certainly one of the easiest and quickest to use. The 635 generally gives a good indication of tube “go no go” condition, however on occasion, I have had to turn to my Heathkit IT-21 to find internal leakage and shorts that did not show up on the Eico 635. In the past 30 plus years Ive tested literally thousands of tubes with it. Gord