OPERATING INSTRUCTIONS FOR MODEL TV-11
Contents
1. OPERATING INSTRUCTIONS FOR MODEL TV 11 TUBE TESTER t Insert the line cord into a 105 125 volt 60 cycle A C line This instrument will not operate on D C power lines 2 Place the power switch in the on position 3 Place the 4 position slide switch located to the left of the levers in the line position 4 By means of the line adjust control adjust the meter to read center scale TO TEST A TUBE FOR QUALITY I Set the filament voltage switch to the correct tube voltage as designated in the chart If no voltage is given the filament volt age switch may be left in any convenient position 4 2 Place the lever number designated in the F column in the F or filament position 3 Place any levers designated in the N column in the N or neutral position Leave these levers in their position during the complete test for the tube Do not move these levers for either the quality or short tests 4 Place the lever designated in the P column in the P or plate position If more than one P position is indicated see instruc tion 6 below 5 Place the load control to the setting designated in the load column of the tube under test If more than one load Position is indicated see instruction 6 below 6 Tubes having more than one listing are multi section tubes and each section is individually tested See that all sections are tested and none are omitted The P and load settings v2. are such tubes Because Note B Reading above 20 is O K of thelr extremely high resistance a reading of Note C Pin 1 is missing 10 or above for these particular types is okay ry IM 2 54 3
3. ary for the various sections The F and N positions do not vary and should not be moved when making quality or short tests 7 For regular tests set the 4 position slide switch located to the left of the levers in the reg position For special tests as indicated by the letter S after the P setting set the 4 position switch to the special position 8 Place all other switches in the K or cathode position 9 Insert the tube into its socket Be extremely careful when inserting sub miniatures These tubes have a red dot on one side and should be placed in the socket so that the dot on the tube corresponds to the dot on the tube socket 10 Read the quality of the tube directly on the meter scale EXAMPLE OF TUBE TEST Tube 117P7 Test 2 Diode Section Tost 1 Pentode Section Leave filament selector at 117 volts 1 Set filament voltage to 17 volts 2 Leave 2 lev r in F position 2 Set 2 lever in F position 3 Set 8 lever in P position 3 Set 4 lever in P position 4 Set load control to 3 4 Set load control to 3 5 Set slide switch to special as indidated by the S after the 5 Set slide switch to regular 8 in the P position f TO TEST FOR SHORTS AND LEAKAGES 1 Place the 4 position slide switch located to the left of the levers in the short position 3 2 Place the leakage slide switch located to the right of the line voltage control in the tube po
4. ch element lever in the P position while listening with the phones Noise will be heard as a pinging sound super imposed over the hum TO TEST A CONDENSER FOR LEAKAGE 1 Insert the line cord into a 105 125 Volt 60 cycle A C line This instrument will not operate on D C power lines 2 Place the power switch in the on position 3 Place the 4 position slide switch located to the left of the levers in the line position 4 Place the leakage slide switch located to the right of the line voltage control in the condenser position 5 By means of a set of test leads connect the condenser under test to the jacks marked Cond i A good condenser will flash only one time More than one flash charging of condenser is caused by leakage of the condenser the flash indicating the rate of leakage A condenser which flashes more than once per second may be regarded as having excessive leakage Do not attempt to test Electrolytic Condensers by this method t is designed for all other types including paper Mica and Ceramics TO TEST PILOT LAMPS 1 Set filament voltage selector to pilot lamp voltage 2 Place the 1 lever in the F position all others in the K position 3 Insert into center of large 7 pin socket E ai IMPORTANT We find many users have over NOTES looked the reference to High Voltage diodes t See Note upper section The 1B3 1X2 IX2A Note A Reading above 10 is O K IY3 2V3 2X2 879 etc
5. sition 3 Place the load control in its completely clockwise 10 position 4 With the exception of the lever switches which are already in the F and N positions as instructed on tube chart place all other levers down to the K position Now place each remaining lever one at a time in the P position observing ne n Be sure to return each lever to the K position before bringing the next one to the P position 5 Note the neon lamp A steady glow indicates a short A single flash may be disregarded as it is caused by the tube capacity A slight glow may be disregarded when testing audio tubes such as 6L6 43 50L6 etc These tubes have a high inherent leakage which in many cases does not affect the operation of the tube No glow is of course preferable but a slight glow is passable A steady glow on any of the elements listed in the filament continuity column does not indicate a shorted tube but does indicate filament continuity TO TEST FOR FILAMENT CONTINUITY i To test for filament continuity proceed as in To Test for Shorts but use either of the levers indicated in the filament continuity column One must be in the P position when the other is in the K position Either may be used The neon will glew if the filament is intact No glow means an open filament TO TEST FOR NOISE To test for noise plug a pair of magnetic phones into the phone jack while the tube is being tested for quality Tap the tube and place sa
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