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EICO 635 Tube Tester





Select or type a tube name to get specific settings for the Eico 635 Tube Tester.

Sort columns values by clicking their titles - A → Z or Z → A

ID Tube 1 2 3 4 Socket Short Test
2251 12J7 A 8 F 11 D 2-4
2252 12J8 A 2 F 1 A 2-3
2253 12J8# A 7 F 8 A -
2254 12J8# A 7 F 9 A -
2255 12JB6 A 3 F 2 K 2-1
2256 12JN6 A 2 F 11 I 2-8
2257 12JN8 A 3 F 1 A -
2258 12JN8 A 8 F 9 A 2-7
2259 12JS6 A 2 F 5 I 2-3
2260 12JT6 A 3 F 2 K 2-7
2261 12JZ8 A 6 F 9 I 2-8
2262 12JZ8 A 11 F 10 I -
2263 12K5 A 1 F 6 L 2-2
2264 12K7 A 8 F 11 D 2-4
2265 12K8 A 8 F 5 D 2-4
2266 12KL8 A 3 F 2 A 2-6
2267 12KL8# C 3 F 8 A -
2268 12L6 A 8 F 5 D 2-4
2269 12MD8 A 7 F 6 K -
2270 12MD8 A 7 F 8 K -
2271 12MD8 A 7 F 9 K -
2272 12Q7 A 8 F 11 D -
2273 12Q7# C 8 F 4 D -
2274 12Q7# C 8 F 5 D -
2275 12R5 A 1 F 2 L 2-6
Important
Note A: Set all switches before inserting the tube in its socket.
Note B: First test for shorts before making quality test.
Note C: If "shorts-grid leakage" indicator glows when tube is inserted in its proper socket do not test for quality. Damage to the circuit of the tube tester may occur or you may damage the tube.
Note D: Tubes listed with a "#" next to it is read on diodes OK scale.

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Last modified: Jun 5, 2026 20:40
Cape Old Radio - Since Nov, 1996
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