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| Builder | Scuola Radio Elettra |
| Model | Not specified |
| Year | 1970 about |
| Tubes | None |
| Power | 110-160 Vca |
| Size | 23x17x8 |
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Detailed view of the inductor wich has been added to the circuitry to avoid auto-oscillations. This tube tester was build by myself about in the '70, it was sold by "Scuola Radio Elettra". More details HERE , with the schematic diagram that explains inside a red squares the modifications required. |
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View of the tube tester during an heather glow check. With this instruments is possible to check some important parameters of the tubes. |
| The picture displays the tube tester with its mesurement indicator, a tester. In the tester scale there is a sector marked as "GOOD" "?" "NO GOOD" wich is useful to verify the tube under test. | ![]() |
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