5642: Difference between revisions
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It is used in the CRT cathode and post-deflection acceleration supplies in many Tektronix scopes. | It is used in the CRT cathode and post-deflection acceleration supplies in many Tektronix scopes. | ||
In typical CRT circuits, the filament/cathode leads of each 5642 have their own secondary winding | In typical CRT circuits, the filament/cathode leads of each 5642 have their own secondary winding | ||
on the HV transformer. | on the HV transformer, typically a single loop of wire with extra silicone tube insulation. | ||
Tek part number: 154-0051-00, 154-0079-00 | Tek part number: 154-0051-00, 154-0079-00 | ||
| Line 11: | Line 11: | ||
{{BeginSpecs}} | {{BeginSpecs}} | ||
{{Spec|Heater|1.25 V, 200 mA }} | {{Spec|Heater|1.25 V, 200 mA }} | ||
{{Spec|Peak inverse | {{Spec|Peak inverse voltage | 10 kV}} | ||
{{Spec|Peak plate current | 250 μA }} | {{Spec|Peak plate current | 250 μA }} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
Revision as of 05:42, 13 November 2019
The 5642 is a directly-heated high-voltage rectifier tube. It has three flexible lead connections and is intended to be soldered into the circuit. The European type DY70 is very similar (with lower heater current).
It is used in the CRT cathode and post-deflection acceleration supplies in many Tektronix scopes. In typical CRT circuits, the filament/cathode leads of each 5642 have their own secondary winding on the HV transformer, typically a single loop of wire with extra silicone tube insulation.
Tek part number: 154-0051-00, 154-0079-00
Key Specifications
| Heater | 1.25 V, 200 mA |
|---|---|
| Peak inverse voltage | 10 kV |
| Peak plate current | 250 μA |
