5642: Difference between revisions

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The 5642 is a directly-heated high-voltage rectifier tube.   
[[File:Apollo 5642 tube.jpg|thumb|300px|right|Apollo 5642 tube]]
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).


* filament volatage = 1.25V
It is used in the CRT cathode and post-deflection acceleration supplies in many Tektronix scopes.
* filament current = 200mA
In typical CRT circuits, the filament/cathode leads of each 5642 have their own secondary winding
* peak inverse volrage = 10kV
on the HV transformer.
* peak plate current = 250uA


It is used in the CRT cathode and
Tek part number: 154-0051-00, 154-0079-00
post-deflection acceleration supplies in many Tektronix scopes.
 
In typical CRT circuits,
{{BeginSpecs}}
the filament/cathode leads of each 5642 have their own secondary winding
{{Spec|Heater|1.25 V, 200 mA }}
on the HV transformer.
{{Spec|Peak inverse volrage | 10 kV}}
{{Spec|Peak plate current | 250 μA }}
{{EndSpecs}}


[http://w140.com/5642.pdf 5642 datasheet]
==Links==
* [http://w140.com/5642.pdf RCA 5642 datasheet (PDF)]
* [[tube:5642|5642 @ radiomuseum.org]]


==Pictures==
<gallery>
Tek 516 hvps1.jpg|Three 5642s in a [[516]] HV supply
Tek 547 HVSection-NoCover.jpg | 5642s in a [[547]] HV Supply
Apollo 5642 tube.jpg
Apollo 5642 1.jpg
Apollo 5642 2.jpg
Apollo 5642 3.jpg
Apollo 5642 4.jpg
Apollo 5642 5.jpg
Apollo 5642 6.jpg
Tek-RM35A-HV-Section.jpg | 5642s in a 535/RM35A HV Supply
</gallery>


[[Category:Diode tubes]]
[[Category:Diode tubes]]

Revision as of 09:28, 28 November 2018

Apollo 5642 tube

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.

Tek part number: 154-0051-00, 154-0079-00

Key Specifications

Heater 1.25 V, 200 mA
Peak inverse volrage 10 kV
Peak plate current 250 μA

Links

Pictures