5642: Difference between revisions

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-The 5642 is a directly-heated high-voltage rectifier tube.  It is used in the CRT cathode and
+[[File:Apollo 5642 tube.jpg|thumb|300px|right|Apollo 5642 Vacuum Tube]]
-post-deflection acceleration supplies in many Tektronix scopes.  In typical
+{{Vacuum Tube
-CRT circuits, the filament/cathode leads of each 5642 has its own secondary winding
+|Type=Diode
-on the HV transformer.
+|Number=5642
+|EuroNumber=DY70
+|RussianNumber=
+|Part_nos=154-0051-00, 154-0079-00
+|Description=directly-heated high-voltage rectifier
+|Used_in=310;310A;316;317;360;453;502;502A;503;504;506;513;515;516;524;529;RM529;533;533A;535;536;543;543A;543B;545;545A;545B;547;551;555;556;560;561;561A;561S;564;567;570;575;581;581A;585;585A;647;647A;
+|Designers=
+}}.  It has three flexible lead connections and is intended to be soldered into the circuit.
-[http://w140.com/5642.pdf 5642 datasheet]
+The European type DY70 is very similar (with lower heater current, 140 mA).
+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.
+{{BeginSpecs}}
+{{Spec|Heater|1.25 V, 200 mA }}
+{{Spec|Peak inverse voltage | 10 kV}}
+{{Spec|Peak plate current | 5 mA }}
+{{Spec|DC plate current | 250 μA }}
+{{Spec|Min. supply frequency | 5 kHz}}
+{{Spec|Forward voltage drop | 40 V @ 4 mA}}
+{{EndSpecs}}
+==Links==
+* [[Media:RCA_5642.pdf|RCA 5642 datasheet]]
+* [[tube:5642|5642]] / [[tube:dy70|DY70]] @ 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>
+==Used in==
+{{Part usage}}
 [[Category:Diode tubes]]