261: Difference between revisions

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-The Tektronix 261 is a switch for 50-ohm coaxial cables.  It has eight independent SPDT
+{{Instrument Sidebar
-relays.  All 24 connectors are [[GR-874]].  Each relay has a coil that
+|manufacturer=Tektronix
-operates on 10mA DC and has a resistance of 160 ohms.
+|model=261
+|class=Multiplexer
+|series=
+|summary=switch for 50 Ω coaxial cables
+|image=Tek 262 catalog.jpg
+|caption=Tek 262 catalog image
+|introduced=1964
+|discontinued=(?)
+|designers=
+|manuals=
+* [[Media:070-423.pdf|Tektronix 261 Manual]] (PDF)
+}}
+The '''Tektronix 261''' is a switch for 50 Ω coaxial cables with eight independent SPDT relays.  Signal connections are through 24 [[GR-874 connector]]s.
-* [http://w140.com/tek_261.pdf Tektronix 261 Manual (PDF)]
+Each relay has a coil that operates on 10 mA (max. 35 mA) and has a resistance of 160 Ω. There are no internal catch diodes.
+The relay coil contacts are brought out to the rear panel, to be controlled by a [[262 | model 262 "programmer"]] or custom circuitry.
+{{MissingSpecs}}
-[[Category:Accessories]]
+==Pictures==
+<gallery>
+Tek 261 1.jpg
+Tek 261 2.jpg
+Tek 261 3.jpg
+Tek 261 4.jpg
+Tek 261 5.jpg
+Tek 261 6.jpg
+Tek 261 7.jpg
+Tek 261 switch.jpg
+Tek 261 assembly.jpg
+Tek 261 coax switch internal.jpg|Internal view of one switch.
+</gallery>
-[[Category:Specifications needed]]
+[[Category:Switches and multiplexers]]
-[[Category:Image needed]]
-[[Category:Introduced in 1964]]