For Sale: TEK 485 Oscilloscope

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Clark L. Stewart

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Jul 20, 2026, 11:01:44 AM (6 days ago) Jul 20
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I have for sale a Tektronix 485 Oscilloscope. It is a better-than-entry-level dual trace scope. It is good up to 350MHz (50 ohm input) and 250MHz (1 MΩ input), making it usable for most amateur radio work. Like all TEK scopes of this era it is built like a tank, with first quality components. It has some nice added features, too: like the ability to use active TEK probes. For most people, this is the only scope they will need.

It features selectable input impedances, a dual timebase, and horizontal sweep rates down to 1 ns/div.  It runs off 115 VAC and weighs 20.5 pounds making it very portable.  It has a convenient carrying handle that doubles as an adjustable tilt-bail stand.

The photo below was taken this morning.  The sign wave seen was produced by my finger touching the probe just to show that the display works.

It comes with 2 probes (P6105A and P6106A), pouch for the probes, and AC cord. 




Here is the link to a video showing how to utilize the delayed time base of this scope.

https://www.youtube.com/watch?v=J-7MycqHPOs

The image below was taken from that video showing a TEK 485 scope displaying two traces while zooming in on the highlighted section of the upper trace with the delayed time base.




This is a stock photo of the Tektronix 485 Oscilloscope to show the entire package:




I'm asking $400 OBO and can bring it with me to the ARRL Convention in Sutton, WV, on Saturday if anyone is interested.


73, Clark, W8TN


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