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Extenders for Tek 7000 Series Oscilloscopes

Craig Sawyer has made a home brew 7xxx flexible extender a year or so ago. He has uploaded details onto his server, and he says you are welcome to download it.


  • All cables are 3 feet long (or 1 metre)
  • You need two donor plug in's for the support frame, and a card guide at both ends (or one, with a homebrew Al plate to support the other)
  • You need either a scrap 7xxx backplane from which to pillage an edge connector, or buy one from Farnell (check archives under my name for the part number)
  • There are circuit board layouts in various formats. Check the scaling before using - the track spacing is supposed to be 0.1“
  • Screened cable is RG174
  • There are a couple of pics of a real Tek extender for reference

I'm not prepared to answer any deep questions about this - if you are interested in a roll-your-own simply adapt as necessary to make something that works.

And posted on October 23 2004:

The flexible one can be made with a scrap frame, a circuit board, some ribbon cable, four lengths of heavy wire an six coaxes (Tek's ribbon had all of this incorporated in the ribbon itself).

The female end can be either a connector from a scrap 7000-series backplane, or a 0.1 pitch, 40-way double sided edge connector. These are available from Farnell/Newark, part number 965-996.

You pull out the end connector pins and insert a pair of 972-216 location keys.

These make the connector locate perfectly on the end of a 7000-series plug-in.

These are in fact ?McMurdo parts; here is the datasheet if you want to find them elsewhere than Farnell:


There really is shed loads of stuff - and by no means all from me. I can't understand why there is a problem using the search engine on the Yahoo Tekscopes site…


test_equipment/extender_for_tek_7000_series.txt · Last modified: 2014/05/21 13:09 (external edit)
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