The internet’s place to go for surplus test equipment, slide rules, and assorted oddities!

Latest Inventory Clearance!

June 14, 2025

We’re making great progress on clearing out space, which means we’ve got an entire new list of items that have been posted to the On Sale page:

  • Tektronix oscilloscopes!
  • Lots of RF components (attenuators, amplifiers, band pass filters, directional couplers, and such)
  • ALL of our remaining handheld test equipment (DMMs, light meters, Scope Meters, etc)
  • HP GPIB and other data cables

Items on the the On Sale page have been reduced in price to help offset shipping costs.  This batch will be removed at the end of July, get it while you can because it disappears forever when it gets removed from our site!

The End is Near…

June 3, 2025

…for most of our equipment and parts.

We’ve been slowly reducing our inventory of equipment, assemblies, tools, and parts.  Very soon we will only be focussing on slide rules and nixie tubes.

So if you are interested in something we have, particularly those items on the On Sale page, the time remaining to acquire those items is growing shorter.

Leaving Inventory – Mid June

May 30, 2025

Our next batch of items that are leaving our inventory and have been reduced in price are now on the On Sale page:

  • RF Components
  • Rare Tektronix plugins
  • Our last remaining Logic Analyzer
  • Philips Oscilloscope
  • Power Supplies
  • Counters
  • Parts

Once these parts/equipment leave our inventory they are gone forever, snap them up before they shuffle loose the electric coil!

Tektronix & HP Parts Have a New Home!

May 20, 2025

Sphere Research previously held a large stock of extremely rare Tektronix and HP repair parts, and as we are gradually liquidating the company we no longer have the capacity to inventory and list all of those components.

Thankfully, the universe provided us a Tom Norman (proper noun: A gentleman of extensive engineering knowledge, and affinity for Tek & HP equipment).  He has taken over our entire stock of Tek & HP parts, and is doing all the work of inventorying and listing these rare components for sale to the many people who want to keep their older and highly sought after equipment running for years to come.

Tom Norman’s website can be found at TekandHPparts.com, and we have a placed a permanent link to his site under our “Stuff” listing as “Tek & HP Parts”.

Not all of the inventory is listed yet, so if there’s something you are looking for that can’t be found on his website, don’t hesitate to contact him at tom@tekandhpparts.com.

Leaving Inventory – General Radio, Power Supplies, RF Components

May 14, 2025

We’ve got a wide variety of new items that have been moved to our On Sale page, including some of the following:

  • All remaining General Radio equipment
  • Handheld test equipment
  • Xantrex and Sorensen power supplies
  • A wide variety of RF components
  • Large and bulky things that are mysterious!

All prices have been reduced to offset shipping costs.  These items will be leaving our inventory at the end of May.

IMPORTANT: There is a risk of an upcoming postal strike in Canada, so don’t tarry in ordering!