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Donate to IanJohnston.com using PayPal here, or pledge a donation via Patreon here.
I like creating electronics related YouTube videos. I mostly buy faulty gear from Ebay and make a repair video of it,
but it's expensive and so with your help maybe I can continue to do so.
If you have any faulty test gear you don't want or going cheap then please contact me. Your support would be greatly appreciated.

Latest Articles.............

Video Blog 121 - Racal 835 Universal Counter Repair

This 835 has been sitting for many years and is missing parts! So, I set about trying to get it up & running.
Date: 01/12/23

Video Blog 119 - Racal-Dana 9900 Universal Counter Timer Repair

This 9900 Universal Counter Timer has a broken IC, not faulty......just broken!
Date: 09/11/23

Video Blog 117 & 118 - HP 3245A Universal Source Repair, Mods & Upgrades - Part 2 & 3

2nd and 3rd videos: Replace the faulty VFD, fit a new front panel, add some banana sockets and make a huge observational error!
Date: 07/11/23

Video Blog 116 - Keithley 2306 Dual Channel Battery Charger Simulator Repair - Part 2

Further repairs and refurbishment to the 2306, and initial testing.
Date: 15/09/23

Video Blog 115 - Keithley 2306 Dual Channel Battery Charger Simulator Repair - Part 1

This Keithley 2306 has a very typical fault for the series, but with the added bonus of a delaminated 6-layer circuit board.
Date: 08/09/23

Video Blog 114 - Time Electronics 2003S DC Voltage Calibrator Repair & Refurb

Dating from around 1975, a 10V voltage Calibrator from Time Electronics in the UK. I couldn't resist a repair and refurbishment project.
Date: 02/09/23

The Amp Hour #643 - Calibration & Repair with Ian Johnston

I was lucky enough to appear on The Amp Hour podcast with Dave Jones (EEVBlog).
Date: 22/08/23