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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.


Quick News.............

17/01/22 - PDVS2mini's are out of stock. I am currently evaluating my stock of parts for the next batch and whether I will be affected by the semiconductor crisis. Please use the NOTIFY ME link on the PDVS2mini page to register your email address so you will be notified automatically as soon as stock is available.

 Donate to IanJohnston.com using PayPal here or pledge a donation via Patreon here.

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

Video Blog #093 - Agilent 3649A PSU Repair - Revisited!

I had previously repaired this power supply a year ago and it's been great.....till now!
Date: 30/04/22

Video Blog #088 - Rigol DG1022Z Arbitary Waveform Function Generator Repair

I was contacted by TDV Electronics from here in the UK who donated a low hours but faulty DG1022Z. They had accidentally connected one of the outputs to +28Vdc and knackered the output.
Date: 01/04/22

Project #026 - DMM Continuity Tester

DMM reviews by 'clicking' the probes together as fast as you can to see if you can beat the 'beep' into submission....."there must be a better way than that".
Date: 31/03/22

Video Blog #086, #087, #089, #090 & #91 - Keithley 2001 7.5 digit Multimeter Repair - Part 1, 2, 3, 4, 5 & 6

I picked up a Keithley 2001 7.5 digit Multimeter quite cheap and was hoping for an in-depth repair.....it didn't disappoint!
Date: 11/03/22

Video Blog #084 & #085 - Another HP 34401A 6.5 digit Multimeter Repair - Part 1 & 2

After acquiring yet another HP 34401A 6.5 digit multimeter I begin repairs. One main symptom, but many faults!
Date: 20/02/22

Video Blog #081, #082 & #083 - HP 34401A 6.5 digit Multimeter Repair - Part 1, 2 & 3

In these videos I repair of an HP 34401A 6.5 digit Multimeter including detailing how to remove the front panel and troubleshooting the fault(s).
Date: 27/11/21

Video Blog #079 & #080 - Gtek 7128 Eprom Programmer 240Vac Conversion & Analysis - Part 1 & 2

In these two videos I convert an old school Gtek 7128 Eprom Programmer and along the way look into how the circuit actually works and test out the DOS software.
Date: 26/08/21