Someone from my neighbourhood asked to maintain his table radio. A pretty begin-70's transistor model It works, but has your typical issues: bad contacts, cracking controls.I went to the local electro shop to get a new can of contact cleaner, op...
My first trace rot repair on an original Xbox was a big moment for me being new to repair . I had been told by fellow Xbox enthusiasts that this was the probable cause of my issue which was random switching off and powering on with eject . I proved l...
1960 HH Scott Multiplex FM Tuner. Crystal clear broadcast, and the Multiplex system just makes the sound 3D.. She was pretty dirty when I got her, but in relatively good shape. I cleaned up the linside and after checking paower across the syste...
Repairing a Midi Synth
In this post, I take on the challenge of repairing a Midi synthesizer which was sitting in a co-worker's junk bin for a few years. I was talking to him about electronics at some point and he mentioned that he had this thing he...
Restoration and Repair is a Project14 theme I've been looking forward to. Rarely is there nothing in need of a bit of a fix, which often means saving some money, preventing something from going into landfill and learning more about a given item ...
In part 1 we had a good look at the power supply internals, figured out the schematic and the functional blocks of the circuit. This gives us a good starting point to troubleshoot the problem, in search for an (hopefully) easy fix. Let's start...
“I’ll just put it there for now, then I will fix it next week”…
I don’t know you, but I have pronounced those words many times (and I still do, to be honest!). Then, after countless weeks, one day you open the ...
This is the brief final element of repairing the relay and is an extension of the test program to use the more automated side of the Omicron software. This blog is really only for someone who may have more of an interest in the use of the Omicron in...
Introduction
In the previous blog I introduced the UBX117 stator earth fault relay and the issues that had been found with a couple that I had previously tested on a site.
Repairing a Generator Stator Earth Fault Relay - Part 1
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Introduction
Pre-calibration accuracy
Calibration
Post-calibration accuracy
Source code
Conclusions
WARNING: DO NOT TRY TO REPLICATE THIS UNLESS YOU ARE WILLING TO TAKE THE RISK OF BREAKING YOUR PSU!
Introduction
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Introduction
As part of the repair and restoration theme for project14, I am taking a look at an obsolete UBX117 protection relay, that was removed during routine testing of a generator protection panel, due to faulty operation. I will go thr...
Hello, my name is Doug and I'm a gadgetaholic, and the gadget in the 2nd picture below really tickles my fancy.
I have not been blogging much this year, but with all the lockdowns in place, I think it is important to stay connected, stay positive, c...
PREFACE:
For 40+ years, I've heard the same thing from wimpy-wrenchers - "They design cars so you can't work on them any more." I even hear this from fellow engineers. Actually, it's very much the opposite for reasons I'll present ...
For Project 14's Restoration and Repair month, I'm going to service a Philips GA-212 Electronic turntable that needs some TLC.
In this post, I'll check the overall health of the electronic circuit: power supply voltage and related signals...
This is a simple wafer maker fix.The unit does not heat up but the relay clicking sound can be heard. So I check the heater filament and the relay. It shows filament is fine but the continuity of the relay output is open even during ON. The board is ...
Good Day,
Side note: This was originally created for the TekScope YAHOO group, http://tech.groups.yahoo.com/group/TekScopes/ back in January 2014.
Tektronix D10/5103N CRT Oscilloscope - Repair notes and pictures
This is a writ...
A stroboscope is a solution that helps you check and set turntable speed.
In the past, when we used incandescent light bulbs, we didn't need a stroboscope.
These lamps would by default flicker 100 or 120 times per second (for 50 or 60 Hz systems...
