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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 system, decided to start it up before deciding on recaping. To my amazement, it brought in local stations in my work shop with just the internal antenna. I quickly put a 3' loop antenna on and found a week station and did a ear alignment. Like a bomb goin ...
Restoration & Repair Enter Your Electronics & Design Project for a chance to win an $200 Shopping cart of product! Submit an EntrySubmit an Entry  Back to homepage Project14 Home Monthly Themes Monthly Theme Poll   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 uses for DJ'ing ...
Restoration & Repair Enter Your Electronics & Design Project for a chance to win an $200 Shopping cart of product! Submit an EntrySubmit an Entry  Back to homepage Project14 Home Monthly Themes Monthly Theme Poll   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 by describing ...
Restoration & Repair Enter Your Electronics & Design Project for a chance to win an $200 Shopping cart of product! Submit an EntrySubmit an Entry  Back to homepage Project14 Home Monthly Themes Monthly Theme Poll   “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 cupboard, and it ...
Restoration & Repair Enter Your Electronics & Design Project for a chance to win an $200 Shopping cart of product! Submit an EntrySubmit an Entry  Back to homepage Project14 Home Monthly Themes Monthly Theme Poll   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 injection test se ...
Restoration & Repair Enter Your Electronics & Design Project for a chance to win an $200 Shopping cart of product! Submit an EntrySubmit an Entry  Back to homepage Project14 Home Monthly Themes Monthly Theme Poll   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 ...
Restoration & Repair Enter Your Electronics & Design Project for a chance to win an $200 Shopping cart of product! Submit an EntrySubmit an Entry  Back to homepage Project14 Home Monthly Themes Monthly Theme Poll   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 through the process ...
Restoration & Repair Enter Your Electronics & Design Project for a chance to win an $200 Shopping cart of product! Submit an EntrySubmit an Entry  Back to homepage Project14 Home Monthly Themes Monthly Theme Poll   Hello, my name is Doug and I'm a gadgetaholic, and this gadget (2nd picture) 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, communicate, find ways to ...
Restoration & Repair Enter Your Electronics & Design Project for a chance to win an $200 Shopping cart of product! Submit an EntrySubmit an Entry  Back to homepage Project14 Home Monthly Themes Monthly Theme Poll   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 in this blog. ...
Restoration & Repair Enter Your Electronics & Design Project for a chance to win an $200 Shopping cart of product! Submit an EntrySubmit an Entry  Back to homepage Project14 Home Monthly Themes Monthly Theme Poll   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.   In this blog, ...
Restoration & Repair Enter Your Electronics & Design Project for a chance to win an $200 Shopping cart of product! Submit an EntrySubmit an Entry  Back to homepage Project14 Home Monthly Themes Monthly Theme Poll   For Project 14's Restoration and Repair month, I'm going to service a Philips GA-212 Electronic turntable that needs some TLC. I have a perfectly working one too. When everyone switched to CDs, they moved their TTs to the attic. It seems that people got tired of ...
dhilos

A Simple Waffle Maker Fi

Posted by dhilos Apr 2, 2020
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 not available online so I just search for the relay at Element14 website. I managed for find a relay having the same specs. After replacing the relay, everything works fine. (Something wrong with the site, I can't attach photos even with  ...
Restoration & Repair Enter Your Electronics & Design Project for a chance to win an $200 Shopping cart of product! Submit an EntrySubmit an Entry  Back to homepage Project14 Home Monthly Themes Monthly Theme Poll   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 write-up of my re ...
Restoration & Repair Enter Your Electronics & Design Project for a chance to win an $200 Shopping cart of product! Submit an EntrySubmit an Entry  Back to homepage Project14 Home Monthly Themes Monthly Theme Poll   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). You 'd then u ...
Restoration & Repair Enter Your Electronics & Design Project for a chance to win an $200 Shopping cart of product! Submit an EntrySubmit an Entry  Back to homepage Project14 Home Monthly Themes Monthly Theme Poll   Personally I prefer to repair the broken electronic device instead of buying new one. The typical scenario is a headphones where the most common case is broken jack or cord. Fixing of this issue takes around 5 - 15 minutes and it is quite simple.   Required ...