This is a Article by Conrad Hoffman in “Electronics Now, April 1996”.He has an intriguing collection of electronics and Mechanical DIY Tips and Ideas in his site.
The Mini Metrology Lab – Conrad Hoffman
His “Electronic Mess” section has many pages on repairing and restoring old instruments and equipment.
An Excerpt from his pages is a Reading Pleasure due to his rich experience and enticing language.
Troubleshooting Audio Electronics
I ain’t gonna lie. You won’t be a master troubleshooter after reading a couple pages here. Hopefully, what I can do is give you the ability to form a logical plan of attack.
Troubleshooting is done mostly with the mind, not with the soldering iron. We all have problems that get the better of us, at least for a while, but approaching the situation as an interesting puzzle, rather than an unpleasant task to be suffered through, will make the work go quickly.
Success will come from a 3-prong approach, a combination of understanding the circuit, having the means to test it and being in the right frame of mind to correctly interpret the test data. Never underestimate that third component.
He also has a Design and Testing Services called Deep Run Design.
“One day I noticed a project, obviously homebrew, mounted on a piece of plywood, and nearly covering the worktable. When I asked him what it was, he glowed as bright as the half-dozen tubes that lit up when he turned it on. Twenty seconds or so later, out spews from the speaker the cracklings and whistles of 40 Meter CW. I was amazed, and at that moment the homebrew bug bit me hard. I was determined to build something myself, and get my ham ticket.”
N5ESE – Gizmos for QRP Ham Radio
N5ESE’s GIZMOs For the QRP Homebrewer and Ham Operator
“Everybody loves a “gizmo”. Hams have a weakness for them. Gizmos can be expensive for full-power amateur radio equipment, but homebrewing QRP gizmos is “cheap and easy”. Most of the projects here cost less than $20 (or nothing, if you have a modest junk box), and take only a few hours to build). Most are even suitable for the novice builder. And all have real practical value, especially for homebrewers and QRP operators. “
An Open Source “Learning EDA” Software which can setup circuit layouts. You may use it for stripboards, perfboards, breadboards, and even for plain circuitry or simulation. Creation and editing of symbols and elements on-the-fly using an integrated editor
BlackBoard – Circuit Layout.and Simulation
The Library has more than 300 different elements and symbols. Has an Integrated SPICE simulation support with netlist generator. NGSPICE Frontend (comes along with NGSPICE for Windows).
These are some of the Components in the Library. Makes Setting up a circuit layout fun.