The Tektronix 2235 is a 100 MHz dual-trace, dual-timebase portable scope. Tektronix 2235 has two channels and delayed sweep. This is still a pretty decent analogue oscilloscope (if you are looking for an analogue oscilloscope) with Large, Bright CRT screen. This oscilloscope has the U shaped handle that has detents which allow it to double →
The transistor, the component that created a revolution in modern, miniaturized electronics, turns 75 this week. The first transistor, developed by Walter Brattain and John Bardeen, consisted of the semiconductor germanium, gold, a crude spring and a metal base. See More: A Look Back at the Transistor on its 75 Birthday https://blog.adafruit.com/2022/12/14/a-look-back-at-the-transistor-on-its-75-birthday/ →
Star quad cable is a type of balanced audio cable that specializes in reducing electromagnetic interference. Quad cable is better at rejecting external noise than an equivalent single pair cable. Star-quad cable is a four-conductor cable that has a special quadrupole geometry which provides magnetic immunity when used in a balanced line. Four conductors are →
DC signals also affect the movement of the speaker cone which may result in a reduction of audio quality, although low level DC doesn’t damage the speaker. If you were to apply more than a little DC power to speakers, this will cause the voice coil to heat up significantly, which would likely cause damage. →
The electronica trade fair in Munich is just about to start. Electronica 2022 is the world’s leading trade fair and conference for electronics November 15–18, 2022 at Trade Fair Center Messe München Germany. After a four-year break, electronics professionals gather in Munich for the Electronica trade fair. Expectations are high for both companies and visitors. →
Here are links to some useful electronics component cross references: SMD Cross reference https://www.electronica-pt.com/db/smd.php Electronics component information search at www.epanorama.net https://www.epanorama.net/cgi-bin/semi.cgi →
Popular Electronics was created in 1954 by Ziff-Davis for an audience of electronics hobbyists and experimenters. It soon became the “World’s Largest-Selling Electronics Magazine”. For all of you interested in “Popular Electronics” from 1954 to 2003. Now free to read and download https://worldradiohistory.com/Popular-Electronics-Guide.htm →
Curve tracing is a classic way to learn more about many electronic components. Curve tracing is essentially a means of making a graph of current (I) versus voltage (V) called an I-V curve, to display the basic characteristics of an electronic device. I-V curves of the components are helpful in understanding their limitations and nonlinear →
I got an old HP mixed signal oscilloscope HP54645D. This is over 20 years old test instrument with CRT display. The 54645D is a 100 MHz, 2+16 channel Mixed Signal Oscilloscope from Agilent. Measure voltage or current signals over time in an electronic circuit or component to display amplitude, frequency, rise time, etc. Applications include →
Don’t do this! (There’s a much safer way) https://www.youtube.com/watch?v=M88e1r8nvYk Big Clive discovered there’s a “thing” going around where people are charging lithium cells by attaching a stripped USB lead directly to them. Normally lithium cells are very safe if undamaged and correct charging procedures are used. But overcharging them like this can result in cell →