Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes USAF radar shop Notable Quotes App Notes Calculators Education Engineering Magazines Engineering magazine articles Engineering software Engineering smorgasbord RF Cafe Archives RF Cascade Workbook 2018 RF Stencils for Visio RF & EE Shapes for Word Advertising RF Cafe Homepage Sudoku puzzles Thank you for visiting RF Cafe!
MECA Electronics Attenuators

Electronics Poetry - "Power Supply"
September 1942 QST Article

September 1942 QST

 September 1972 QST  Cover - RF CafeTable of Contents

Wax nostalgic about and learn from the history of early electronics. See articles from ARRL's QST, published December 1915 - present. All copyrights hereby acknowledged.

Ode to a Power Supply? Well, maybe not really an ode, but this poem titled, "Power Supply," written by Eileen V. Corridan, appeared in the September 1942 edition of the ARRL's QST magazine.

It is really quite entertaining and instructive! It applies for the original tube-based circuit as well as for modern solid state versions. I somehow get the feeling that this poem will now be republished in many places.

Power Supply

by Eileen V. Corridan


The how and why of a power supply
Is something very quaint.
It takes the a.c. current
And makes it what it ain't.

Here are a few other electronics-themed poems:

 • "Power Supply," by Eileen Corridan

 • "Ravin," by Meyer Dolinko

 • "Pre-Radio," by Simpson Sasserath

 • "A Radioman's Nightmare," by Editor, QST

 • "Unpopular Electronics," by Saunder Harris

 • "More 'Tower' to You," by David Moore


You start with good ole a.c.
But you need some pure d.c.
How the PS finally makes it
Is now quite clear to me.


First, gimme a primary winding;
A secondary, too.
Now I've got a transformer­
Let's see what it will do.


The primary takes the line juice;
Inductance does the rest.
But you gotta split the secondary
To do its job the best.


"Less turns in the coil for the heater,
More turns for the plate supply."
We've still got only a.c.
Which the tube will rectify.


Now we come to the moment
When tube and a.c. meet.
Just keep in mind a rectifier
Acts like a one-way street.


A.c. travels in wave form
From plus to minus, and then
It simply changes direction
And does it over again.


But the tube says, "Nothing doing­
This is no swinging door.
I'll take one-half of your wavelengths,
One-half - and nothing more!"


At least a half-wave rectifier
Would act about that way.
We'll use another plate in there
And thus save wave and day.


So now one plate says, "Come ahead."
It takes its half-waves through
The other plate is minus, then;
It has no job to do.


Then comes along the other half.
The second plate starts working.
So half and half are now a whole
While number one plate's shirking.


From filament to filtering
The current that is flowing
Is now d.c. - pulsating kind ­
That toward the filter's going.


It isn't pure by any means.
Its ripples need some smoothing.
Chokes and condensers serve for this;
The waves find these quite soothing.


The filter circuit works like this:
In a condenser-input filter,
Inductance and capacitance
Keep pure d.c. in kilter.


Pulsating d.c. also has
Some a.c. current flowing.
Condensers short the a.c. out,
And chokes keep d.c. going.


And so at last like Ivory Soap
Our current's pure d.c. 
I must confess this whole darn thing
Has made a wreck of me, see?



Posted March 21, 2011

Custom MMIC Eliminating Mixup over Mixers - RF Cafe QuinStar Technology (Millimeter Wave Solutions) - RF Cafe
Res-Net Microwave - RF Cafe
About RF Cafe
Kirt Blattenberger - RF Cafe Webmaster
Copyright: 1996 - 2024
    Kirt Blattenberger,

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:  AirplanesAndRockets.com