It wasn't until February 1 1972, that Hewlett-Packard introduced
HP-35 electronic calculator. Before that, when you spoke
of an electronics calculator it referred to a computer (likely
a vacuum tube type), a human who specialized in electronics
calculations, or this special slide rule sold by Cleveland Electronics
Institute - the 515-T. It had special scales for calculating
reactance, and resonance, and had common circuit analysis formulas
printed on the back side.
Here is an RF Cafe web page dedicated to
slide rules and my small collection that includes a 515T.
I will gladly accept a donation and credit you accordingly.
Start Using This Remarkable Electronics Slide Rule
Be the man who's always first to say: "I've got the answer
Some day everyone in electronics may have a slide rule like
this. Till then, the man who uses one will seem like a wizard
as he solves reactance and resonance problems in 12 to 20 seconds
- without pencil and paper.
This is a professional slide rule in every detail, a full
10" long, made exclusively for Cleveland Institute of Electronics,
to our rigid specifications, by Pickett, Inc. It can be used
for conventional computation as well as special electronics
calculations. All-metal construction assures smooth operation
regardless of climate.
Institute 515-T Slide Rule(made by Pickett)
Send me an
e-mail if you want a PDF file
of a partial (10 pages)
copy of the
[Buy the complete manual
Handsome top-grain leather carrying case has heavy-duty plastic
liner to protect slide rule; removable belt loop for convenient
carrying. "Quick-flip" cover makes it easy to get rule in and
out of case.
You also get four full-length AUTO-PROGRAMMED™ Lessons,
which teach you how to use the special electronics scales on
the slide rule. These lessons have been carefully designed to
meet the same high educational standards as the electronics
career courses for which our school is famous. Even if you've
never used a slide rule before, you'll soon whiz through the
toughest problems with this CIE rule.
Deliberately underpriced. Many men in electronics have told
us that this unique slide rule, leather case, and 4-lesson course
easily add up to a $50 value. But we have deliberately underpriced
it at less than $25. Why? Our reason is simple: we are looking
for men in electronics who are ambitious to improve their skills
... who know that this will require more training. If we can
attract you with the low price of our slide rule and course-and
impress you with its quality - you are more likely to consider
CIE when you decide you could use more electronics training.
Send for free booklet. See for yourself why this amazing
slide rule and course have made such a big hit with busy electronics
men everywhere. No obligation, of course - just an opportunity
to get in on the best offer ever made to people in electronics.
Just mail coupon, or write Cleveland Institute of Electronics,
Dept. EW-142, 1776 East 17th St., Cleveland, Ohio 44114.
Cleveland Electronics Institute's "Electronics
Here is the original scan.
August 1967 Electronics World
of Contents] People old and young enjoy waxing nostalgic about
and learning some of the history of early electronics. Electronics World
was published from May 1959 through December 1971. All copyrights are hereby acknowledged.
Electronics World articles.
Posted May 6, 2013