Thanks to Mr. Joe Hernandez (KN2A), the
entire set of four manuals for the Cleveland Institute of Electronics' 515-T Slide Rule are now available
online! Joe bought the manuals and slide rule on eBay as a set, and he was kind enough to scan the manuals
and send them to me for posting on RF Cafe. Since posting a photo of my personal N-515-T slide rules
and the partial user's manual I found a few years ago, I have received many requests for the manuals.
Cleveland Institute of Electronics N-515-T Slide Rule (made by Pickett)
Note: Joe is a very active Ham radio operator and invites you to visit his page on the
qrz.com/db/KN2A website. He is a big time
CW guy who likes to tinker. One item you really need to check out is his custom-built
Mouser-40 and
3 Blind Mice CW setup.
Joe Hernandez's (KN2A) Mouser-40 and 3 Blind Mice CW setup.
Of Beer Bottles and Slide Rules
 RF Cafe visitor
M0XPD sent me
a link to his brief article that aptly illustrates how
a Pickett N-515-T
slide rule and a beer bottle can be used to help a student understand resonance in LC tank circuits.
It has to do with the oft-used mechanical phenomenon dual of an electrical apparatus - like a wire is
a water hose, voltage is the pressure, etc.
 m0xpd Manchester, United Kingdom Engineer, who grew up in the
age when hobbyists used a soldering iron (rather than a mouse) to mess with computers. Came late in
life to amateur radio, where he operates the station m0xpd, conducts pointless experiments, and
plays with words and ideas.
Posted November 3, 2015
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