Radio-Lectric no. 420 template use? Wondering what this would be used for, found in a box with some radio rule circuit diagrams. Knob turns to loosen/tighten, all three metal pieces slide.
![](https://preview.redd.it/radio-lectric-no-420-template-use-wondering-what-this-would-v0-ykm28cy1se2a1.jpg?auto=webp&s=514623ebf6503665f86a3c9824b41432173ff228)
![](https://www.gutenberg.org/cache/epub/72572/images/cover.jpg)
Computers—The machines we think with
![](https://image.isu.pub/081028134520-75cd5e1f135d47aa9231d89ef57b3af0/jpg/page_1_thumb_large.jpg)
Technician's Heating Catalog by F.W. Webb Company - Issuu
![](https://img.yumpu.com/45468693/1/500x640/modifications-for-the-icom-rogerk.jpg)
Modifications for the ICOM - RogerK
Computer simulation techniques for forecasting snowmelt runoff
![](https://content.instructables.com/FSM/1SS5/GVOX0TWQ/FSM1SS5GVOX0TWQ.png?auto=webp&fit=bounds&frame=1auto=webp&frame=1&height=150)
The Box Radio : 11 Steps - Instructables
![](https://i.ibb.co/fxNMJ6M/bigbetsy.jpg)
Forums - Steve's BIG B Project
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Set of metal tools. Tongs look to about two feet long. Includes files, tong with a point and fly nut to hold something, and what appears to be hole punches. : r/whatisthisthing
![](https://preview.redd.it/approximately-six-inch-long-metal-tool-set-the-handles-slot-v0-f5yqwqhnx38a1.jpg?auto=webp&s=b8a4d473c24d345b154588a95c1c39b8b4c00678)
Set of metal tools. Tongs look to about two feet long. Includes files, tong with a point and fly nut to hold something, and what appears to be hole punches. : r/whatisthisthing
![](https://img.yumpu.com/47781802/1/500x640/radio-tv-experimenter-1965-10-11.jpg)
Radio-TV-Experimenter-1965-10-11
Mathematical model of spring flood formation and possibilities of its use for short-range forecasting
![](https://content.instructables.com/FD1/O1Z5/GVSACOEJ/FD1O1Z5GVSACOEJ.jpg?auto=webp&frame=1&width=320&md=11d1b0cac3cb139b96ba54869f6ec664)
The Box Radio : 11 Steps - Instructables