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1950’s Digital Electronics “Vacuum Tube Goodness” – Will It Still Work?

Let’s see if this 50’s digital counter will work! This is an HP 521DR electronic counter. Let’s power it up! For links, click the SHOW MORE tab below.

To learn electronics in a very different and effective way, and gain access to Mr Carlson’s personal designs and inventions, visit the Mr Carlson’s Lab Patreon page here:

#learnelectronics #electronicsvideos #MrCarlsonsLab

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