SCR Motor Speed Control made from salvaged parts

[Paulo Bonini]

congratulations Paul, but, do you send-me eschematic diagrans?

[Paul Jones]

Paulo,

I no longer have the schematics or the original construction article that I used to fabricate the SCR motor speed controller. The circuit design came from an electronics construction article in either Popular Electronics or Popular Mechanics sometime in 1968 or 1969. If you can find the archives to these magazines, I am sure you will find the details on how to construct this. The speed controller has been very reliable for now close to 47 years and still in use every week for my Unimat lathe (see my publication http://www.homemadetools.net/forum/m...00-lathe-10111 ).

Thank you for your interest,

Paul Jones