additron

[DummyLoad]

advanced technology at the time... 1 bit full adder vacuum tube developed circa 1950. i had no idea such technology existed. i was always under the assumption that the logic elements in the day were totally discrete.

BTW, a full adder has a carry input so 1+1=1 if carry-in=1, carry-out=1. a half adder has no carry input, so 1+1=0 carry=1. google for truth tables.


https://www.eeweb.com/profile/max-maxfield/articles/mysteries-of-the-ancients-the-additron-tube


--pete

[PRR]

http://www.mif.pg.gda.pl/homepages/frank/sheets/201/6/6047.pdf

[PRR]

This says it is (I did not check) a full-adder in BJT. The stacked pairs would not work as well in hollow-state.

I'm also finding 14 and 20 transistor schemes. More parts is, of course, potentially faster or better defined outputs.

All this was lost when RTL made raw device logic obsolete.

I wonder how the Additron would sound in a fuzz pedal?

[shooter]

I wonder how the Additron would sound in a fuzz pedal?

warm snuggly

I failed at standard algebra but ate up Boolean, go figure!