In 1962, the USA carried out a nuclear EMP experiment in high altitude near Hawaii:Except the Z1 is electro-mechanical and an EMP might still knock it offline.
Source:Wikipedia said:Starfish Prime caused an electromagnetic pulse (EMP) that was far larger than expected, so much larger that it drove much of the instrumentation off scale, causing great difficulty in getting accurate measurements. The Starfish Prime electromagnetic pulse also made those effects known to the public by causing electrical damage in Hawaii, about 900 miles (1,450 km) away from the detonation point, knocking out about 300 streetlights,(p5) setting off numerous burglar alarms, and damaging a telephone company microwave link. The EMP damage to the microwave link shut down telephone calls from Kauai to the other Hawaiian islands.
Source:Wikipedia said:Older, vacuum tube (valve) based equipment is generally much less vulnerable to nuclear EMP than solid state equipment, which is much more susceptible to damage by large, brief voltage and current surges. Soviet Cold War-era military aircraft often had avionics based on vacuum tubes because solid-state capabilities were limited and vacuum-tube gear was believed to be more likely to survive.
Source:Wikipedia said:An EMP has a smaller effect the shorter the length of an electrical conductor; though other factors affect the vulnerability of electronics as well, so no cutoff length determines whether some piece of equipment will survive. However, small electronic devices, such as wristwatches and cell phones, would most likely withstand an EMP.
Ah the nostalgia. You motivated me to take down my old Post from the wall to see what scales it had. When I used it actively, I knew the purpose of all those scales and I found productive uses for them.Obviously the scales A, B, C & D had no meaning to the author, while the L scale on the rear was not Log because it was Linear !
ex LL0 0.001→0.01
e-x LL/0 -0.001→-0.01
sec T ST
e-x LL/1 -0.01→-0.1
e-x LL/2 -0.1→-1.0
e-x LL/3 - 1.0→-10.0
ex LL1 1.0→10.0
ex LL2 0.1→1.0
ex LL3 0.01→0.1
Not a slide rule, but an old style "flight computer"
The one on the bottom was a Post rule. That's the kind I had. (see #22 in this thread.) Post was made of bamboo, compared to metal for Pickets or plastic for other brands. Undergrads took great delight arguing which was best.The one at the bottom belonged to my wife's father.