When I built this I found that the resistor labelled "120 or to taste" was best substituted by Strawberry+jOrange . And make sure to use a mark I batterang by the 11kg inductor - the markII doesn't work at all, Adam West'll hook you up if you have any problems finding one, but do not buy any of the knock-offs from Burt Ward.
I'm actually from 2057, and made the circuit for fun. Then when I switched it on, I was time-displaced and teleported back to 2017. As another poster has said, the problem is probably:
The flux capacitor is shorted.
Hence the huge time drift.
I'm trying to build a new one, so that I can get back to 2057, but it needs software, and the software team are having great difficulty, understanding the problem. See Here (picture at bottom of post):
Finally, before I go, a quick severe warning from the future (2057), about Trump, whatever you do get ~#%"%&%&"Error 29 - Keyboard battery failure (usually caused by a
batteriser failure). We hope this error does not affect you.
Finally someone has taken the time to reverse engineered the bateriser