I will always discourage Spooky machines. I am a member of the Rife forum. I was their when the south African guy and his legion of sock accounts came out with the first spooky, going on and on about "distance healing". Basically you send him some hair, spit and fingernails (and money) and he uses his special type of machine on that to cure you anywhere in the world via "Spooky" energy ..... Its horse shit.
The rife machine does generate a field effect and one can increase the size of the field through various methods, (amps, antenna , size of the bulb, logical stuff) One CAN NOT rife fingernails in south Africa and cure a persons cancer in America.
This topic caused a huge controversy on the rife forum, the south African dude was eventually banned and a moratorium was put on discussing spooky bullshit..... but time passed... occasionally a spooky machine will go up for sale (If your looking to buy a used rife machine the Rife Forum is the place to look, it is also a wealth of knowledge related to all aspects of Royal rife and his machines and their derivatives.)
BUT I REMAIN STEADFAST IN MY SUGGESTION DO NOT BUY A SPOOKY they are crap.... in the rife machine scene you will see crap because it is something the medical industry wants supressed. People make fake machines with bullshit claims to subvert the reality of it.
If I could rife people by fingernails and spit I would never of traveled all the fuck over BFE... Also I never charged. I didn't refuse tips because people would insist and it seemed rude to turn em down but if people couldn't give me a dime I did not care, I just wanted the anecdotal evidence case by case and I liked helping people get well.
TL;DR Spooky machines are not Rife machines , they are faking liars.