The $20 trick was to buy an old wrist wash with the radioactive glow in the dark number and watch hands. Wind up the watch, use two sided tapeRadium[edit]
A 1950s radium clock, exposed to ultraviolet light to increase luminescence
Main article: Radium dials
Radioluminescent paint was invented in 1908 and originally incorporated radium-226. The toxicity of radium was not initially understood, and radium-based paint saw widespread use in, for example, watches and aircraft instruments. During the 1920s and 1930s, the harmful effects of this paint became increasingly clear. A notorious case involved the "Radium Girls", a group of women who painted watchfaces and later suffered adverse health effects from ingestion. It is now recognised that radium paint requires great care in application, maintenance and disposal to avoid creation of a hazardous condition.
Radium paint used zinc sulfide phosphor, usually trace metal doped with copper (for green light), silver (blue-green), and more rarely copper-magnesium (for yellow-orange light). The phosphor degrades relatively fast and the dials lose luminosity in several years to a few decades, despite the long half-life of the Ra-226 isotope (1600 years); clocks and other devices available from antique shops and other sources therefore are not luminous any more, though they are still radioactive and can be identified with a Geiger counter. The dials can be renovated by application of a very thin layer of fresh phosphor, without the radium content (with the original material still acting as the energy source); the phosphor layer has to be thin due to the light self-absorption in the material.
and tape it to the right side of the Tesoro control box.
Now the paint that was used being radioactive as well as the mechanical movement of the watch parts creates an energetic pulse every time the second hand moves. The Tesoro circuitry picks up this pulse that excites the Sntek .47uf capacitors found on the board, they now have a better charge and discharge rate. Its just enough to boost the TX and RX signals from the coil allowing the processor IC chips to see deeper and smaller targets.
You have to make sure you only use the old wristwatches with the wind up mechanism. The 19 jewel movement versions made in Switzerland work the best. The new digital watch battery type with luminous glow in the dark paint will not work. Results will very depending upon watch manufacturer.
First , these watches are no longer made and like the artical explains the watch hands loose the glow . I find it very hard to believe this ... I have a few of these vintage watches today but I sold my Tesoro's ... but I ain't buying one to check this out ... any other manufactures use these capacitors ???? Woodstock
The $20 Bill I put away for this mod is getting mouldy 
I couldn't figure out how to get the flux in the capacitor so...
Coinmaster will probably come up with a more better one anyway.
