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| Joined: | Feb 7th, 2010 |
| Location: | Des Moines, Iowa USA |
| Posts: | 425 |
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This has that audio BUZZ just like that radio receiver that uses 13 frequencies (can't remember the name). The difference between the original germanium diode and your switching diode (zenear) is that the germanium will block energy one way, and allow it to travel in one direction only (DC) and a "zener" Diode like yours not only BLOCKS...but allows it to travel the other way also IF the current gets high enough to "trip" over the blockage. So it will travel in an AC fashion. Do you remember if you were near a fluorescent light source? That would very easily explain the "buzzing" noise from the 60hz electrical field (US) - 50hz Europe. Do you still have the circuit? Or did you just put it together OUTSIDE the box and grounded to this box as shown in the picture(metal bottom maybe...like a large capacitance devise). Did you get any different results while holding it?? Was this BUZZING a very common effect or only sometimes it would be noticeable? Was this buzzing the effect of an external "amplification" devise or circuit? Do you still have the box laying around where you can "try again". I realize this is an old post...but a certain Google search brought up this page.