> Is frequency drifting a 'feature' of the 555 timer chip? No, I suspect that it is mostly temperature related. You could leave it on a while and make sure it was warmed up. It holds 1Hz pretty well on the Rife frequencies, but (with more experience on the device now) it does drift up AND down at high frequencies like 100K and more. It will generally stay in the vicinity of the chosen frequency, and vary a few Hz either way. I think of this as a "feature", though, since as I said earlier, the irregular duty cycle will produce harmonics around the chosen frequency anyway, which may be more effective.
As for Ken C's suggestion about squaring up the output at Clark frequencies: I will look at the rounding of square waves at high frequencies as a feature, too :). This will decrease the harmonics, but since at high frequencies one is going for direct frequency rather than harmonic effects, this is good. > This drifting 'feature' could render this frequency generator useless > for inclusion in a Bare-Rife device... I think it helps. I don't think that the frequencies are carved in stone, and many of Clark's frequencies are ranges. Again, the irregular duty cycle will produce harmonics both below, at, and above the chosen square wave frequency, which is an approximation anyway. If you are talking about using it as a reference for frequency generating equipment, that is quite correct, though. You want something accurate with compensation. Other notes: I built a set of nice banana jacked 1" copper pipe handholds for this zapper. I had been using silver ingot wrist electrodes with salt free electrolyte gel. Covered handholds with saltwater-ed paper towels, turned on zapper with frequency select on low, and ZAP, shocked me. About like a TENS machine turned too high. This indicates a need for an output attenuator - intensity control. Even with the wrist electrodes, 1 Hz is very uncomfortable. 20 Hz is bearable. If there is no intensity control, I would go with a 9V battery to be able to use the low frequencies (below 20Hz), and even so, not use copper pipe handholds. I suspect it is much safer to use low frequencies with this device when it is across the ankles. However, the low frequencies do work well with the self stick TENS pads, since they are not too conductive. With this, it can also serve as a low output TENS-type device. turf
