Donald Smith Devices too good to be true

[soundiceuk]

another technical request


How much level can the earth ground quality effect an over energy device ? i am doing some experiment where the earth play a critical role , standing waves can be seeing very easily either with a small light bulb or using a scope probes ..

all the test are based on the ETBC but with a ferrite rod inside, the capacitors banks can be charged only when there's an earth ground, now the question arise to how much level will affect the system ?


thanks in advance !

The earth ground is definitely important. Hence why Tesla used a 300ft deep earth over an aquifer for Wardenclyffe.

Yes, this is very exotic and unachievable by 99.9999999% of people.

You just have to do your best, based on your funds.

An 8ft deep dedicated ground rod is most probably going to be a basic necessity.

[soundiceuk]

Driver i used is based on 4046/4049 chips. Changed resistors (potentiometer) and capacitors for tuning.

Red led will light up when in resonance. at the moment with this flyback 75khz (max 35kvdc) input 19v AC half-wave rectified to DC. PVM pcb will be made today.

Different types of flybacks.
(1) from color TV 8kVpp
(2) and (3) from b&w TV 15-20kVpp
(4) diode split transformer 25kV DC
(5) flyback with integrated cascade 25kV DC

Which flyback are you going to use with home made PVM12 ?

[soundiceuk]

Another option for large tubes in 8" and 10" sizes is cardboard construction tubes. These are used as concrete forms for pouring posts and are sold in hardware and home improvement type stores. Note that the sizes are NOMINAL sizes, they ship a slightly-smaller-than-8", a true 8", and a slightly-larger-than-8" all telescoped together. Take a measuring tape when you grab one out of the bin so you get the size you're expecting. Cost: about $5 for a 4-foot tube.

Unfortunately this is a somewhat inferior option to PVC. The PVC is stronger and more rigid and won't deteriorate or absorb moisture like the cardboard can. But will it work? Yes, I have my little tabletop slayer exciter/Tesla coil wrapped around a cardboard mailing tube and it works fine.

You could always get some vehicle spray paint and lacquer. Then you could have any colour you wanted. It would be water proof too!

[tswift]

Another option for large tubes in 8" and 10" sizes is cardboard construction tubes. These are used as concrete forms for pouring posts and are sold in hardware and home improvement type stores. Note that the sizes are NOMINAL sizes, they ship a slightly-smaller-than-8", a true 8", and a slightly-larger-than-8" all telescoped together. Take a measuring tape when you grab one out of the bin so you get the size you're expecting. Cost: about $5 for a 4-foot tube.

Unfortunately this is a somewhat inferior option to PVC. The PVC is stronger and more rigid and won't deteriorate or absorb moisture like the cardboard can. But will it work? Yes, I have my little tabletop slayer exciter/Tesla coil wrapped around a cardboard mailing tube and it works fine.

[Wistiti]

Im curious...
What is the best price/ft or /meter you guys can find for 40kvdc wire? Let say 22awg like in the last pdf.

I think I have found a really great bargin for the hv wire....
Will let you know soon...

[Wistiti]

Im curious...
What is the best price/ft or /meter you guys can find for 40kvdc wire? Let say 22awg like in the last pdf.

[Wistiti]

Driver i used is based on 4046/4049 chips. Changed resistors (potentiometer) and capacitors for tuning.

Red led will light up when in resonance. at the moment with this flyback 75khz (max 35kvdc) input 19v AC half-wave rectified to DC. PVM pcb will be made today.

Different types of flybacks.
(1) from color TV 8kVpp
(2) and (3) from b&w TV 15-20kVpp
(4) diode split transformer 25kV DC
(5) flyback with integrated cascade 25kV DC

Thank you Mwjt for this informationon the flyback!

One thing I just do not understand is why is important to have an adjustment on the hv source... It is not more easy to have a fixed hvdc source and play with the gap of the ppv for tuning the frequency??

[Mwtj]

That is fine but the PVM12 is self tuning.

Mwtj still got his to work with something similar to your flyback driver.

Mwtj has apparently built his own PVM12 now.

There should be some new results published this week. I've been waiting very patiently!

Driver i used is based on 4046/4049 chips. Changed resistors (potentiometer) and capacitors for tuning.

Red led will light up when in resonance. at the moment with this flyback 75khz (max 35kvdc) input 19v AC half-wave rectified to DC. PVM pcb will be made today.

Different types of flybacks.
(1) from color TV 8kVpp
(2) and (3) from b&w TV 15-20kVpp
(4) diode split transformer 25kV DC
(5) flyback with integrated cascade 25kV DC

[soundiceuk]

Unfortunaly i am only about a 300 feet above sea level. A little less than i thought

Just went through my emails and messages.

Tswift = 1000 feet above sea level

Wistiti = 883 feet above sea level

Mwtj = 300 feet above sea level

Serendipitor = 295 feet above sea level

[Wistiti]

Where did you find it?

At the city construction department.

[soundiceuk]

My antenna measurements turned out quite similar to tswift. Using the latest circuit, 5.4.7, it is clear that the spark gap requires voltage peaks coming from the antenna in order to fire. This is quite different from the previous version, 5.4.6, which would energize the spark gap through the circuitry itself.

With the voltage across C1 at 10kV, spark gap spaced as minimally as I could (paper thickness) I am only seeing a discharge about once per second. I suspect that in a climate such as Tesla's Colorado Springs: very dry, high altitude, and electrically active, one would see more rapid sparking than this. In my low altitude, humid situation, with the antenna running under many large fir trees, there is not enough static around to make sufficient pulse rates, despite my trials of tuning to different frequencies. I believe my ground situation is adequate, with 2 1.2m copper coated ground rods, one in a small stream bed, the other in a wet area of standing water.

I await other reports and suggestions. I will consider the previous circuit for tests as well. Also, I will look at the antenna's output signal by itself, but with varying amounts of DC voltage on it, after properly decoupling the scope input, of course.

You need to change what you are using for D5.

I can't quite work out what is going on with those diodes and resistors in the picture.

[soundiceuk]

Finally I found a 8" pipe!!!
I may start wind the coil soon

Where did you find it?

[soundiceuk]

One thing I would like to see is the waveform across D5. What are people using at this point? I am not familiar with fast recovery diodes at this voltage level, but would be able to try a string of lower voltage units which are on hand. Certainly the current demands are tiny, given the 10Meg resistor in series.

Was just reading back through the pages since and spotted this.

I must have missed it before.

Seems like you are having similar problems to tswift.

What diodes did you try?

You need a 20kv, 100ma, 100ns diode.

[soundiceuk]

Here is the ZVS flyback driver I will use for the hv side.

That is fine but the PVM12 is self tuning.

Mwtj still got his to work with something similar to your flyback driver.

Mwtj has apparently built his own PVM12 now.

There should be some new results published this week. I've been waiting very patiently!

[Wistiti]

ZVS flyback driver

Here is the ZVS flyback driver I will use for the hv side.