hi everyone,
I have attached photos containing 3 fake HV 100ns 10KV,25KV,40KV diodes that can't support frequency higher than
100HZ.Verified using signal generator.
These diodes are all purchased from ebay
Please avoid these diodes at all cost.I had my suspicion on the diodes in the past until i built a Don Smith device i have confirmed these diodes are not designed to operate at high frequency.
I have waste over 100USD on these diodes.Imagine 1 40KV diode cost around 22USD
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Hi Grumage,
I have some success with Don smith device late yesterday night which i am able to light 5watt and 60watt 220volt bulb at around 110volts from the Don smith secondary coil.
Tuning the Don smith device was a real pain but once the 5 turn primary winding is positioned nicely in the pvc pipe and the duty cycle can be made very low 10% ...18% at 55KHZ and consume around 2Amps from 12volt battery.
I'm able to see trumpet waveform which increase in amplitude.
Primary coil
5 turns of 8AWG copper,
3uH <0.2 Ohms is connected in parallel with
0.3uf caps.My plan was to get around 205KZ
Using somewhat similar setup as the China Don Smith replication device which was using a B&W coil 2414 or 2404 in "CW direction" for both winding.
For some strange reason i'm able to get power only from one secondary coil.Trying to place primary coil exactly in the center don't produce high voltage output.
The primary coil\0.3uf caps is powered by 600volt mosfet.First using 12volt battery as supply and improved light output by using a 10amp step up boost converter to convert 12volt battery to around 60volts under load 2amp at around 10% duty cycle.
Tuning caps used 0.1uf 4000v x 2 in series.For the time being i'm using <30ns 600volt diode for the Don smith device.
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I have just destroyed 2 of my PWM signal generator in 24 hours is a cheapskate sig generator
UDB1000 (Shorted Gate and Drain at mosfet killed the output stage)and another
SG3525AN PWM IC (Connected to 60volt supply from boost converter and killed it.Max supported voltage is mere 35volt).
I can't show any demo of my Don Smith for time being without any functioning sig generator.
In the meantime i will need to get 50pcs of <30ns 600volt DIODE to form HV diode so that i'm able to connect to NST 10KV,30mA.
These diodes will also be used for Kacher tesla coil experiment as well.
http://www.youtube.com/watch?v=JECf2SJAwQ0---------------------------------------------
The replication of my Don smith device is considered a success since i am already able to light 60watt bulb at 12v or 60volts supply,once i get resonance.
5uf caps in parallel with bulb.
Do take note Don smith device was suppose to be powered by high voltage around 1KV onwards..
The advantage in powering don smith device at high voltage is the duty cycle can be kept low
10% <20% and the amp draw from battery can be reduced.
I may create a another set of Don smith secondary winding which would be CW&CCW instead of CW only.