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Type: Posts; User: Zak28

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  1. Closed: Re: Stacking diodes for high voltage rectification

    Such as these? http://www.vishay.com/docs/86040/byv26.pdf http://www.vishay.com/docs/88961/byg21k.pdf
  2. Closed: Re: Stacking diodes for high voltage rectification

    Is it fine to omit RC snubber and only put a resistor across each diode instead?
  3. Closed: Re: Stacking diodes for high voltage rectification

    Omitting the RC snubbers would still make distortion on the output?
  4. Closed: Re: Stacking diodes for high voltage rectification

    This was to rectify high frequency sines in am envelopes modulated by low frequency sines.

    But it seems that you pointed out unless the output is capable of high power outputs diode stack will...
  5. Closed: Re: Stacking diodes for high voltage rectification

    But there isn't any capacitance since each junction is already ~18pF (1kv SMA schottky) and series stacked should only reduce them further. The inductance isn't enough to cause ringing since its smt...
  6. Closed: Re: Stacking diodes for high voltage rectification

    But there is hardly any current, its well under 5mA which is a small fraction of the diodes current rating.

    Whats the cause for this to not work?
  7. Closed: Re: Stacking diodes for high voltage rectification

    This is for 200khz-1Mhz - diodes would be 1n4007 for mains voltage rectification. Infact there are many inexpensive high voltage diodes but they are slow such as those found in micowave ovens.
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    Closed: carbon arc modalities

    Typically carbon arcs are made with either DC or AC but in no cases does one find them being generated using a constant current method. This is because constant current arcs are extremely power...
  9. Closed: Re: stacking diodes for high voltage rectification

    From the mentioned site K50UF looks ideal but uf4007 is faster. Those specialty diodes are likely much more costly than standardized uf4007 parts.

    Whats done to make sure every diode in the stack...
  10. Closed: Stacking diodes for high voltage rectification

    Would a stack of 100 series uf4007 diodes actually be able to rectify ~95Kv if properly insulated so as to prevent any arcing?

    Seems the plastic encapsulation would give way to arcing to the other...
  11. Closed: Re: Automatic selection of element values of antennas impedance models

    Seems using a FEM frontend is by far quickest means to do this, for instance COMSOL provides you with a means to input an antenna and from there you can modify its parameters including physical...
  12. Closed: Re: Are there really ferrites for multi-GHz frequencies?

    Seems they aren't economical to mass produce otherwise they would likely be found in all the major cellphones, laptops and other devices which make use of wifi and similar RF bands. Log periodics...
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    Closed: Cellular Power Densities

    Not sure were to obtain 4 & 5G specs in which there would be detailed minima and maxima power requirements for coverged serviced area.

    Is anybody familiar with their min&max power densities?

    If...
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    [SOLVED]Closed: Re: magnet wire parasitic properties

    The text depicts formuli per winding arrangement consolidating a large area by using formuli instead.

    There is very practical standardized wire information tables not commonly available elsewhere...
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    [SOLVED]Closed: magnet wire parasitic properties

    Were is a well established chart depicting parasitic self capacity of varying magnet wire sizes per unit of length?

    Much akin to wire having self induction but in this case capacitance.
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    [SOLVED]Closed: Re: voltage and current waveforms spark gap

    An ordinary spark gap for an ordinary AC tesla coil doesn't make loads of harmonics?
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    [SOLVED]Closed: Re: voltage and current waveforms spark gap

    Does a spark gap when breaking over make many harmonics?
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    [SOLVED]Closed: Re: voltage and current waveforms spark gap

    Can a semiconductor completely replicate the SG operation?
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    Closed: Re: Whats the best way to ESD damage a PCB

    Semiconductors are very prone to destruction whilst operating. Power your PCB and expose it to a large van de graaff generator, You can also retry your methods when its powered. Alternately you can...
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    [SOLVED]Closed: voltage and current waveforms spark gap

    Can anybody post current and voltage waveforms. Could not locate current and voltage waveforms of spark gaps found in ordinary tesla coils. The current avalanches between the electrodes - does this...
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    [SOLVED]Closed: dc current gain variations

    Does hFE vary while BJT is in operation within the specified hFE min/max ranges?

    https://www.mouser.com/datasheet/2/408/TTA0002_datasheet_en_20131101-1144060.pdf
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    Closed: Re: Residential Wiring Offset Voltage

    But this is only because the industry really likes to isolate mains conduits from the rest of the circuit using transformers. Nothing is really mains powered, its transformer powered. Transformers...
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    Closed: Re: Residential Wiring Offset Voltage

    The trouble is 3v offset at neutral can set off Vgs its fine to just use earth conduit for fullwave?

    Rest of circuit is omitted.

    https://i.ibb.co/ChyB3Q6/img.png



    Neutral is grounded at...
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    Closed: Re: Residential Wiring Offset Voltage

    Is there any method to null out any floating voltage on the floating neutral in the industrial or residential mains but without any transformers?

    Shouldn't the powerbars have a pair of MOVs 1...
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    Closed: Re: Residential Wiring Offset Voltage

    Max mains voltage can be 126V of which 5% is 6.3V which seems the neutral can float to 6.3V above ground.
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