Zak28
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Today, 09:16Howcome the 200v 1A method would only yield a 1-2mm arc? Carbon electrodes put out copious UV and heat which readily ionizes gasses. The CC...5 replies | 233 view(s) -
Today, 04:16That is a hazard which can be removed with a series resistor to the pot or using a voltage divider instead of the pot. But the question was...3 replies | 78 view(s)
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Today, 01:38The arcs are started by separating them slowly heating and ionizing the area in between. Should be fine if done slower to prevent gap from being...5 replies | 233 view(s)
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Today, 00:51Zak28 replied to a thread Stacking diodes for high voltage rectification in Elementary Electronic QuestionsThose have capacitances lower than point contact diodes. They should work - are you aware of any retailers stocking their products?27 replies | 574 view(s)
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Today, 00:49Is it safe to use a PMOS with a lower Vds than its NMOS counterpart? It seems only the NMOS counterpart interacts with the high voltage and the...3 replies | 78 view(s)
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Yesterday, 23:23Zak28 replied to a thread Stacking diodes for high voltage rectification in Elementary Electronic QuestionsWhat are those diodes which are nearly capable of doing this? Any diode has some capacity at its junction unless its a very low voltage high current...27 replies | 574 view(s)
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Yesterday, 23:06Zak28 replied to a thread Stacking diodes for high voltage rectification in Elementary Electronic QuestionsWhat you detailed simply states no RC snubber & resistor combination will permit the diodes to make rectified high voltage since at the minimum of...27 replies | 574 view(s)
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Yesterday, 06:05Zak28 replied to a thread Stacking diodes for high voltage rectification in Elementary Electronic QuestionsThe load appears to be capacitive, certainly nothing inductive - however would ordinary fast recovery diodes work if their package permits lots of...27 replies | 574 view(s)
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20th August 2019, 23:19Zak28 replied to a thread Stacking diodes for high voltage rectification in Elementary Electronic QuestionsSuch as these? http://www.vishay.com/docs/86040/byv26.pdf http://www.vishay.com/docs/88961/byg21k.pdf27 replies | 574 view(s)
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20th August 2019, 22:09Zak28 replied to a thread Stacking diodes for high voltage rectification in Elementary Electronic QuestionsIs it fine to omit RC snubber and only put a resistor across each diode instead?27 replies | 574 view(s)
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20th August 2019, 08:15Zak28 replied to a thread Stacking diodes for high voltage rectification in Elementary Electronic QuestionsOmitting the RC snubbers would still make distortion on the output?27 replies | 574 view(s)
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20th August 2019, 05:56Zak28 replied to a thread Stacking diodes for high voltage rectification in Elementary Electronic QuestionsThis 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...27 replies | 574 view(s)
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20th August 2019, 03:09Zak28 replied to a thread Stacking diodes for high voltage rectification in Elementary Electronic QuestionsBut there isn't any capacitance since each junction is already ~18pF (1kv SMA schottky) and series stacked should only reduce them further. The...27 replies | 574 view(s)
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20th August 2019, 02:26Zak28 replied to a thread Stacking diodes for high voltage rectification in Elementary Electronic QuestionsBut 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?27 replies | 574 view(s)
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20th August 2019, 00:43Zak28 replied to a thread Stacking diodes for high voltage rectification in Elementary Electronic QuestionsThis is for 200khz-1Mhz - diodes would be 1n4007 for mains voltage rectification. Infact there are many inexpensive high voltage diodes but they are...27 replies | 574 view(s)
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20th August 2019, 00:29Typically 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...5 replies | 233 view(s)
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19th August 2019, 22:21Zak28 replied to a thread Stacking diodes for high voltage rectification in Elementary Electronic QuestionsFrom the mentioned site K50UF looks ideal but uf4007 is faster. Those specialty diodes are likely much more costly than standardized uf4007 parts. ...27 replies | 574 view(s)
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19th August 2019, 01:57Zak28 started a thread Stacking diodes for high voltage rectification in Elementary Electronic QuestionsWould 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...27 replies | 574 view(s)
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16th August 2019, 08:11Zak28 replied to a thread Automatic selection of element values of antennas impedance models in RF, Microwave, Antennas and OpticsSeems 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...2 replies | 163 view(s)
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16th August 2019, 08:05Zak28 replied to a thread Are there really ferrites for multi-GHz frequencies? in RF, Microwave, Antennas and OpticsSeems they aren't economical to mass produce otherwise they would likely be found in all the major cellphones, laptops and other devices which make...3 replies | 367 view(s)
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16th August 2019, 07:57Not sure were to obtain 4 & 5G specs in which there would be detailed minima and maxima power requirements for coverged serviced area. Is anybody...0 replies | 107 view(s)
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15th August 2019, 11:13Zak28 replied to a thread [SOLVED] magnet wire parasitic properties in Elementary Electronic QuestionsThe text depicts formuli per winding arrangement consolidating a large area by using formuli instead. There is very practical standardized wire...5 replies | 248 view(s)
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15th August 2019, 00:07Were is a well established chart depicting parasitic self capacity of varying magnet wire sizes per unit of length? Much akin to wire having self...5 replies | 248 view(s)
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13th August 2019, 07:10Zak28 replied to a thread [SOLVED] voltage and current waveforms spark gap in Elementary Electronic QuestionsAn ordinary spark gap for an ordinary AC tesla coil doesn't make loads of harmonics?9 replies | 416 view(s)
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12th August 2019, 21:01Zak28 replied to a thread [SOLVED] voltage and current waveforms spark gap in Elementary Electronic QuestionsDoes a spark gap when breaking over make many harmonics?9 replies | 416 view(s)
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12th August 2019, 00:16Zak28 replied to a thread [SOLVED] voltage and current waveforms spark gap in Elementary Electronic QuestionsCan a semiconductor completely replicate the SG operation?9 replies | 416 view(s)
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11th August 2019, 00:29Semiconductors are very prone to destruction whilst operating. Power your PCB and expose it to a large van de graaff generator, You can also retry...6 replies | 323 view(s)
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10th August 2019, 20:58Zak28 started a thread [SOLVED] voltage and current waveforms spark gap in Elementary Electronic QuestionsCan anybody post current and voltage waveforms. Could not locate current and voltage waveforms of spark gaps found in ordinary tesla coils. The...9 replies | 416 view(s)
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8th August 2019, 10:43Does hFE vary while BJT is in operation within the specified hFE min/max ranges? ...3 replies | 152 view(s)
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7th August 2019, 03:49But this is only because the industry really likes to isolate mains conduits from the rest of the circuit using transformers. Nothing is really mains...10 replies | 550 view(s)
About Zak28
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