On Saturday, March 9, 2019 at 12:01:26 AM UTC-5, Phil Allison wrote:> > What a fucking cunt and ham radio asshole !!! > > > > > .... PhilWhat sort of mental illness do you think Phil has? Anyone care to guess? Rick C.
AC offline to low-V supply, with a cap
Started by ●March 6, 2019
Reply by ●March 9, 20192019-03-09
Reply by ●March 9, 20192019-03-09
gnuarm.deletethisbit@gmail.com wrote:> On Saturday, March 9, 2019 at 12:01:26 AM UTC-5, Phil Allison wrote: >> >> What a fucking cunt and ham radio asshole !!! >> >> >> >> >> .... Phil > > What sort of mental illness do you think Phil has? Anyone care to guess?Alcohol induced dementia is indicated.
Reply by ●March 9, 20192019-03-09
gnuarm.del...@gmail.com wrote:> > Phil Allison wrote: > > > > > > > > > > > > > > > http://crcomp.net/electronic/securitylight/085-5411-MB.png > > > > > > > > > > > > > > > > > ** Don't think so - no way that concoction could work or be safe. > > > It's a diode bridge with 24V zeners in half of the legs. > > > > > > The first cap needs to be robust.. I'd guess. > > > > > > ** Learn to read a circuit some time - pal. > > That's what I like about Phil.** Here we go ....> He is always happy to give useful advice.** How would you like some - pal ?? Maybe "go fuck yourself" is good start ?> Prick C.** The troll and prize pricks are coming out of the cracks in the woodwork now. .... Phil
Reply by ●March 9, 20192019-03-09
gnuarm.del...@gmail.com wrote:> > > > What a fucking cunt and ham radio asshole !!! > > > > > > > > > > .... Phil > > > > What sort of mental illness do you think Phil has? > >** What sort of despicable, criminal convictions does this trolling Prick have? Anyone car to guess ?> Anyone care to guess? > > Rick C..... Phil
Reply by ●March 9, 20192019-03-09
On Saturday, March 9, 2019 at 12:27:30 AM UTC-5, Phil Allison wrote:> gnuarm.del...@gmail.com wrote: > > > > > > > What a fucking cunt and ham radio asshole !!! > > > > > > > > > > > > > > > .... Phil > > > > > > > > What sort of mental illness do you think Phil has? > > > > > > ** What sort of despicable, criminal convictions does this trolling Prick have? > > Anyone car to guess ? > > > > Anyone care to guess? > > > > Rick C. > > > .... PhilYep, he is wound up now!!! It never takes much to set him off. There has to be a name for what is wrong with Phil. I just don't know what it is. The really amazing part is that he seems to think that posting profanities on the Internet has some impact on somebody. Wow! How stupid is that??? Rick C.
Reply by ●March 9, 20192019-03-09
gnuarm.del> Phil Allison wrote: > > > > > > > > > > > > What a fucking cunt and ham radio asshole !!! > > > > > > > > > > > > > > > > > > > > .... Phil > > > > > > > > > > > > What sort of mental illness do you think Phil has? > > > > > > > > > > ** What sort of despicable, criminal convictions does this trolling Prick have? > > > > Anyone car to guess ? > > > > > > > Anyone care to guess? > > > > > > Rick C. > > > > > > .... Phil > > Yep, he is wound up now!!!** I've only just started on lying pricks like you.> It never takes much to set him off.** Absurd, gross, gratuitous insults are hardly not much. There has to be a name for what is wrong with Phil. ** There are names for what is wrong with you and you stinking ilk. Let's start with " autistic psychopath " and gutless fuckwit troll" for examples.> The really amazing part is that he seems to think that posting > profanities on the Internet has some impact on somebody. > >** Very strange what amazes complete morons like Prick C. The simplest things amaze folk who totally lack insight, have no honesty or any conscience whatever. I sincerely hope a nice dose of bowel cancer is coming his. .... Phil
Reply by ●March 9, 20192019-03-09
On Fri, 8 Mar 2019 18:01:15 -0800 (PST), George Herold <gherold@teachspin.com> wrote:>On Friday, March 8, 2019 at 8:54:26 PM UTC-5, Phil Allison wrote: >> Don Kuenz wrote: >> >> > >> > >> > AC outdoor security lights [1] typically use a dropper. The dropper >> > circuit inside of one looks like this: >> > >> > http://crcomp.net/electronic/securitylight/085-5411-MB.pngThe load seems to consume quite a lot of current (several mA) requiring quite large series capacitors. Typically capacitor input supplies are used when only a few mA is required, so the capacitor is smaller but still rated at sufficiently high voltage.>> ** Don't think so - no way that concoction could work or be safe. >It's a diode bridge with 24V zeners in half of the legs. > >The first cap needs to be robust.. I'd guess.I would suggest using a standard Y-cpacitors, which are tested for 2500 V for a few seconds. Assuming a "standard" 8/20 us lightning pulse with 2500 V peak, which is about 300 V/us. With 0.56 uF capacitance, that makes 168 A peak current through the capacitor i.e a practical short. Thus the 56 ohm series resistor will take most of the transient. At 2500 V and 56 series resistor, the current would be 45 A and peak power dissipation , of 112 kW lasting 28 uS or dissipating 3 J or actually half of that considering pulse rise and fall times. Thus a 1 W resistor should be sufficient, if there are several seconds between lightnings. Unfortunately lightnings often consists of multiple hits within a few hundred millisecond between them , so a few Watt resistor should be used. A wire would resistor also has some inductance, limiting the current. In countries with non-polarized mains plug, series Y-capacitors are used in both L and N lines.> >George H. >> >> > FWIW, Todd Harrison produced a video [2] that shows how to convert a >> > readily available medical grade isolation transformer into a tech iso >> > transformer. >> >> >> ** Unfortunately his understanding of the safety issue is wrong. >> >> Using an isolation tranny on the service bench all the time creates a false sense of security that could result in a fatal electric shock.Who needs isolation transformers on the service bench when servicing AC/DC radios or tube televisions ;-). Just make sure that you plug in the mains plug in the correct way so that internal metallic chassis is directly connected to the mains neutral wire. With the plug inserted the other way, you have direct 220 V phase voltage at the chassis.>> >> >> > In the video Harrison also reviews safety considerations >> > apropos to dropper supplies. >> > >> >> >> ** Rule 1: >> >> Never connect them to the AC supply plug earth pin unless you intend to kill someone.A Class II (double insulated) device never has a ground connection. It seems that the circuit diagram is incorrectly drawn.>> >> Ham radio guys should keep away from subjects they do not understand, which dos not leave much. >> >> >> .... Phil
Reply by ●March 9, 20192019-03-09
upsid...@downunder.com wrote:> > > >> > >> ** Unfortunately his understanding of the safety issue is wrong. > >> > >> Using an isolation tranny on the service bench all the time creates > >> a false sense of security that could result in a fatal electric shock. > > > Who needs isolation transformers on the service bench when servicing > AC/DC radios or tube televisions ;-). Just make sure that you plug in > the mains plug in the correct way so that internal metallic chassis is > directly connected to the mains neutral wire. With the plug inserted > the other way, you have direct 220 V phase voltage at the chassis. >** Unfortunately, most SMPS and the like have no link from supply neutral to circuit common - only floating the AC supply and linking the AC side common to ground internally allows free use of a scope to trouble shoot the PSU.> > >> > >> ** Rule 1: > >> > >> Never connect them to the AC supply plug earth pin unless you > >> intend to kill someone. > > > A Class II (double insulated) device never has a ground connection. >** 100% not true. The vast majority of domestic audio and video equipment is Class II insulated these days - HOWEVER the metalwork and circuitry become linked to ground in normal use by being interfaced with any non Class II item. The scope on your bench is one such.> It seems that the circuit diagram is incorrectly drawn. >** The one you can now see or the one that was made to vanish ?? .... Phil
Reply by ●March 9, 20192019-03-09
On Sat, 9 Mar 2019 01:34:29 -0800 (PST), Phil Allison <pallison49@gmail.com> wrote:>upsid...@downunder.com wrote: > >> >> >> >> >> >> ** Unfortunately his understanding of the safety issue is wrong. >> >> >> >> Using an isolation tranny on the service bench all the time creates >> >> a false sense of security that could result in a fatal electric shock. >> >> >> Who needs isolation transformers on the service bench when servicing >> AC/DC radios or tube televisions ;-). Just make sure that you plug in >> the mains plug in the correct way so that internal metallic chassis is >> directly connected to the mains neutral wire. With the plug inserted >> the other way, you have direct 220 V phase voltage at the chassis. >> > > >** Unfortunately, most SMPS and the like have no link from supply neutral to circuit common - only floating the AC supply and linking the AC side common to ground internally allows free use of a scope to trouble shoot the PSU.Yes, true for single phase full wave rectifier. Either use insulated, battery powered, floating test equipment, such as DVMs and battery powered oscilloscopes. Even better especially with higher voltage and higher power electronics, use voltage transformers (and current transformers) to bring the potentials down to a grounded test equipment.>> >> ** Rule 1: >> >> >> >> Never connect them to the AC supply plug earth pin unless you >> >> intend to kill someone. >> >> >> A Class II (double insulated) device never has a ground connection. >> > >** 100% not true. > >The vast majority of domestic audio and video equipment is Class II insulated these days - HOWEVER the metalwork and circuitry become linked to ground in normal use by being interfaced with any non Class II item. The scope on your bench is one such.Class II only refers to the mains connection, it does not require galvanic separation on audio, video or data connections. Isolation of external connections is required only if the internal circuits are forced to some dangerous (live) voltages, such as the mains phase voltage in a AC/DC device. For a tube TV, very few external connections were available, typically only an external speaker connection, since there were already an audio output transformer. Connecting an audio tape recorder would require an expensive adaptor (audio transformer), not to mention video connections, before multi-MHz optoisolators become available. Big isolated knobs were use or at least plastic potentiometer axes.> > > >> It seems that the circuit diagram is incorrectly drawn. >> > > >** The one you can now see or the one that was made to vanish ?? > > > >.... Phil > > > >
Reply by ●March 9, 20192019-03-09
On Saturday, March 9, 2019 at 12:01:26 AM UTC-5, Phil Allison wrote:> Don Kuenz is a Kunt wrote: > > > Phil Allison > > > > >> >> > > > >> >> > http://crcomp.net/electronic/securitylight/085-5411-MB.png > > > > >> >> > > >> >> ** Don't think so - no way that concoction could work or be safe. > > >> > It's a diode bridge with 24V zeners in half of the legs. > > >> > > > >> > The first cap needs to be robust.. I'd guess. > > >> > > >> Indeed. The dropper cap is rated at +250V. > > >> > > > > > > ** The cap is not shown - why ?? > > > > > > Active, Neutral and Earth are not shown - why ?? > > > > > > The dropper cap needs to be rated for AC volts, not just DC. > > > > > > The fact the circuit unit is "hard wired " to the supply is CRUCIAL too. > > > > > > > > >> You obviously see how the zener diodes do double duty. > > > > > > > > > ** What does the symbol on the bottom right of the schem indicate?? > > > > > > > > > > A very iteresting circuit, to those able to see it. > > > > > > > > > ** Shame you did not draw it correctly. > > > > Bear in mind that this is a reverse engineering work in progress. > > > ** I bear no such damn thing in mind since you did NOT mention it before. > > > > Additional labels are now present on the schematic. > > > ** That is the SLEASIEST thing I have ever seen anyone do on usenet !!! > > The bullshitting prick has posted a NEW circuit under that SAME address as the previse entirely faulty one. > > What a bloody deceit !!! > > Previous completely correct comments are now all rendered moot as no-one can see the old schem. >It's OK Phil... The first schematic was missing some crucial bits. (In particular the current limiting input cap and R) George H.> What a fucking cunt and ham radio asshole !!! > > > > > .... Phil
