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Phil Allison <pallison49@gmail.com>: Nov 04 03:54PM -0800 Michael Terrell Scumbag troll wrote:   -----------------------------------     > The term is JEDEC.   ** So what.   > Can't you get anything right?     ** That the best you can do - fuckwit ?   Wot a stinking low life you are.     ..... Phil

Michael Terrell <terrell.michael.a@gmail.com>: Nov 04 09:36PM -0800 On Monday, November 4, 2019 at 6:54:24 PM UTC-5, Phil Allison wrote:   > ** That the best you can do - fuckwit ?   > Wot a stinking low life you are.   > ..... Phil   Yawn. You aren't man enough to ever admit that you're wrong, so you project all of your faults on others. Exactly what I expected from you.

Al Butterworth <emailrus@you.net>: Nov 04 02:24PM -0500 Looking for a source for getting NO diode embedded flybacks to be able to run multiplier circuits, etc. I am in the US. Thank you.   AB

"pfjw@aol.com" <peterwieck33@gmail.com>: Nov 04 12:22PM -0800 On Monday, November 4, 2019 at 2:24:59 PM UTC-5, Al Butterworth wrote: > Looking for a source for getting NO diode embedded flybacks to be able > to run multiplier circuits, etc. I am in the US. Thank you.   > AB   Would be useful to know desired operating voltages and so forth, but Mouser has a selection of low-voltage PCB mounted devices. Triad has a number of higher-voltage devices.   None of which have diodes installed.   Google is your friend.   Peter Wieck Melrose Park, PA

John Larkin <jlarkin@highland_atwork_technology.com>: Nov 04 01:26PM -0800 On Mon, 4 Nov 2019 14:24:55 -0500, Al Butterworth <emailrus@you.net> wrote:   >Looking for a source for getting NO diode embedded flybacks to be able >to run multiplier circuits, etc. I am in the US. Thank you.   >AB   Car ignition coil?   --   John Larkin Highland Technology, Inc picosecond timing precision measurement   jlarkin att highlandtechnology dott com http://www.highlandtechnology.com

John Larkin <jlarkin@highland_atwork_technology.com>: Nov 04 01:28PM -0800 On Mon, 04 Nov 2019 13:26:51 -0800, John Larkin >>to run multiplier circuits, etc. I am in the US. Thank you.   >>AB   >Car ignition coil?   LCD TVs don't need flybacks!   --   John Larkin Highland Technology, Inc picosecond timing precision measurement   jlarkin att highlandtechnology dott com http://www.highlandtechnology.com

Arie de Muynck <no.spam@no.spam.org>: Nov 04 11:56PM +0100 On 2019-11-04 20:24, Al Butterworth wrote: > Looking for a source for getting NO diode embedded flybacks to be able > to run multiplier circuits, etc.  I am in the US.  Thank you.   > AB   Something like this? https://www.aliexpress.com/item/32965980997.html Couldn't even buy the wire for that price...   Arie

AJ Butterworth <emailrus@you.net>: Nov 04 11:19PM -0500 > Would be useful to know desired operating voltages and so forth, but Mouser has a selection of low-voltage PCB mounted devices. > Triad has a number of higher-voltage devices.   > None of which have diodes installed.   Sorry, I was looking for something in the 20- 40 KV range like was found in CRT's. Probably 15-20 KV at some mA since I was going to use a 3-4 stage multiplier.

"Tim Williams" <tiwill@seventransistorlabs.com>: Nov 04 10:34PM -0600 "John Larkin" <jlarkin@highland_atwork_technology.com> wrote in message news:bu51set82p2fb790dq9nuger7bg94m6f4t@4ax.com...   >>>AB   >>Car ignition coil?   > LCD TVs don't need flybacks!     Who said anything about?--nevermind...   LCDs with CCFL backlights, though. Low power (10s W), high voltage capable (3, maybe 5kV peak?). Comes with resonant driver circuit, full wave, not flyback.   Tim   -- Seven Transistor Labs, LLC Electrical Engineering Consultation and Design Website: https://www.seventransistorlabs.com/

Steve Wilson <no@spam.com>: Nov 05 05:27AM > Sorry, I was looking for something in the 20- 40 KV range like was found > in CRT's. Probably 15-20 KV at some mA since I was going to use a 3-4 > stage multiplier. Look for a 4-cylinder wasted spark ignition coil. It has two independent high voltage flyback transformers. You can probably put them in series for higher output voltage.   They are inexpensive and available at most auto supply houses. For example, the ignition coil for a 2003 Ford Focus starts at $16.75 at Rock Auto:   https://www.rockauto.com/en/catalog/ford,2003,focus,2.0l+l4 +dohc,1431898,ignition,ignition+coil,7060

Bob Engelhardt <BobEngelhardt@comcast.net>: Nov 04 11:46AM -0500 > "Otherwise" would be non-resistive loads - which would be reactive (capacitance) loads, or inductive (Motors and such) loads. ...   Right ... I should have been more specific: what DEVICES would be reactive? Motors, but motors really don't like being run on variacs. Even universal motors are terrible at less than rated voltage. Assuming theatrical stage use makes it more mysterious as to what devices might be "otherwise".   > A Variac "sees" a resistive load as a constant, whereas reactive and inductive loads will vary, so the amount of current the variac "sees" may be greater than the constant load at onset, shutdown, or when the load varies. Hence the derating.   But even resistive loads, especially theatrical lights, have in-rush much higher that steady state. And a variac has a huge thermal sink to handle transients (this variac weighs 20lbs).   Maybe it's the high voltage kick on inductive turn-off that's the problem. The kick would be proportional to current, wouldn't it (more energy to dissipate)? Do motors show inductive kick on turn-off?   Another thought - Ward-Leonard's main business was motor controllers, So the theatrical use assumption may be wrong.

John Robertson <spam@flippers.com>: Nov 04 09:20AM -0800 On 2019/11/04 8:46 a.m., Bob Engelhardt wrote: > much higher that steady state.  And a variac has a huge thermal sink to > handle transients (this variac weighs 20lbs).   > ...   When I was one of the geeks working the theatre lighting at our high school in Toronto (Northern Secondary School - mid to late 60s) we used the large lever variac style dimmers to bring the lights up. The school had (as I recall) 2500 students and a huge auditorium with a great many row and spot lights for productions.   So the idea was you were supposed to bring the lights up, not in a switched on rush, but as fast as you would raise the lever - a second or two - which allowed for the filament to heat up a bit slower and saved replacement bulbs. There may even have been a minimum setting to act as a 'keep-alive' to preheat the filaments of the big spots - I just don't recall...   John :-#)#

"pfjw@aol.com" <peterwieck33@gmail.com>: Nov 04 09:33AM -0800 On Monday, November 4, 2019 at 11:47:31 AM UTC-5, Bob Engelhardt wrote: > Another thought - Ward-Leonard's main business was motor controllers, > So the theatrical use assumption may be wrong.     Keep in mind that the Kleig Light (Carbon-arc) and mercury-vapor lamps, some of which are dimmable to a point, are reactive loads. And, the Kleig light as stage lighting persisted into the 1970s on movie sets (with proper filtering against dangerous actinic wavelengths) and mercury-vapor devices are still used in some lighting designs. So, if a lighting device required a strike function, and repetitive in some cases, that would certainly de-rate the Variac as compared to a simple incandescent/resistive load.   Note also that brush-type AC motors may have variable speed controls - such as on your corded hand-drill. I can think of any number of devices that would use such a motor and also allow for the use of a large Variac. A theatrical variable wind machine comes immediately to mind.     Peter Wieck Melrose Park, PA

Phil Allison <pallison49@gmail.com>: Nov 04 03:43PM -0800 pf...@aol.com wrote:   -------------------   > When electricity flows through a circuit, there are points on the circuit, called loads, where energy is drawn away. Loads, in essence, are objects that use electricity--such as light bulbs. There are a variety of classification systems, but one way you can divide loads is into resistive, capacative, inductive or a combination of these types.   > So:   > A Variac "sees" a resistive load as a constant, whereas reactive and inductive loads will vary, so the amount of current the variac "sees" may be greater than the constant load at onset, shutdown, or when the load varies. Hence the derating.   ** ROTFL   The Weaky criminal fuckwit really needs to see a doctor.   His chronic verbal diarrhoea is getting very serious. The above is all complete DRIVEL.     > Peter Wieck     ** Wot a know noting, fucking idiot.   > Melrose Park, PA   ** Must stink up the whole neighbourhood.     ..... Phil

Phil Allison <pallison49@gmail.com>: Nov 04 03:47PM -0800 Bob Engelhardt wrote:   ----------------------   > I suppose "otherwise" means motors, but motors aren't usually run off > variacs. What else could "otherwise" be?   > Also, why only 14A?   ** The variac itself has no concern about the load other than the RMS current value. Cos that is what heats the windings.   Is there a switch on the unit ?   That part may be rated at 14A inductive due to potential arcing at switch off.     .... Phil

Phil Allison <pallison49@gmail.com>: Nov 04 03:52PM -0800 Bob Engelhardt wrote:   -----------------------   > Right ... I should have been more specific: what DEVICES would be > reactive? Motors, but motors really don't like being run on variacs. > Even universal motors are terrible at less than rated voltage.   ** What bullshit.   AC/DC brush motors respond beautifully to Variac control.   So do the motors in regular fans.   Go try it yourself sometime.       .... Phil

John Robertson <spam@flippers.com>: Nov 04 03:52PM -0800 On 2019/11/04 3:43 p.m., Phil Allison wrote:   >> So:   >> A Variac "sees" a resistive load as a constant, whereas reactive and inductive loads will vary, so the amount of current the variac "sees" may be greater than the constant load at onset, shutdown, or when the load varies. Hence the derating.   > ** ROTFL   ...   If Mr. Wieck is incorrect why not point out his errors instead of simply insulting him?   We all make mistakes, but only adults know how to correct, admit to, and deal with errors.     >> Peter Wieck   > ** Wot a know noting, f...   Let's get personal, eh? That works so well in a discussion.     >> Melrose Park, PA   > ** Must stink up the whole neighbourhood.   > ...... Phil   Sheesh...   John :-#(#

Phil Allison <pallison49@gmail.com>: Nov 04 04:03PM -0800 John Robertson wrote:   ----------------------     > > ** ROTFL   > If Mr. Wieck is incorrect why not point out his errors instead of simply > insulting him?     ** What he posted is way beyond mere correction.   The guy is a deranged old cunt with a vile attitude. He only ever responds to correction with malicious jibes at me.     > We all make mistakes,   ** Some folk make nothing but mistakes.   Known usually as "bullshit artists".   Weaky is a monstrous example.   Be fighting with him for almost 20 years.       > > ** Wot a know noting, f...   > Let's get personal, eh?   ** I want the asshole gone - ASAP.   His bad advice ruins other's attempts to post good advice.       > > ...... Phil   > Sheesh...   ** You are one grade A, narcissistic dope - pal.     ..... Phil

Bob Engelhardt <BobEngelhardt@comcast.net>: Nov 04 07:28PM -0500 On 11/4/2019 12:20 PM, John Robertson wrote: ... > switched on rush, but as fast as you would raise the lever - a second or > two - which allowed for the filament to heat up a bit slower and saved > replacement bulbs. ...   That makes sense, thanks.

Bob Engelhardt <BobEngelhardt@comcast.net>: Nov 04 07:35PM -0500 > Keep in mind that the Kleig Light (Carbon-arc) and mercury-vapor lamps, some of which are dimmable to a point, are reactive loads. And, the Kleig light as stage lighting persisted into the 1970s on movie sets (with proper filtering against dangerous actinic wavelengths) and mercury-vapor devices are still used in some lighting designs. So, if a lighting device required a strike function, and repetitive in some cases, that would certainly de-rate the Variac as compared to a simple incandescent/resistive load.   I never would have thought of them as reactive, but it's interesting.   > Note also that brush-type AC motors may have variable speed controls - such as on your corded hand-drill. I can think of any number of devices that would use such a motor and also allow for the use of a large Variac. A theatrical variable wind machine comes immediately to mind.   My limited experience with single-speed universal (brushed) motors is that reducing the voltage reduced the speed, but also the torque. To an extent that it was not useful.

Phil Allison <pallison49@gmail.com>: Nov 04 05:18PM -0800 Bob Engelhardt wrote:   --------------------   > My limited experience with single-speed universal (brushed) motors is > that reducing the voltage reduced the speed, but also the torque. To an > extent that it was not useful.   ** No so.   Torque is proportional to current draw, which depends in turn on the load applied. Brush motors have a max current limit beyond which the com begins to burn.   So the applied voltage can be well below the rating and the torque available remain the same, but at a lower rpm.   A triac controller does a good job too and SCR ones have back emf ( ie speed ) feedback that is very useful.   Induction fans can be varied from full to just ticking over with Variac.   The usual speed controls use series switched inductors or capacitors to drop voltage.     ...... Phil

tabbypurr@gmail.com: Nov 04 08:29PM -0800 On Tuesday, 5 November 2019 00:04:02 UTC, Phil Allison wrote:   > ** You are one grade A, narcissistic dope - pal.   I doubt you have any pals here.

tabbypurr@gmail.com: Nov 04 08:35PM -0800 On Monday, 4 November 2019 15:19:00 UTC, Bob Engelhardt wrote:   > suppose "otherwise" means motors, but motors aren't usually run off > variacs. What else could "otherwise" be?   > Also, why only 14A?   Fluorescent lighting was also pf not 1. We had a lot of fl lighting on a big variac. It had standard electromagnetic ballasts, and contrary to oft stated opinion it did dim well enough - we knew to not keep it running dimmed, and it blacked out at a low light level, it wasn't perfect but certainly good enough.   Discharge light sources were always pf not 1 in the pre-electronic days, whether fluorescent, carbon arc or mercury vapour. i was never proportional to v with them, and in most cases the ballasts were inductive not resistive. And of course projector carbon arcs ran through mercury rectifiers to give asymmetric electrode heating to minimise the light source size.     NT

Jim Horton <jhorton@nospam.net>: Nov 04 01:34PM -0500 > Or, isopropyl alcohol - anything over about 6% will inhibit mold as well. You may use alcohol on natural (cellulose) fiber sponges.   > Peter Wieck > Melrose Park, PA   Thanks for the tip. Not exactly sure what the blue material is, but this is it:   https://tinyurl.com/yynztlxp   Synthetic is in the description, so looks like your recommendations would work.

Clifford Heath <no.spam@please.net>: Nov 05 08:48AM +1100 >> Don't want to trade filtered air for mold!   > If you are using synthetic sponges for the filters, add a tablespoon of bleach to a pint of water - no mold.   > Or, isopropyl alcohol - anything over about 6% will inhibit mold as well. You may use alcohol on natural (cellulose) fiber sponges.   Borax is a good anti-fungal too.

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