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[Mk1]

@yucca and xee

Thank guys !

Mark

[jeanna]

...They are either not used or are additional pickup coils that are used for some function in the TV set. The advantage of the flyback is that it has a very large number of turns with high voltage insulation for the main pickup coil. You could make the same thing on a toroid if you could get that many turns on the toroid.


EDIT: remember, the Fuji is not a toroid either, but it works like a toroid transformer.

Ah, I see.
thank you,
jeanna

[Yucca]

@mk1, forgot to mention, if you think you find the HV return then also check it for isolation from all other pins, if it's standalone then its definitely it. when mapping it just make sure you use a low current source of no more than 6V but more than 4V.

@all
be careful with these at higher drive levels or even at lower drive levels if you start charging HV caps. Left hand in the pocket when working on this stuff is always a good habit to get into even if it is a bit annoying.

[innovation_station]

much like tube amps eh yucca... 

1 hand in the pocket!!

i dont know what your all playing with but why not use the 5kv flyoff  or the 30kv flyoff 

i have taken flybacks apart b4 ...  and they are a treat!!   

there are hv caps in them and hv diodes...   so dont touch it!! 

i dont see why you couldnt use this as a supply for the MAC  coil ... 

same darn thing...   

basically you fill up the cascade ...  only 10% can drain through the gap ...  so your only ever filling 100% the first time ... then you only replace 10 % in each pulse....  but getting the speed and voltage of 100% ALL THE TIME...

same as my pulse motor that accelerates ...  the more i take from it the faster it will run..
the distance of the gap sets your timeing ...

o the million ways to do it ..  but right what are you doing ..  harvesting the kick ...  every tube tv operates like this by original design ...  overunity right out of the factory ...   same with tube amps ...

i have a big tube amp ...  a few hundred watTs  hifi  up to 32ohm and down to 2ohm ...  the thing weighs bout 50lbs ... it has the amp built in it and 2 aux power pluggs too ..... 

and the darn thing runs on a wire thinner than my head fones ..  that plugs into the wall ... 

i saw it and said ...  no way in heck it is drawing all the supplyed power from the ac mains through that TINY CORD...   

of course not ....  ITS OVERUNITY FROM FACTORY TOO.... 

LOL

IST!

[resonanceman]

@ Mk1

I hope you have better luck than me in figuring out which pin goes where. I bought one like Yucca's because he had already done that. I always ended up very confused when I tried to work it out.

Xee

I  just   check for continuity between all the pins.

I use  a marker  to mark  the  pins  that have continuity .

Then I  check for  resistance.

The   winding  with the lowest  resistance should  be used  for transistor  base .

If you have continuity   between  more than  2 pins  you  may  be able to   use a pin  as a center tap  ........


gary


Edit

I just  looked at my  flyback transformer   again
I made a mistake  on  my last  post .

I  have the    JT  connected to  pins 1  3 and 4      pin 3 is  like  the  wires twisted together on a normal JT   
My secondary is   pin  10  and   the HV  wire

[xee2]

@ resonanceman

I  have the    JT  connected to  pins 1  3 and 4      pin 3 is  like  the  wires twisted together on a normal JT   
My secondary is   pin  10  and   the HV  wire

Great. It seems you have something working. Are you biasing with a single base resistor? What are you using for power supply? Yucca said he had problems hooking it directly to a power supply. Have you tried that?

[resonanceman]

@ resonanceman

Great. It seems you have something working. Are you biasing with a single base resistor? What are you using for power supply? Yucca said he had problems hooking it directly to a power supply. Have you tried that?

Xee

I have not  done much with  my flyback JT  for  a few months .

The  picture  is my  flyback JT  driving  my 90 LED array
As  you can see  I am  using one  AA battery ..

I have also  lit  a CFL with it ..... is  I think  25 watts .......  it is  supposed to  replace  a 100 watt  bulb.    It lights to about half  brightness with one  AA.

I  stopped   using  this   JT mostly  because  I   burnt  up  enough  stuff for a while .

I  tried  using an ignition coil   for flyback   with this   JT .......  it worked well  .......I did not   burn up my  array .......but  I did  hear  a sparking  sound ......then noticed that  where  2 wires  of my alligator  clips   crossed ......the  electricity  would arc right  though the insulation .
I think the only  thing that  saved my array  was  that I left  the electronics   on it ......  these particular  electronics   allow it to light  very easily   and   lights the LEDs dimly at low  power .   The newer   units don;t  do this .   
I think  the caps in the  electronics  buffered  the  HV pulses   and protected the  LEDs.


About the  base resistor .
I made  up  a board   with   connections   for a  3055  transistor  and a pot .
I have used this  board for almost all my JTs for months .


gary

[xee2]

@ resonanceman

I made  up  a board   with   connections   for a  3055  transistor  and a pot .
I have used this  board for almost all my JTs for months .

Thanks.

I measured spikes over 200 volts between collector and emitter on my circuit (lights 2 neons in series but not 3 in series). This is well above the spec for the 2N3055. But, I guess it is OK to use a 2N3055 since you have not had any problems. That is good news since they are easier to get than the MJE13007.

[resonanceman]

@ resonanceman

Thanks.

I measured spikes over 200 volts between collector and emitter on my circuit (lights 2 neons in series but not 3 in series). This is well above the spec for the 2N3055. But, I guess it is OK to use a 2N3055 since you have not had any problems. That is good news since they are easier to get than the MJE13007.

Xee

I have not   had any problems  with this  basic  setup ......but when I  added  the ignition coil   for flyback    I burnt  up  a 3055  and a 60 LED array  and  damaged  a DMM.

I think it  is  pretty safe .
Are you sure you are measuring  across the   collector and emitter ?  Are your neons  in the   original  JT LED position ?
That  sounds  like   secondary  voltage to me .
The primary  runs at much lower  voltages

gary 
gary 

[xee2]

@ resonanceman

Are you sure you are measuring  across the   collector and emitter ?  Are your neons  in the   original  JT LED position ?
That  sounds  like   secondary  voltage to me .

It is not the pickup coil voltage, that goes over 1000 volts.  It is between collector and emitter in the normal JT diode location. I usually do a quick check just to see how close I am to the spec. The 2N3055 seems to be very hardy.

[nievesoliveras]

Jesus

My  flyback  transformer JT is  a little  bit simpler than yours .
I use pins  1  3 and 10
They  are  hooked up  exactly like  a  regular jt .
The  3 pin is  hooked up  as if it was the  start and   end that  are  twisted together  on  a regular  JT.

gary

I think that I made a mistake thinking that changing the @xee2's connections will change the performance.
I now see that it does not matter because there are 2 wires tied together always.

@ nievesoliveras

      There is no need to reverse pins 2 and 9, they are tied together. The circuit you posted is not better. Build it and you will find out.

You are completely right! I just noticed it after posting. I could not get back to the posting on time to put it out. I have been having troubles connecting to the internet for almost 2 days now.

Jesus

[xee2]

To anyone thinking of using a flyback transformer:

I know this has already been said, but it is worth saying again. These things are extremely dangerous. Yucca was putting in 10 watts of power (20v @ 500ma) and in my experience the JT is about 10-20% efficient. Thus, even at 10% efficiency he had over 1 watt of power coming out at more than 10,000 volts. This is VERY DANGEROUS.

[innovation_station]

To anyone thinking of using a flyback transformer:

I know this has already been said, but it is worth saying again. These things are extremely dangerous. Yucca was putting in 10 watts of power (20v @ 500ma) and in my experience the JT is about 10-20% efficient. Thus, even at 10% efficiency he had over 1 watt of power coming out at more than 10,000 volts. This is VERY DANGEROUS.

i fully agree .....

BE WIZE....  this is the reason it is scartered on ou ...    it can be fatial ....

so please ...  go slow and stay safe ... 

i guess you all know why i never built some of my crazy designs ... SAFTY FIRST ... learn  test prove then build ... it would have been nice to be funded but ... 

now its too late ...    cuz ill do it all by myself ... if i must!!!

so im building things JUST A LITTLE BIT DIFFRENT ...    SAME OLD TRICKS ...

but i will do it mechanically to avoid stupid problems .. plus this silly world can understand them much easyer as you can see it spinn.....   shusssssh   dont tell anyone you just remove the rotary parts ... lol

i will atempt to tap MANY HORSE POWER FROM SOME OF MY BIGGER DESIGNS ..

i will try to get 200lbs of material spinning at 1500 + rpm ... from a pulse motor 

im not sure the equasion any more ... but who cares ...   i think with the tesla turbine ..  @2000 rpm 10lbs would be putting out 200hp

do not quote this it has been years since i checked into this ...  sheesh the stuff that has flowen through my mind since then is unreal!!

there is no reason it will not power an entire house.. plus when it breaks down cuz things always do ... it will be easly repaired ...

no guessing wich chip blew up ... 

ist!

[resonanceman]

I found  one of the  LED arrays online that I  got at walmart .

http://www.lightsofamerica.com/Products/7200-LED-BN.aspx

This  array only has  24 LEDs ....... I am pretty sure that they are straw hat  LEDs
This array is listed at 2.5 W  but  it puts out  close to the  same amount of light that my 60 LED array puts out .
The  60 LED array is listed at 3.5 W

Both  lights    say Lights of  America on the package .
I have no idea why  the  floodlights   are not  listed  online .


The  straw hat array  seems  to be harder to light .
By that I mean it  takes more to get it going .
My  60 Led array  will  light up   at a  lower  voltage than  the straw hat  LEDs
My 90 LED array  will light up  even lower than that ......with the  original  electronics sill intact .    At  very low  power  most of the LEDs  don't light up .....some light  dimly .....some glow purple .


gary

[stprue]

Has anybody actually tried this?

http://www.youtube.com/watch?v=JfaMCOMuWl8&feature=related