Joulethief SEC exciter and variants

[slayer007]

Good video. I was surprised that the frequency was that high. Maybe if we tweek the circuit a bit here and there we can get the performance even better. I am guessing that the the coil with the ferrite rod is where the antenna coil is shown in the diagram? I tried putting a Dr. Stiffler SEC tower there and got nothing. I guess it is all in the tuning as Doc always said.

Lidmotor

yes the coil with the ferrite rod is the antenna coil.

Both coils are around 80 turns of 26 awg.
The primary coil is 21 turns of the 21 awg plastic coated wire.

[Lidmotor]

New Exciter ???

Thanks to Lidmotor and Kooler for there videos.

This is a video of a Hartley Oscillator Replication.

In the video I show it running off 1.5v 6v and 12v.And lighting nine leds all in series.

Performance still needs some work but it is a very interesting circuit.

YouTube - Hartley Oscillator Replication

Good video. I was surprised that the frequency was that high. Maybe if we tweek the circuit a bit here and there we can get the performance even better. I am guessing that the the coil with the ferrite rod is where the antenna coil is shown in the diagram? I tried putting a Dr. Stiffler SEC tower there and got nothing. I guess it is all in the tuning as Doc always said.

Lidmotor

[slayer007]

Thanks to Lidmotor and Kooler for there videos.

This is a video of a Hartley Oscillator Replication.

In the video I show it running off 1.5v 6v and 12v.And lighting nine leds all in series.

Performance still needs some work but it is a very interesting circuit.

YouTube - Hartley Oscillator Replication

[ricksl]

skywatcher im willing to bet you it is the feedback that goes into the batteries during operation, similar effects take place in dr. stifflers setups were a good amount of alternating current is actually present in the powered lines from the battery, thats the reason meters fry (when in series) its because of the feed back pulses. This is also the reason the battery terminals are very hot when you use an av plug and led to test for fields, of course the area of excitation plays a role too from just being a metal mass, but this causes it to a greater extent. This can also be bad for the batteries if you plan to use these configurations for extended periods of time.

so with a .001 volt drop over a 1 ohm resistor there is a milliamp of current being pushed back into the battery at... i think it was fm frequencies these oscillate on right? ive been meaning to make that source isolator (best way i can describe it) device that filters feedback from the rails, but i am adamant against ordering things online.

best of luck with your tuning i know that caused me grief.

[totoalas]

On a lighter side

Slayer ckts are becoming more compact
thanks to gbluer Lid and jonny and the rest

Will start soon on replicating these coils after my mentor finish winding my order lol

cheers
totoalas[IMG] Uploaded with ImageShack.us[/IMG]

[jonnydavro]

Mini Slayer ferrite exciter

Hi Great too see all the mini slayer exciter coil experiments and I would like to share with you mine which I made a fair while ago but got weigh leighed on some other projects but I have found that the output can be extremely high and easily light cfl's and tubes.
I found that to get a high output from a very small coil,you need to increase the inductance of the circuit as the small amount of wire used,may not be sufficient so i inserted a ferrite rod from a loopstick ariel and this transformed the circuit.
Lidmotor has done this with a larger L2 a while back but for a very small L2,ferrite is vital.
The circuit is completly dead output wise without the ferite rod although the circuit is drawing current and if anyone has built one and it seems dead,try inserting a ferrite and it may increase the output of your working coils too.
The circuit was running on 4.5v @ 60mA using a BC182 transistor but will run on lower or higher voltages.The L2 is 4 turns of solid core bell wire.The L1 was either 28swg or 30swg,wound onto a 90mm x 15mm solder tube as a former.The start resistor is 24k,left connected.
Here is a vid and pic.Hope this helps and great work everyone.Jonny
Here is a vid of it running.
YouTube - Mini slayer ferrite exciter

[SkyWatcher]

Hi ricksl, thanks for the info, yes i forgot about that method.
at 12 volt input, I used a 1 ohm to check it, problem is it shows .011 volts with volt meter one way, then when i alternate meter probes it changes to .001 volts. not sure what is accurate.
Hi slayer, thanks for the tips. I connected another diode plug off the collector and it is charging a couple AA's, though not sure how much charge it's imparting.
Last night at 24 volt input, i let the smoke out of the 2n4403, nasty smell.

It fried because i was adjusting the pancake coil position and that seems to cause an issue with the oscillation and caused massive heat in the transistor and poof, smoke cloud.
These circuits sure seem finicky, maybe I'll make a larger 1" diameter L1 that will fit inside this pancake coil i just made, seems the larger coils have more output for less voltage input.
peace love light
Tyson

[slayer007]

Also one thing I noticed with these very small coils at higher frequencies.

If you connect an AV plug right off the collector of the transistor.And measure the current and voltage across the AV plug.

You will notice there is a lot of voltage and current across the AV plug that can be used to recharge other batteries or caps.

This will not affect the light output or current intake at all.

[slayer007]

Hi folks, well I was able to get slayers small exciter working on 12 volts.
I used a 2n4403 PNP transistor
1 mega ohm base resistor
and used the diode plug, the small glass diodes, to power an led to to probably 20% full brightness.
When placing a small capacitor across L2, it does lessen the external field, though the led gets dimmer and transistor heats up.
Though without cap the led is brighter and the volt meter is all over the place when measuring the battery voltage.

At 24 volt input, i can light an led and light a small fluoro bulb to 1/4 brightness.
Not sure the amp draw, though the battery doesn't really go down if at all when checking with circuit off.

Maybe slayers setup is at a sweet spot of coil ratio as someone said.

Not sure how you got 9 leds in series to light up that bright slayer, though i am using 24 gauge for L1 and 18 gauge for L2 so that may have a bearing on it.
I'll continue to try and see what i can do with this, any tips would be appreciated, thanks.
peace love light
Tyson

You may want to solder your leds in series on a pcb board.

The breadboard might hinder your performance with the extra mass.

[ricksl]

hey skywatcher just a suggestion on measuring amp draw- use a 1 ohm resistor in series with the battery, and just measure the voltage drop across the 1 ohm resistor. For some reason you have to re tune the exciter if you just hook up a multimeter in series with the circuit (i think it has something to do with the internal resistance of the multimeter)- that and i blew a multimeter from the RF feedback because i don't have a filter.

i have really been meaning to make a full sized exciter- been playing with the stiffler stuff and having some fun, but the slayer exciter seems more fun to play with. quick note- ksp 2222a transistors work great but they get kinda hot

[SkyWatcher]

Here is a pic of it running at 24 volts



Uploaded with ImageShack.us

[SkyWatcher]

Hi folks, well I was able to get slayers small exciter working on 12 volts.
I used a 2n4403 PNP transistor
1 mega ohm base resistor
and used the diode plug, the small glass diodes, to power an led to to probably 20% full brightness.
When placing a small capacitor across L2, it does lessen the external field, though the led gets dimmer and transistor heats up.
Though without cap the led is brighter and the volt meter is all over the place when measuring the battery voltage.

At 24 volt input, i can light an led and light a small fluoro bulb to 1/4 brightness.
Not sure the amp draw, though the battery doesn't really go down if at all when checking with circuit off.

Maybe slayers setup is at a sweet spot of coil ratio as someone said.

Not sure how you got 9 leds in series to light up that bright slayer, though i am using 24 gauge for L1 and 18 gauge for L2 so that may have a bearing on it.
I'll continue to try and see what i can do with this, any tips would be appreciated, thanks.
peace love light
Tyson

[slayer007]

Hi slayer, thanks for the information.
I don't have a variable capacitor so I'll use regular caps to tune i guess, is a variable cap needed or can one tune without it, thanks.

I finished my pancake coil, it has 17 turns and is 3" in diameter.
peace love light
tyson

Using this small of a coil I couldn't get it to start without the variable capacitor.

But you may have better luck then I did.

You might want to try some very small caps around 5 to 10 pf if you can't find a variable capacitor.

[SkyWatcher]

Hi slayer, thanks for the information.
I don't have a variable capacitor so I'll use regular caps to tune i guess, is a variable cap needed or can one tune without it, thanks.

I finished my pancake coil, it has 17 turns and is 3" in diameter.
peace love light
tyson

[slayer007]

Hi folks, Hi slayer, thank you for sharing your latest creation.

Could you please tell me in which position the 512 pf capacitor is in this latest circuit.
I see two of your schematics, one has a cap in series with the base and the other has it in parallel with L2, thanks.

If you could also please tell me what the pot type device is that you are turning in this last video, thanks.

I am almost done building my small exciter like yours.

L1 is on a 1-1/4" diameter tube X 2-3/4" length using 100 turns of 24 gauge.
L2 is so far 10 turns of 18 gauge pancake coil, though will probably be like 14 turns.

These pancake coils are a real pain to make, i used masking tape, sticky side up and glued that to a piece of cardboard i cut to shape, though masking tape is not quite sticky enough to hold 18 gauge in place good, so a few dabs of superglue helps.
peace love light
Tyson

Hello SkyWatcher.

That was the variable capacitor I was using across the L2 coil to tune it.
The capacitor reads 0-512 pf.