Akula0083 Light No3 - Dual TL494

[JohnnBlade]

would help to know where your scope was...

 
Dally project (kapagen thing) used a tl494 as its base driver also...


from those experiments,I find the best usage is to generate the shortest pulses that reach peek voltage a little and then drop off... this will be the lowest current draw; the lowest frequency that it can work at is also best, more ticks is more times current will flow.


If you have the duty cycle set to near 0.01% like... as you increase the frequency, you will have to lengthen the duty cycle to maintain ability to hit peek drive voltage

Sofare with both of my devices it depend on what pulse you use, the smallest might not mean that its the best, sometimes its in between, cause the amp on output changes, even when its small pulses

only funny thing is is that load affects the input, while normally it doesnt with my other device

but what i find interesting is that as soon as 2 harmonics come close to eachother they melt together automaticly even when tuned a little off, from there it takes over by itself.

all im checking now is the behavior of this device and comparing it to the behavior of my ACMMJB.

maybe of interest to someone, when i measure the ohms on 1 cm on the ferrite its about +-220ohms when under load, with no power the ohm is about 180ohm per cm on the ferrite

Nothing special, but just sharing: https://www.youtube.com/watch?v=cd-aehFjV5I

btw i have to mention that the led is connected to the 19 turn on the ferrite, and the bulb is connected to the 12 turn on the ferrite

Greets JB

[JohnnBlade]

Hello All,
I hope this helps.

Hi Madsatbg,

What app did you use to draw that circuit pcb?

Greets JB

[MenofFather]

In output this lantern of Akula is sine in sine he says.
On one transistor (probarly were low frenquency) is varistor, akula says that it needed then ajusting only, then ajust, then it can be removed. I now listening conferences with akula.

[madsatbg]

Hi JohnnBlade,


I use Sprint layout 5.0.
The original file have extension ".lay".
Software does not allow to attach the extension.
Give me your email, I will send him.

regards

[JohnnBlade]

Hi All,

I made some scope shots from the output of the ferrite core.

Could someone let me know which pic is the most relevant and why?

If you need more info let me know

Greets JB