Regeneration and the Toroidal Power Unit

[turbo]

yes i have but i will need to get it out of the box 
as you might know i hate scopes..
and i need to install the software ,but i will give it a go 

Marco

[z_p_e]

Darren,

It's 50 mA, not 5 mA.

How did you measure the current being supplied?

5mA supply seems very low.

I measured the voltage with a voltage meter WHEN OPERATING.

I measued the amps with the same meter BEFORE it gets to the smoothing capacitor, so inbetween the transformer (which has its own smooting cap inside) and my smoothing cap.   With a scope, the voltage is a SOLID LINE, no fluctuations, so it's very accurate !!!

Why do you want to know the base voltage waveform?  I was showing that in one of my videos.  Have a look, it's somwhat sinusoidal, but its a composite of the different picewise segments representing the stages of operation: rampup, discharge, etc..


EM

Sorry, I got my decimal places confused. Anyway, 50mA seems more reasonable, but it still may not be correct if I understand your measurement.

So if I understand correctly, you placed the ammeter in series, and monitored the voltage with the scope while reading the amps?

If so, then this could be giving you false readings..why?

You know that measuring a voltage from a supply does not indicate current levels being supplied. The voltage does not have to drop to indicate current is getting used.

What needs to be measured is the current, and I wouldn't trust a meter with anything other than 60Hz sines, or straight DC.

Since you are measuring a pulsing circuit, the current supplied will be pulsed as well, and one accurate way to measure this is with a series shunt, and scope. A meter is no good here.

Also, you did not mention if the ammeter was set to DC or AC amps. That will make a marked difference as well.



I got about the same for your output calculation.

Check the input power a little closer, and I think you'll find it's higher than what the meter is reading. 

Darren

[giantkiller]

and then we have this verry strange thing....

Phase cancellation.

--giantkiller.

[giantkiller]

TPU2-4A - I'm certain this is a fluorescent light starter. See attached composite image.

This is a quote from how stuff works:

"The glow tube incorporates a switch which is normally open. When power is applied, a glow discharge takes place which heats a bimetal contact. A second or so later, the contacts close and provide current to the fluorescent filaments. Since the glow is extinguished, there is no longer any heating of the bimetal and the contacts open. The inductive kick generated at the instant of opening triggers the main discharge in the fluorescent tube. If the contacts open at a bad time, there isn't enough inductive kick and the process repeats."

As SM says you start off with one kick which then builds into many thousands of kicks. This is the ideal component to generate the starting kick. 9volt battery goes to the starter and then to a coil of fine wire (with say a magnet core) - the collapsing field generates the first kick that starts everything off.

A teeny, tiny spark gap. There are also two on the back of the SM17 in a fuse package.

--giantkiller. Hmmm...

[turbo]

well i tried to get is as clear as possible and this is what it gave me...
Marco.