Comments on: Kaizer SSTC II

By: ALLAN

ALLAN — Sat, 19 May 2012 21:03:38 +0000

Hi good work very nice coil, My question is what is the diference between SSTC and DRSSTC? because I see to bridge LC system in the primary coil similar to used in DRSSTC? and when you used interrupter is very similar the sparks form, I will like make DRSSTC but I dont have IGBT do you think is possible used bridge of IRFP460 with low power? thanks.

By: Mads Barnkob

Mads Barnkob — Tue, 30 Aug 2011 20:57:46 +0000

Hey Radek

I used a toy keyboard with the volume at max, you might need a amplifier inbetween to get good results for a unamplified signal.

Kind regards
Mads

By: Radek

Radek — Mon, 29 Aug 2011 19:29:44 +0000

Hi Mads
What amplitude of audio input woltage should I give to get any effect for audio modulation? I have maked this, but after giving it about 0.5V audio signal(max) from mp3 player there are no signal from it. I have builded simmilar audio modulation for SSTC on TL494, but with same effect.
Sorry for my poor english.

By: Mads Barnkob

Mads Barnkob — Wed, 24 Aug 2011 20:19:02 +0000

Hello James

Increasing the number of windings on the secondary will only have a slight effect compared to higher bus voltage.

Increasing the bang per second rate of the interruptor will for a SSTC only result in thicker sparks, not much longer.

You should look up how to make a voltage doubler and add that to your circuit.

Kind regards
Mads

By: James

James — Tue, 23 Aug 2011 16:16:19 +0000

Hello,

I will be using the same components that you have listed but in North America we only have 120 VAC. What can I do to get the same HV output as your SSTC? ie increase the number of windings or increase the base frequency of the 555 timer?

By: jogosa

jogosa — Tue, 15 Feb 2011 19:47:37 +0000

Hi again, Mads

I have already made and tested the driver circuit, and everything is working except that the transistor Q6 goes hot after a few seconds. Is that because it dissipates too much power when its switched on? Maybe I should use higher value for R14 ?

I tested it with 1kHz 900mV sine input the transistor gives me a square wave on the collector…

By: jogosa

jogosa — Thu, 03 Feb 2011 23:34:34 +0000

OK, thanks for the help..

By: Mads Barnkob

Mads Barnkob — Thu, 03 Feb 2011 19:37:14 +0000

The coupling coefficient is a number representing the proximity of two coils, the lower the number the further the coils are from each other, at a coupling of 1 the two coils would occupy the same physical space, which is of course impossible in practise.

Read my article in order to see a easy to make topload.

The coupling for a SSTC will be too low with 30 mm between the coils, again look at my article.

By: jogosa

jogosa — Thu, 03 Feb 2011 18:38:26 +0000

Will it be OK if I use 110mm diameter PVC pipe for the secondary and 160mm for the primary coil?

By: jogosa

jogosa — Thu, 03 Feb 2011 13:24:39 +0000

Also as you said about decreasing coil coupling, did you meant putting the coils closer?