Comments on: Kaizer SSTC II

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?

By: jogosa

jogosa — Wed, 02 Feb 2011 22:01:47 +0000

Thank you Mads. Already have both PCBs made, wondering whats the pulse width range on the timer…
By the way do you know an easy way how to make the topload?