Hi Chip,
I was wondering if any updates... have not heard anything from my initial
reply to your post. Understand if you are busy. Just wondering.
Anyways, I am pretty familiar with this circuit and others that are similar.
I have also modified this circuit a bit a while back. And another related
one just a little. These are in my blue enclosures. I also have a very
simple basic manual controller I put together a while back also.
Speaking of basic controllers, in the past few days off and on I have put
together 2 more. Just bench tested right now. Will be doing VTTC running
tests soon...to see if I failed or succeeded.
Anyways here is a picture of my collection of VTTC controllers.
https://photos.app.goo.gl/p9jpyod97xUi7UAi6
5 of them, with #6 in the works fairly soon I hope, which is based off the
original design but some "layout" differences.
All of these controllers have zero crossing detection. Some different than
others in how done.
I will be doing a new posting with pictures and maybe some video also
eventually after doing some real running on coil with all 5 current
controllers. Been a while since I have run the 304 VTTC so I want to run
them all. Coil actually has a slightly damaged secondary currently, but
still working ok with some losses...quite earlier this year I pushed it too
hard, during extreme testing I did. Windings "buckled" in a few spots. Got
too hot...the acrylic tube has warped some... Happens...not the first time
:^) I will be fixing soon with some more ideas for major changes to this
coil. I always seem to change this one around, testing/trying things.
Okay, enough rambling here...I will give more details eventually in a new
post.
And I will be waiting to hear if any progress/info/questions from you.
Have great Holiday everyone.
Chris Reeland
Ladd Illinois USA
Sent from my Samsung Galaxy Tab® S
On Wed, Dec 16, 2020, 1:00 AM Chris Reeland <chrisreeland@xxxxxxxxx> wrote:
> Hi Chip,
>
> I am giving a link to a couple of pictures.
> Are you getting anything that resembles these pictures. One picture is at
> minimum PW and the other is maximum PW.
>
> Could you take a picture of what you are seeing on your scope?
>
> Also could we get close up pictures of the whole topside and whole bottom
> of your circuit board. Can not guarantee, but we might be able to "see" the
> possible problem(s).
>
> Link:
>
> https://photos.app.goo.gl/yWdLGUTHY8EexVwL7
>
> And can you also maybe get a couple of scope pictures at a few different
> PRF rates?
>
> Kind of like this one picture of mine at a set rate:
>
> https://photos.app.goo.gl/TCE9wz5ZBKHeZhG9A
>
>
> Chris Reeland
> Ladd Illinois USA
>
> Sent from my Samsung Galaxy Tab® S
>
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