<div dir="ltr"><div>Thanks for pointing out the small via and acid trap, Vesa. I do not understand your comment about no thermals on the pads. Can you or someone else briefly describe what that means?</div><div><br></div><div>Ingo, I thought that I need all of my grounds connected to the center tap. If I separate them, the capacitors will form a "new" virtual ground for the DC output side? Correct? Makes sense to me, I think. Sorry, I have been studying electronics for a few years now and I still have much to learn. (I'm doing pretty good though I think.) Thanks for pointing out about the input power going to cap and then rectifier also. I had not considered that the order would make any difference, but again, that makes sense to me when you mention it.<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Feb 8, 2020 at 10:49 AM Ingo Debus <<a href="mailto:igg.debus@gmail.com">igg.debus@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
> Am 08.02.2020 um 16:29 schrieb Vesa Lahteenmaki <<a href="mailto:vjhl2000@hotmail.com" target="_blank">vjhl2000@hotmail.com</a>>:<br>
> <br>
> No thermals on any pads connecting to the ground plane ? Soldering nightmare.<br>
> <br>
<br>
It's hard to tell, but as far as I can see there are thermals.<br>
<br>
I’d keep the ground traces from the center tap of the transformer to the electrolytics C1 and C2 separate from the ground plane. These traces carry all the ripple current. You don’t want that current in a trace that is used for anything else. Also, for the negative supply, the trace goes from the rectifier directly to the regulator and from there to C2. I think it’s better the other way around: go from the rectifier to the cap and from there to the regulator. This way the regulator get a nice clean supply.<br>
<br>
Ingo<br>
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