TW Rocket build for son

[M Fowler]

I like that board thanks Dave.

[ampgeek]

Thank you!

Hopefully someone will give it a good once-over and let me know if there are any obvious errors/omissions.

Once it is "right", I can easily post up an inverted version for any other etching maniacs out there that want to give it a go.

I should mention that I have never done a high voltage board so no experience to fall back on here. I did a quick search regarding trace widths and it looked like 1.4 mm was adequate for 1/2 Oz copper clad in this application. Again, I hope that someone more experienced than I will weigh in with thoughts on that.

Dave O.

[mmcm4]

Working on a new board layout on my youngest son's Rocket putting the filter caps on the tone board. I don't like cap stacks. Components are close together but I don't think in a Rocket it will matter.

Mark

Mark,

Where did you get the turrets and board material? I'm about to start a Rocket Build and am in the process of sourcing parts.

[JoeCon]

MMCM4

I'd check out AES, I got mine there too.

http://www.tubesandmore.com/

[M Fowler]

Yes I get the boards from CED dealer division of AES.

I have seen then at Angela and Turretboards.com too I believe cheapest at AES for non dealers.

Turrets come in 2mm board length or 3mm board length.

Mark

[ampbldr2]

what is the software that pablogt used to create that layout?

[pablogt]

Visio 2007

Pablo

[Reeltarded]

THAT is a food idea.

[JazzGuitarGimp]

Thank you!

Hopefully someone will give it a good once-over and let me know if there are any obvious errors/omissions.

Once it is "right", I can easily post up an inverted version for any other etching maniacs out there that want to give it a go.

I should mention that I have never done a high voltage board so no experience to fall back on here. I did a quick search regarding trace widths and it looked like 1.4 mm was adequate for 1/2 Oz copper clad in this application. Again, I hope that someone more experienced than I will weigh in with thoughts on that.

Dave O.

Looks like I am a little late for the party. I just saw this post. Here are some thoughts, some of which you're likely aware of already:

The negative terminals of the three 47uF caps are tied together, but go nowhere else. You will want at least one more pad so that you can wire this node to chassis GND.

For power supplies, I prefer using as much copper as possible. While a 1.4mm, 0.5oz trace will safely carry 1.5 amps without overheating, its impedance won't be as low as a much wider trace. I like keeping the impedance as low as possible when laying-out a power supply section. Also, when dealing with high voltages, trace-spacing is just as important as trace width. I would recommend a minimum of 1.25mm space between nets, more if you can comfortably afford it. In my attached example, The smallest trace is 5mm wide (most are much wider) and trace to trace & trace to pad spacing for dissimilar nets is at least 3mm (in most cases, it's much more than 3mm). When laying-in large swatches of copper, it's best to thermally decouple the solder pads from the copper. To do this, a moat is used around each pad, with four spokes to traverse the moat and connect the pad to the copper. In this example, the width of the spokes is 0.635mm - multiply that by four, and you have the equivalent of 2.54mm trace width to the pad. Copper is a great heat sink, and soldering a component lead into a hole that isn't thermally decoupled from a large copper expanse requires a BIG soldering iron - and this is the reasoning behind using the moat with spokes.

I hope this sheds some light on the subject.

Kind regards,
Lou

[M Fowler]

Sorry I can't read red, white and blue

[ampgeek]

Thank you Lou! I was hoping that you, in particular, would spend a moment with that layout and provide your thoughts.

I see the wisdom in your suggestions and will attempt to incorporate same in my next stab at it.

BTW: The 47uf cap drain sneaks off of the board from the pad in the upper left corner of the board labeled "Gnd 1".

Again, thank you very much!

Sincerely,
Dave O.

[JazzGuitarGimp]

Thank you Lou! I was hoping that you, in particular, would spend a moment with that layout and provide your thoughts.

I see the wisdom in your suggestions and will attempt to incorporate same in my next stab at it.

BTW: The 47uf cap drain sneaks off of the board from the pad in the upper left corner of the board labeled "Gnd 1".

Again, thank you very much!

Sincerely,
Dave O.

Oops, you're right - GND 1 shuck right past me! You are welcome and, in the future, if you have something you'd like my input on, send me a pm with a link to the discussion in question.

CHeers!
Lou

[JazzGuitarGimp]

Thank you Lou! I was hoping that you, in particular, would spend a moment with that layout and provide your thoughts.

I see the wisdom in your suggestions and will attempt to incorporate same in my next stab at it.

BTW: The 47uf cap drain sneaks off of the board from the pad in the upper left corner of the board labeled "Gnd 1".

Again, thank you very much!

Sincerely,
Dave O.

Oops, you're right - GND 1 shuck right past me! You are welcome and, in the future, if you have something you'd like my input on, send me a pm.

CHeers!
Lou

[ampgeek]

Thanks mate! I truly appreciate that offer. I had considered that earlier..but...you know how it is..didn't want to impose on you with flak from a "stranger".

BTW: I recently invested in a nice, economical laminator for prototyping boards. Kicks the ass of the household iron method all over the universe!! Sure wish I had done that earlier.

Thanks again,
Dave O.

[JazzGuitarGimp]

BTW: I recently invested in a nice, economical laminator for prototyping boards. Kicks the ass of the household iron method all over the universe!! Sure wish I had done that earlier.

I'd like to see that. Can you provide a link please?

Many thanks,
Lou