Homebrew PCBs

On Thu, 17 Mar 2016 16:32:34 +0100, you wrote:

>Are those boards gold plated or something???
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>$400.00 sure that'snot a typo???

I think what they're doing is taking G10 and laminating the copper
directly on it, a one-of custom job.  

That's for bare boards, not even made and drilled.  I think he's going
to have to make those boards himself.  I'd be tempted to do
photoresist and the original negatives *if* I had the process down and
working to my satisfaction.

Toner transfer may or may not give the same look and feel, although
that could be debated.

What I would certainly do is make at least one with conventional FR4
just to see what it looked like.  It probably will not be exact, but
it would be a good test of the design.

Then I'd start working on the boards.  If I remember it properly, the
average board was 0.062 in thickness, with some of the backplanes
being about .125 or so.  It depended on what was attached to them and
how much flexing was tolerable.

I've got board stock from that era, but most of it is about 4 by 5 or
so, and I have no idea if it's G10 or not. Likely it's FR2 or 3.  How
might I tell?  If I had the stock in the right size, I'd be happy to
give you some (for postage).  

Harvey


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>cb
>On 3/17/2016 3:57:52 PM, Stefan Trethan stefan_trethan@... [Homebrew_PCBs] <homebrew_pcbs@yahoogroups.com> wrote:
>\ufffd
>I didn't follow the conversation before, but $400 for a couple pieces regular FR4 seems pretty crazy to me.
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>ST
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>On Thu, Mar 17, 2016 at 3:05 AM, 'Brad' unclefalter@... [mailto:unclefalter@...] [Homebrew_PCBs] <Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]> wrote:
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>Hey guys,
>Some of you might remember my queries about trying to get \ufffdcorrect\ufffd looking single side copper clad PCBs for my vintage TV Typewriter project. I think I may have found a source, and I wanted your opinions to make sure I\ufffdm getting the right thing and can do what I want to do.
>The company I found is American Micro: http://www.americanmicroinc.com/g10-fr4/ [http://www.americanmicroinc.com/g10-fr4/]
>According to Don Lancaster, he used \ufffdG10 Green\ufffd boards. The above appears to be more or less that. Then what AM will do is add the copper cladding. It will cost me $400.00USD to yield the following:
>2 pcs \ufffd 9\ufffdx7\ufffd
>6 pcs \ufffd 5\ufffdx7\ufffd
>Plus remainder from sheet after cutting.
>Now, they are specifying .010\ufffd .. I\ufffdve no idea what thickness the original TVT boards were, but I\ufffdm guessing they were probably thicker (.06ish?). Thoughts?
>I think the price is higher than what those pieces would cost via suppliers on ebay, etc. However I\ufffdm not bothered by that \ufffd the important thing for this project is that the boards look correct and have the correct grain and colour. In searching various single side PCB suppliers, the colours are too fancy or modern and the grain doesn\ufffdt look right.
>For a refresher, here\ufffds a shot of one of the original boards: http://i1381.photobucket.com/albums/ah216/unclefalter/tvtboards2_zpssy81hx8b.jpg~original [http://i1381.photobucket.com/albums/ah216/unclefalter/tvtboards2_zpssy81hx8b.jpg~original]
>What do you guys think? Also, is there anything I need to be wary of in the process that they use to affix the copper cladding to the boards? I\ufffdm hoping to use the toner method of etching to get these done.
>Thanks again!
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>Brad
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