twb8899 wrote:
>
>
> Roland,
>
> You're correct about using the methods I mentioned earlier for micro
> wave strip lines. I used to have a commercial shop and used much of
> the same equipment I now have to make strip line and other RF
> circuits. These were for McDonnell F/A-18 parts and equipment. I
> closed that plant several years ago but kept most of the smaller
> equipment for my home based shop.
>
> I built my spray developer and spray etcher from scratch and use them
> all the time. They are a simple design and kind of based on the Kepro
> stuff. When Kepro shut down I bought quite a bit of the manufacturing
> equipment they used to make their products. I'm now thinking about
> making the etchers myself and offering them for sale. Biggest problem
> is getting the cost down. The Kepro units were way too expensive and
> could probably be offered for a more attractive price with some
> engineering changes.
>
> This new spray etcher is in the works but it's still to early to say
> much about it except that the prototype works great. If we can get the
> cost just right it will be available later this summer. If anyone is
> interested in a product like this contact me by email and I'll forward
> photographs and more information when we are ready to go.
>
> Tom
Hi Tom, I'll be curious to know the concept of your new spray etcher. I
too built a machine from scratch for a hobby project. You can see a
short description of it at my home page.
http://members.optusnet.com.au/~eseychell/PCB/SprayEtcher/index.htmlI posted the above link on Homebrew_PCB a couple of times but got zero
response. I would be interested in hearing any comments you may have. My
design is probably too complex to manufacture as a 'very low cost' spray
etcher, as the prices a hobbyist expects to pay isn't much. The
important thing to me is that this machine works very well, though it is
on about the 3rd major revision. You can see performance tests by
looking at etching uniformity shown at the bottom of the web page.
Adam