Homebrew_PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Dean Thompson"

> for quite some time, and just yesterday made my first PCB using the

TT

> method. It worked out really well! I used an ordinary clothes iron

to

> transfer the image to the PCB. I tried to use a laminator but it

wouldn't

> work, the toner wouldn't stick at all. My laminator has an

adjustable

> thermostat (max 140 deg C), is this hot enough? Anyway, the iron

worked

> great, very consistent. I was surprised because the board was

fairly large

> (270mm x 150mm).

I believe that should have been plenty hot enough. You should see
the toner begin to "tack" by the 4-5 pass on a board that size. Was
it 2oz clad? I remember that I did have to run them through the
laminator a few more times than normal when I ran a boards that
size. I had 1oz 6"x9" dual sided approx 18 times --lost count. When
I have a lot of copper or running 2oz I preheat the board with a
paint stripper heat gun to "get the ball rolling"(it also helps dry
out the board from my when I wash off the copper oxide/protective
coating just prior). I don't know if that really helps, but thats
the way I've been doing it and it seems to work. Anyway, your
results did turn out to be pretty darn good with the iron. I wished
my firsts were that nice!

> Also, thanks to Dal Wheeler for the great guide he has on his web

page! It

> helped me out.

I'm glad it helped! I'll have to mention puting on a silk layer in
the write up. I'm impatient so I don't normally do it, but looking
at your pictures makes me think that I should be.

BTW, what are you doing with that many relays?