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circuit board out of lexan ?

Discussion in 'Shock Brother's DIY Amps' started by Fontane57, Jul 26, 2009.

  1. Fontane57

    Fontane57 Tele-Meister

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    has anyone ever used lexan to make circuit boards . i made a 5e3 board with it but before i put it together i would like to to know if it will work. being broke it would surely help out if i can use it . thanks johnny
     
  2. mojo2001

    mojo2001 Tele-Holic

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    Lexan melts at ~300F, so you cant solder right up against it.

    What you could do is run the wires through the holes, clamp a hemostat on as a heat sink to protect the lexan (or needle nose pliers with a rubber band on the handle), and solder the wires 1/8-1/4 out from the board.

    In other words, just use the board to hold the parts in place.

    Another el cheapo approach is to use 1/8-1/4" wood and do as above or use small nails as solder terminals.
     
  3. Fontane57

    Fontane57 Tele-Meister

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    thanks bud, the melting point was what i was worried about. that and how conductive it might be . looks like i better try for something else .
     
  4. mojo2001

    mojo2001 Tele-Holic

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    You can use it. Just keep the heat off the board while soldering.

    Should be quite a good insulator (and look cool).

    Otherwise, I'd say the ghetto wood and nails approach is a classic--or just wood. So what if it gets slightly burned?
     
  5. Nash

    Nash Tele-Holic

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    I'd give it a shot and if it starts to melt you can stop using it and move to a silicon based board or wood like others suggested. I think that as long as you're careful there wont be any melting and you'll have a cool looking board holding your components.
     
  6. Ben Harmless

    Ben Harmless Friend of Leo's

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    Drill for turrets or eyelets and you'll be golden. You'd still want to solder quickly, but it's totally doable.
     
  7. vinman

    vinman Tele-Meister

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    I know times are hard and believe me, I've been there more than once with a family. If your lexan is free, well then you can't beat that. Otherwise the cheapest price I have found on G-10 board material is Tube Depot. They have been running a sale for a while now at .45 an inch as opposed to .60. And their shipping is only 3.95 no matter how much you order with a small limitation. So, say a 12 inch board would cost 5.40 plus the 3.95 shipping. Order other parts, it's still 3.95 shipping.
    But like I said, I've been there and remember turning down things because I didn't have $5 I could spare and lunch would be a buttered roll and coffee.
     
  8. Fontane57

    Fontane57 Tele-Meister

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    thanks everyone. yea the lexan is free and i,ve got a couple differant thickness"s to chose from.

    i drilled the first and installed eyelets cause thats what i had. shoot i"m gonna give it a try . i,ll let ya,ll know how it comes out . thanks again johnny p.s. first one is .093 thick but i have enough 1\4 inch for several .
     
  9. AumAmps

    AumAmps TDPRI Member

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    Ive used it in my tweed Princeton clone with a copper chassis and originally 400+ volts on the plate. I had a picture around here somewhere. Its a very very quiet amp. I wish I could build larger amps out of copper. The Lexan holds up fine but when I went in there to change the power transformer out I did mark up the board a little bit from the gun and had to epoxy one of the turrets back in. Its a studio-only amp so I dont have to worry about road reliability and everyone loves the thing to death. I am working on another amp right now and im going to use the Lexan again since I have it laying around.
    I was originally worried about static and random oscillations across the surface at first but that problem never arose. Just make sure those turrets are tight. Heatsinks are a good idea. I use silver solder and turrets so I can get in and out pretty fast.
     
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