- Sun Jul 23, 2017 5:25 pm
#195632
My first negative ion generator has been in operation for two years and has been a success. I'm now putting together a second using physically smaller capacitors and have decided to paint the cap-diode ladder with a conformal coating:
http://www.vitency.com/electronics/naig.html
After checking the stores, I'd guess that most of the spray cans contain a common thinned-out polyurethane with a fancy label and a top-dollar price.
It's quite likely that a good-quality hardware-store can of polyurethane would serve just as well, perhaps better. I'd prefer to brush on a thick coat rather than go through the mess of spraying. I also note the availability of acrylic coatings, some or all of which I know are water-based.
Checking the volume resistivity and dielectric strength of poly supports my views - not sure about acrylics. Does anyone have practical experience or specialized knowledge of these things? With thanks for any replies.
http://www.vitency.com/electronics/naig.html
After checking the stores, I'd guess that most of the spray cans contain a common thinned-out polyurethane with a fancy label and a top-dollar price.
It's quite likely that a good-quality hardware-store can of polyurethane would serve just as well, perhaps better. I'd prefer to brush on a thick coat rather than go through the mess of spraying. I also note the availability of acrylic coatings, some or all of which I know are water-based.
Checking the volume resistivity and dielectric strength of poly supports my views - not sure about acrylics. Does anyone have practical experience or specialized knowledge of these things? With thanks for any replies.