31-01-2017, 07:33 PM
I have a VHF satellite antenna that has a PCB mounted below the driven elements containing phasing harness connections. The PCB is shielded from direct rain by the element mounting arrangement, but it's base is visible below. The antenna is designed for short term portable use.
I want to make it more weatherproof for use permanently outdoors, receive only. Element joints I can seal using self-amalgamating tape, but it's the PCB that's the problem. I want to pot the whole base of it to the elements and mounting arrangement so it is completely sealed.
I've thought of non-acidic silicon sealant but I don't know it's affect on RF. I see Jaycar has a polyurethane potting compound, but curiously the manufacturer doesn't list it on their website.
https://www.jaycar.com.au/polyurethane-p...d/p/NM2016
Has anyone used this or can suggest a better compound?
I want to make it more weatherproof for use permanently outdoors, receive only. Element joints I can seal using self-amalgamating tape, but it's the PCB that's the problem. I want to pot the whole base of it to the elements and mounting arrangement so it is completely sealed.
I've thought of non-acidic silicon sealant but I don't know it's affect on RF. I see Jaycar has a polyurethane potting compound, but curiously the manufacturer doesn't list it on their website.
https://www.jaycar.com.au/polyurethane-p...d/p/NM2016
Has anyone used this or can suggest a better compound?
Damien
http://www.vk3rx.com
http://www.vk3rx.com