[time-nuts] GPS Antennas

[jimlux]

On 10/15/19 8:19 PM, ed breya wrote:
> Attila wrote:
> 
> "Bob kb8tq <kb8tq at n1k.org 
> <http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com>> wrote:
> 
>> /There are a lot of 3D printers out there that happily print ABS …. /
> I am not sure that's a good idea.
> The way how filament printers work will lead to lots of
> pores where humidity can accumulate. Not something you want.
> 
> Thermoforming sheets, on the other hand, gives a smooth, closed
> surface. Additionaly, the tensile strength of the sheet after
> thermoforming is higher than that of filament printed structures.
> This means a radome can be thiner, which leads to less lensing,
> which is the major source of phase center shift.
> 
>              Attila Kinali"
> 
> Also, how would 3D printing plastics hold up to UV from sunlight? I 
> don't know much about the materials used, but this is mostly an outdoor 
> application, so it has to endure the elements too.
> 


As a middle school shop teacher commented: "Paint covers a multitude of 
sins"