[time-nuts] GPS Antennas

[Bob kb8tq]

Hi

The standard process after printing ABS is to vapor the part. That
forms a solid surface.

Bob

> On Oct 15, 2019, at 12:16 PM, Attila Kinali <attila at kinali.ch> wrote:
> 
> On Tue, 15 Oct 2019 11:29:08 -0500
> Bob kb8tq <kb8tq at n1k.org> 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
> 
> -- 
> It is upon moral qualities that a society is ultimately founded. All 
> the prosperity and technological sophistication in the world is of no 
> use without that foundation.
>                 -- Miss Matheson, The Diamond Age, Neal Stephenson
> 
> _______________________________________________
> time-nuts mailing list -- time-nuts at lists.febo.com
> To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
> and follow the instructions there.