The dummy pipe would be fine.
In theory ABS makes a good radome, but in practice whatever you get at
the hardware store effects antennas significantly. [ABS and PVC is the
first thing that comes to mind when weather proofing home made
antennas.] The AWACS uses S-2 glass for it's radome. The dielectric
constant is worse than ABS, but perhaps when the dust settles, the S-2
glass can be thinner that ABS for the same strength. So perhaps in
practice it is a better radome.
S-2 glass is off the shelf if you have a Tap Plastics handy. S-2 tube
forms are easy to make with a cardboard tube and some mylar. The result
is a beige tube that is somewhat translucent.
I haven't shot mine to test out the ballistic properties.
On 4/15/2012 5:41 AM, Chuck Harris wrote:
Yes, but you GPS antenna surely would notice the infusion
with various fumes and chemicals that come from the vent
pipe. Remember, the vent is open to the sewer, its purpose
is to prevent pressure build up in the sewer from blowing
(or sucking) the water out of the various traps and letting
sewer gas into the house.
However, one could add a dummy plumbing vent to the roof
without anyone noticing.
-Chuck Harris
Chris Albertson wrote:
On Sat, Apr 14, 2012 at 11:01 PM, Perry Sandeen<[email protected]>
wrote:
Esteemed Time-nutters
The religious answer.
1. Install antenna in as inconspicuous location as possible.
A GPS timing antenna should fit INSIDE a 4" plumbing vent. The ABS
plastic
pipe will not effect the GPS signals. Some houses will have a 4" vent
pipe, most will be smaller but it is easy to slip a larger diameter pipe
over a small one. Buy a 30 inch length of 4" black ABS drain pipe and
simply drop it on to of any smaller vent pipe. No one would ever notice
and your plumbing system will not notice either.
Chris Albertson
Redondo Beach, California
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
