[time-nuts] Antenna restrictions [was Lucent 40 dB Antenna]

[gary]

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<sandeenpa at yahoo.com>
>> 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 -- time-nuts at febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>