[Microwave] Re: Microwave digest, Vol 1 #62 - 1 msg

Sun, 23 Feb 2003 06:58:49 EST

In a message dated 2/23/03 9:06:02 AM GMT Standard Time, 
[email protected] writes:

> From: "KD7JYK" <[email protected]>
> To: <[email protected]>
> Date: Sat, 22 Feb 2003 22:27:55 -0800
> Subject: [Microwave] Attenuation???
> 
> Has anyone experimented with Delrin at GPS frequencies?  I would like to
> make a Delrin cover for my antenna and wonder about attenuation at
> thicknesses of 1/4" - 3/8".
> 
> Kurt
> 
> 
Hello Kurt

It's an easy test. If you lready have the Derlin try the GPS and look at the 
received signal strength indicator.
I suspect there is a fair margin in the performance. I just bought an Etrex 
Venture and was surprised that the antenna is located inside the unit and it 
has to look through a plastic case which has 'metalflake chips' mixed in with 
the plastic.

BTW. Do you happen to know if the NEMA output from the Etrex series can be 
used for locking a frequency counter? Apparently it has 1.00000 etc per 
second updates

73

David  G0MRF

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