[BC] Re: FeedHorn Bug Covers

[RichardBJohnson at comcast.net]

That is a very good and practical way to test for RF plastics.
Remember to put in a cup of water (or coffee) as a dummy
load when you test plastics otherwise, the magnetron
might shut down into its protection mode making you
think you have power, but really zilch.

RBJ


 -------------- Original message ----------------------
From: Chuck Leavens <chuck at wduq.org>
> 
> On May 6, 2008, at 7:15 PM, Bill Allen Jr wrote:
> 
> > what is the attenuation of tyvek or the one that
> > bothers me the most - the styrofoam plug!
> > plastic like the ziploc bag and sandwhich wrap seem to
> > be minimal and have no effect.
> > but do the other attenuate the signal any?
> >
> If it does not get hot in a microwave oven then I wouldn't worry about  
> it. There's your test. No heat OK. Heat at all? fuggedaboudit.
>  
> Chuck Leavens
> Dir. of Engineering and I.T.
> WDUQ Duquesne University
> Pittsburgh PA 15219
> 412-396-5508
>