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Re: Myers' BBQ Grill




The dipole I use is similar, and seems to work fine at 2.4 GHz.

I encapsulated the feed in (GE Silicon II-- non acedic acid based)
RTV, so I've dielectrically loaded it a bit!  Guess I should sweep it
someday on the Network Analyzer, too.  :-)

Fred W0FMS

>From: Greg Dolkas <greg@core.rose.hp.com>
>To: amsat-bb@AMSAT.Org
>Subject: Re: [amsat-bb] Myers' BBQ Grill
>Date: Mon, 14 May 2001 8:51:32 PDT
>
> >
> > Further to my query regarding the short circuit at the connector.  I 
>have
> > opened up the housing and discovered the reason for the short.   There 
>is a
> > quarter wave stub at the centre of the dipole.   The centre of the coax 
>is
> > soldered to one side of the dipole and the braid at the shorted end of 
>the
> > stub.  Quite obviously this is a matching technique and the antenna 
>should
> > be fine at RF.
>
>"Fine", of course, is a relative term.  The stub was undoubtedly designed
>for around 2.6 ghz.  Can anybody calculate how much is lost when it is
>run at 2.4 ghz?  I am wondering if this is a factor in why I'm having
>such poor reception with my Lance BBQ grill and feed.  At DC it measures
>about 1 ohm, so the construction might be similar to yours.
>
>My guess is that it probably isn't enough to notice, but I want to look
>at everything.
>
>Thanks,
>
>Greg.
>----
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