Subject:
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Re: EE RF question
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 4 Aug 1999 02:48:10 GMT
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Original-From:
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Jose-Afredo D. Esguerra <trek@wwnet.com+antispam+>
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Viewed:
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999 times
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Pherd,
It sounds as though he is planning on patching the output of a RF
transmitter to the input of a RF receiver.
73's,
Jose
-----Original Message-----
From: FThompson9@aol.com <FThompson9@aol.com>
To: handyboard@media.mit.edu <handyboard@media.mit.edu>
Date: Tuesday, August 03, 1999 7:41 PM
Subject: Re: EE RF question
> In a message dated 8/2/99 7:38:41 PM Central Daylight Time, mar@cooper.edu
> writes:
>
> >
> > If you have an RF Transmitter and Receiver with Antennas, can you detach
> > the antennas and just connect a co-ax cable between them? I'm guessing
> > this would reduce the noise and interferance to a minumum. Is this • right?
> >
> >
>
> I'm not to clear on what you are describing here. Generally speaking I • would
> say yes, you can slap a piece of coax in without too much loss of function.
> But you really need to know what type of antenna your feeding, the radio's
> frequency, the impedance expected at the terminal by the
> transmitter/receiver. If you wish to read up on it, I suggest going to • your
> local library and finding a book call "The 19xx ARRL Handbook for radio
> amateurs" (where xx is the year of your choice). This book gives you • enough
> information to design your own radios and antennas.
> If the antennas in questions are just "rubber ducks" (short whip
> antennas), I wouldn't worry too much about the feeding system. Just about
> any antenna system is better than a rubber duck. The ones that I have seen
> are just resistors with slightly longer than normal feed lines. Yet these
> tiny devices can be found on a large number of radios communicating over • long
> distances.
>
> Hope this helps,
> Pherd
>
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Message has 1 Reply:
 | | Re: EE RF question
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| Yes, that is what I'm trying to do. I think that this would eliminate interferance. Though the price is tethered operation. I guess it doesn't really have to be a coax. It can just be an RCA A/V cable right? Or how about a single wire! ---...--- (...) (25 years ago, 4-Aug-99, to lugnet.robotics.handyboard)
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