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Impedance matching?

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=71185
Printed Date: April 25, 2024 at 12:16 PM


Topic: Impedance matching?

Posted By: ripley01
Subject: Impedance matching?
Date Posted: January 20, 2006 at 4:29 PM

I got a radio with a 50 ohms antenna input and a car with a 150 ohms antenna and cable.

While it works okay with a universal adapter cable, which is simply a straight through connection, I wonder whether any benefits would be gained by using a device to match the impedances?




Replies:

Posted By: geepherder
Date Posted: January 23, 2006 at 4:59 PM
Yes.

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My ex once told me I have a perfect face for radio.



Posted By: ripley01
Date Posted: January 29, 2006 at 7:28 AM

Bit late to respiond, as I missed the notification of your reply.

Obsious follow-on question: how can you achieve this?




Posted By: geepherder
Date Posted: January 29, 2006 at 1:50 PM

I thought you already had one.  I've never built one- I've used them before when installing antennas in houses with the old ribbon style cable as opposed to coax cable.  You get more channels when you use a proper adapter.

Search the net for one that's available, otherwise you'd be hunting for a diagram and piecing it together.



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My ex once told me I have a perfect face for radio.



Posted By: ripley01
Date Posted: January 29, 2006 at 2:47 PM
Well, I have been looking for impedance matchers, but haven't found readily suitable for this application. Most are for transmitters, not for receivers, and are therefore way too bulky and expensive. I think it should be possible with just a couple of resistors, at the expensive of some loss of energy, or a transformer, but no idea where to get a suitable one.


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