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Impedance matching?


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ripley01 
Member - Posts: 33
Member spacespace
Joined: November 27, 2005
Location: Netherlands
Posted: January 20, 2006 at 4:29 PM / IP Logged  

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?

geepherder 
Platinum - Posts: 3,617
Platinum spaceThis member consistently provides reliable informationspace
Joined: October 27, 2003
Posted: January 23, 2006 at 4:59 PM / IP Logged  
Yes.
My ex once told me I have a perfect face for radio.
ripley01 
Member - Posts: 33
Member spacespace
Joined: November 27, 2005
Location: Netherlands
Posted: January 29, 2006 at 7:28 AM / IP Logged  

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

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

geepherder 
Platinum - Posts: 3,617
Platinum spaceThis member consistently provides reliable informationspace
Joined: October 27, 2003
Posted: January 29, 2006 at 1:50 PM / IP Logged  

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.

My ex once told me I have a perfect face for radio.
ripley01 
Member - Posts: 33
Member spacespace
Joined: November 27, 2005
Location: Netherlands
Posted: January 29, 2006 at 2:47 PM / IP Logged  
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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