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  am/fm tuner,gps lcd screen         


Author: Jane Cheung
Date: Mar 2, 2008 22:37

Hi everybody,

We are a agent of MITSUMI (Japan brand) in Shenzhen,China.We supply
am/fm tuner,gps lcd screen from 1.8'' to 8''.
Website:www.mitsumi.co.jp/english.

Welcome to contact me by email:amanda@goldfullsemi.com for more
information about our products.I will give you my best service and
competitive price,good quality etc.Thank you.

My contact : msn:jane0891@hotmail.com
email:amanda@goldfullsemi.com

--
Jane Cheung
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  Matching Coax Impedance: To Receiver or To Antenna ?         


Author: Robert11
Date: Mar 2, 2008 11:36

Hello,

Have a Scantenna antenna (receive only) in attic.
It came with 75 ohm RG 6 coax, so presumably the output has a 75 ohm
impedance.
How this varies with freq. I have no idea.

Have a new scanner that says to use 50 ohm coax.

From old posts, the consensus seems to be that it doesn't matter if you use
50 or 75 ohm coax for
a run that I have of about 50 feet.

Do you folks agree with this ?

From a somewhat more rigorous and theoretical view, should the coax, even it
hardly matters, be matched to the antenna output impedance, or the input
impedance of the scanner ? Why ? (again, receive only)

Any thoughts on this would be most appreciated.

Thanks,
Bob
6 Comments