[Ronja] Input impedance

Jakub Ladman ladmanj at volny.cz
Fri Aug 3 21:33:31 BST 2007


Dne pátek 03 srpen 2007 21:16 Pramod yaduvanshi napsal(a):
> I want to change the cable from Twsiter2 to Tx and Rx from 75 ohms to 50
> ohms. what are the changes required in Tx and Rx circuits? Has any one
> tried out exisiting system with 50 ohm cables how much is the degradation?
> Will i have to modify the twsiter circuit as well in case of 50 Ohms ?
> Is it advised to use matching baloons?

Oh, its silly idea to use a Balloons, a play-ground is a better place to use 
it, i think :-)

But nor balun is not necesary, it is proven that ronja works with 50Ohm cable 
well.

You may recompute the resistors at both ends of coaxes to match 50Ohms 
exactly, but in case of not very long coaxes it is really not necesary.

Jakub Ladman 



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