|Subject:||Re: LF: Dummy-Load on LW|
|Date:||Tue, 11 Nov 2003 17:07:21 EST|
Hello Walter and group,|
> DK8ND's email raises an interesting point. Can any of our German friends tell me why an impedance of 60 ohms was popular in Germany for some time but not anywhere else?
I think 60 Ohms was once popular because it was one quarter of the once widely used symmectric 240 Ohm systems. Easy to build baluns from 240 to 60 Ohms. I remember our old tube-equipped TV had such a balun.
Next question.. why 240 Ohms for symmetric lines ? .. possibly because of the folded dipole.
This may be only one -probably the wrong- explanation. Another may be the loss on a 60 Ohm cable at higher frequencies is a bit lower than in a 50 Ohm cable.
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