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| To: | [email protected] |
|---|---|
| Subject: | Re: LF: Dummy-Load on LW |
| From: | [email protected] |
| Date: | Tue, 11 Nov 2003 17:07:21 EST |
| Reply-to: | [email protected] |
| Sender: | <[email protected]> |
|
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. Regards, Wolf DL4YHF. |
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