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Using an HF balun on 6 meters?

Nov 2nd 2017, 13:16

K6DDJ

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
Hi All,
I have a dipole antenna cut for 3.9 Mhz with a balun at the antenna. The balun is a standard type that goes to 30 Mhz at several KW rating. Not surprising, the antenna shows an excellent match on the bottom end of the 6 meter band. The question I have is are there any consequences of using that antenna with that balun being used on 6 meters? I am hoping that the only issue would be loss of the balun's ability to act as a balun should, by running at that frequency, and the coax itself may then be a part of the radiation profile. I can live with that as long as there are no serious losses or heating issues. Any advise or wisdom?

Dean K6DDJ
Nov 2nd 2017, 14:00

W1VT

Super Moderator

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
A heating issue will generally show itself as SWR drift as you transmit. It doesn't take that much power to show itself as SWR drift, as a large 2.4" toroid will only handle about 10 watts. Ferrite is a poor conductor of heat, so it can't handle a lot of power.

Zack Lau W1VT
ARRL Senior Lab Engineer

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