Radio Road

No they're directional and need to be aimed as my post indicated.

121.45.220.150

This Post Has Been Edited by the Author

In Reply to: RE: not yet posted by user510 on July 11, 2017 at 11:07:53

The axis is at right angles to the two wires in the 300 ohm ribbon.
Their polar diagram is a figure 8. Like a figure-8 mike.
So that, when aligned vertically you can put it on a vertical board and rotate it along that vertical axis it so that it points at the strongest signal in that room, for each station.
Noting that most FM transmitters use mixed polarisation IE 50% vertical and 50% horisontal - a vertical dipole on a board with a rotating base is more practical than trying to orient a horisontal dipole to maximum signal.
I'd recommend that you at least twist the down-lead part of the ribbon to minimise its signal pick-up capacity. OR buy a 300/750hm balun and run coax to the tuner.
You could also add another dipole on the other side and run them in parallel. But you would need to wind a 150:75ohm balun. That kinda stuff _is_ on the web! :-)

Warmest

Tim Bailey

Skeptical Measurer & Audio Scrounger

Edits: 07/11/17

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