Topband: Length of phasing line in triangular Hi-Z array

[Ignacy Misztal]

I have received a used 3-el HI-Z but without the phasing line. What is its
electrical length?
I saw some notes that it should be 27 degrees long. But this is frequency
dependent.
Urgent question as it should be ready for this evening.
Ignacy, NO9E
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UR RST IS ... ... ..9 QSB QSB - hw? BK