RE: [amsat-bb] Arrow 14 el. 440 crossed yagi - feeding?

["Howard Long" <howard@xxxxxxxxxxxxxx>]

Hi Mal

Sorry, I just noticed an error.

> 1.  If I divide the coax and feed one antenna with a 1/4 wave stub and the
> other with a 3/4 wave stub it appears I'd get a 180 degree phase shift.

You need to have a 1/4 wavelength difference between one plane and the
other, not a half wavelength.

You need (a) one 50 ohm feeder 1/4 w/l longer than the other, and (b) a
power splitter made from two 1/4 w/l 75 ohm sections. Remember to include
the coax velocity factor.

Cheers & 73 Howard G6LVB


----
Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org