If you are trying to build an end feed half wave (EFHW) antenna, the length is in the name. A half wave at 40m is ~66 feet. Start with 67 feet and fold back the end until you get a good SWR. You need a 49:1 transformer on one end to get the impedance down to 50 ohm and to connect your coax. Mine is resonant at 10 through 40m.
David WJ9O > On Aug 20, 2024, at 11:54 PM, Suggs, Marvin (KTRK-TV) via BVARC > <bvarc@bvarc.org> wrote: > > Hey everybody > I’m looking for a diagram and dimensions for a 40 meter end fed sloper > antenna. Not having much luck on YouTube. > Thanks > Marvin > N5RKW > Sent from my iPhone > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > BVARC@bvarc.org > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Publicly available archives are available here: > https://www.mail-archive.com/bvarc@bvarc.org/ ________________________________________________ Brazos Valley Amateur Radio Club BVARC mailing list BVARC@bvarc.org http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org Publicly available archives are available here: https://www.mail-archive.com/bvarc@bvarc.org/
