Ive read about the 64:1 being used on end fed half waves. I personally use a 49:1. I think its really going to depend on the impedance. If 3200 ohm, use 64:1. If its 2450 ohm go with the 49:1.
Chris/AC5CM Typos brought to you by iPhone On May 8, 2024, at 00:12, Gary Sitton via BVARC <bvarc@bvarc.org> wrote: I agree on a 49:! Unun for HWEF use. For 1.8 mhz special care should be taken in the design. G. On May 7, 2024 8:48:02 PM Michael Shanks via BVARC <bvarc@bvarc.org> wrote: I do believe it would be best to go to a 64 to 1 ballon I believe it’s 64 to one I could be wrong rather than the 49 to one for that wire if you got the space try it I have Sent from my iPhone On May 7, 2024, at 8:24 PM, Michael Shanks <m733sha...@gmail.com> wrote: If I remember correctly, my NF half wave for 180 was 262 with a 49 one ballon about 20 foot to 37 foot up in the air worked well with that much wire in the air. You’d be surprised what you can hear. Sent from my iPhone On May 6, 2024, at 7:08 PM, Gary Sitton via BVARC <bvarc@bvarc.org> wrote: Also, if the main portion isn't well above ground, you'll need to make the length greater to account for the capacitive effect of the ground itself. L configurations are very effective but avoid the inverted V scheme. G. On May 6, 2024 12:58:52 PM Gary Sitton via BVARC <bvarc@bvarc.org> wrote: Clue: HWEF (half wave end fed) so half of160 meters is 80 meters or about 250 feet! Gary K5AMH ________________________________________________ Brazos Valley Amateur Radio Club BVARC mailing list BVARC@bvarc.org<mailto:BVARC%40bvarc.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/ ________________________________________________ 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/
