What is the difference in cost? I assume the larger the diameter of the wire the safer. 450watts is quite a lot of power. I wouldn’t cheap out on the coil.
On Sun, Jul 3, 2022 at 1:48 PM JP Pritchard via BVARC <[email protected]> wrote: > Sounds like an ideal inverted V. Thanks for the formula. > > On 07/03/2022 12:44 PM Mark via BVARC <[email protected]> wrote: > > > JP, > > As you increase the diameter of the wire, so goes the Q; larger wire will > have a higher Q. Q=XL/R > > > I am lucky and have a pine tree to connect the apex of an inverted V for > 40M . The two ends go to the sides of the fence. > > > Mark > > K5GQ > > > > > Greetings, > I am building a 40/80 EFHW antenna that uses a loading/choke coil at the > end of the resonant length for 40 meters. Another 25 meters of wire is then > added to the far end of the coil. I will never run more than 450 watts peak > SSB through it. The plan I'm using as a guide calls for 19AWG magnet wire > for a coil built on a 1.5 inch form and measuring 110 uH. 76 turns of wire > to get there. > > Now to antenna physics. Does the coil wire at the end of prox.65 feet of > antenna really have to be that fat (19AWG). It seems like the current and > the voltage would both be pretty low there and a much finer gauge (read > less expensive) of wire would probably be okay, but I'm certainly not sure > of that. Any thoughts? > > 73, JP, K5JPP > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > [email protected] > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Publicly available archives are available here: > https://www.mail-archive.com/[email protected]/ > > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > [email protected] > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Publicly available archives are available here: > https://www.mail-archive.com/[email protected]/ > -- Brian Shircliffe M.M. www.brianshircliffe.com 832-452-9868
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