Mike, The Radio Hotel Nov 2016 and May 2020 are about wire for antenna use. References are given for more indepth studies, etc.
Go to https://bvarc.org/home/tech-downloads/ GL and 73...Rick W5RH -- The Radio Hotel On Tue, Aug 15, 2023 at 5:42 PM Gus Bernard via BVARC <bvarc@bvarc.org> wrote: > BTW, for antenna wire, see articles by our own Rick Hiller in the > technical section at www.bvarc.org . I think he's addressed this > subject. I like #14 or #12 insulated. Solid or stranded choice depends on > your strength and flexibility requirements. Thicker wire gives a slightly > better bandwidth at the cost of weight. > > Gus > > On Tue, Aug 15, 2023, 5:30 PM Gus Bernard <gneln...@gmail.com> wrote: > >> See product design specs, as well as articles, at Balun Designs.Com. use >> the core mix type for the bands you'll operate on. For high power, >> double-up on size 240 cores. Youtube "TRX Bench" channel has a great >> 4-part video series on building baluns. >> >> My experience tells me that if I want a long lasting, reliable balun >> (good quality components and workmanship that withstand the elements), it's >> more cost effective to buy off the shelf from Balun Designs or equivalent. >> (The amount I saved wasn't worth the trouble.) Of course, making my own is >> fun and educational; but I now buy my baluns from Bob. >> >> Gus K5GMB >> >> On Tue, Aug 15, 2023, 10:39 AM mike.williams shopjubilee.com via BVARC < >> bvarc@bvarc.org> wrote: >> >>> Time to pick your brains… >>> >>> >>> >>> I am interested in EFHW antennas for primary use on 20/40/80m – but want >>> to be able to run my Worthmore 600w amplifier. >>> >>> I found a MFJ model - MFJ-1982HP is rated for 800pep >>> >>> https://mfjenterprises.com/products/mfj-1982hp >>> >>> >>> >>> This antenna is available in three power ratings: >>> >>> MFJ-1982LP – 30w >>> >>> MFJ-1982MP – 300w >>> >>> *MFJ-1982HP – 800w* >>> >>> >>> *Anyone have experience with this antenna?* >>> >>> >>> >>> >>> >>> A couple of questions – >>> >>> 1. If you have experience with high power (>= 600w) transformers for >>> EFHW antennas, what design did you use >>> 1. Core type and number of cores >>> - type 53 has a higher curie temp as opposed to type 43.... >>> 2. Wire AWG? >>> 3. I see a number of YouTube videos recommending 56:1 as 49:1 >>> - Comments? >>> >>> >>> >>> 1. What is your recommended wire for the radiation element? >>> 1. Material – >>> >>> i. Copper over >>> steel? >>> >>> ii. Hard-drawn >>> copper? >>> >>> iii. Other >>> >>> b.AWG? >>> >>> i. Number of >>> Strands & strand count? >>> >>> c. Jacket material >>> >>> d. Other? >>> >>> >>> >>> Your guidance is appreciated! >>> >>> ’73, >>> >>> Mike KK5SC >>> >>> ________________________________________________ >>> 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/ > -- Rick Hiller *e-mail: rickhille...@gmail.com <rickhille...@gmail.com>* *Cell: 832-474-3713* *Physical: 9031 Troulon Drive* * Houston, TX 77036*
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