[bars] Measuring wire antennas

[Tim KC1RET]

MANY thanks to all who replied privately to my original plea!

I go the thing (80m EFHW) up this weekend following the design on the 
OCFMasters website.  Well...  partial success.  Granted, I'm still 
waiting for the cap that goes across the primary at the 39:1 matching 
xformer/balun and that it is still very low, only about 8ft above the 
ground at the lowest point.

The SWR at a useful point in the band (measured at the choke) is OK on 
80, 40 and 10, but really quite bad everywhere else.

The missing cap is due from Digikey today.  Stay tuned...  (pun intended)

73,  Tim - KC1RET

On 9/22/2022 23:59, Jim Idelson wrote:
> The 'effective electrical length' of the wire is influenced by several 
> parameters. One of them is the physical length. Others include the 
> type of wire, the insulation and the height above ground. Hard to know 
> what that little loop from the main wire to the balun will do. You 
> don't actually know that electrical length for sure until you measure 
> it with a signal applied from your antenna analyzer or transmitter.
>
> So, here's the Pro Tip: *Always make the initial cut on the long side 
> - a good foot to eighteen inches.* It's a whole lot easier to trim 
> bits off than it is to add length of you cut it too short.
>
> 73 Jim K1IR
>
> On Thu, Sep 22, 2022, 8:59 AM Tim KC1RET <kc1ret.radio at gmail.com> wrote:
>
>     OK, time for newbie question...
>
>     When measuring the length of a wire antenna element, such as an
>     EFHW, do you include or ignore the bit from the end insulator to
>     the terminal of the balun?
>
>     Yes, I know, it will only amount to 4-6 inches but I'd rather get
>     it right from the start than have to add/trim later.
>
>     Thanks!
>
>     Tim - KC1RET
>     -- 
>
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>
>           Tim Carter - KC1RET
>
>     			
>
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-- 

Courageously sent from a non-Apple device that /includes/ a headphone jack.

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<https://kc1ret.com/img/kc1ret-qsl-card-front-v3.png> 	


      Tim Carter - KC1RET

			

	+1.978.710.0133 <tel:1.978.710.0133>

	kc1ret.radio at gmail.com

	https://kc1ret.com

"Computers are incredibly fast, accurate and stupid; humans are 
incredibly slow, inaccurate and brilliant; together they are powerful 
beyond imagination." -- /Albert Einstein/

Warning: Spelling errors in this message are the product of a poor 
school system. Pay teachures more than athletes.
IMPORTANT: This email is intended for the use of the individual 
addressee(s) named above and may contain information that is 
confidential privileged or unsuitable for overly sensitive persons with 
low self-esteem, no sense of humor or irrational religious beliefs. If 
you are not the intended recipient, any dissemination, distribution or 
copying of this email is not authorized (either explicitly or 
implicitly) and constitutes an irritating social fauxpas. No animals 
were harmed in the transmission of this email, although the mutt next 
door is living on borrowed time, let me tell you.
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