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<font face="Verdana">I have the cap in the midpoint of the 'driven'
wire. My understanding (albeit quite tenuous) is that the cap
across the primary improves the performance on the higher bands.<br>
<br>
Frankly, if the cap doesn't help I may pull this down and opt for
the 40m version as a test.<br>
<br>
73,<br>
<br>
Tim - KC1RET<br>
</font><br>
<div class="moz-cite-prefix">On 9/26/2022 11:10, William Smith
wrote:<br>
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cite="mid:9D853E6B-FE8B-475C-B1F5-5B5DF68A2115@compusmiths.com">
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I’m surprised it works at all without the cap, let us know how it
does with the cap!
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<div>73, Willie N1JBJ</div>
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<div dir="ltr">
<blockquote type="cite">On Sep 26, 2022, at 10:45 AM, Tim
KC1RET <a class="moz-txt-link-rfc2396E" href="mailto:kc1ret.radio@gmail.com"><kc1ret.radio@gmail.com></a> wrote:<br>
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<font face="Verdana">MANY thanks to all who replied
privately to my original plea!<br>
<br>
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.<br>
<br>
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.<br>
<br>
The missing cap is due from Digikey today. Stay tuned...
(pun intended)<br>
<br>
73, Tim - KC1RET<br>
</font><br>
<div class="moz-cite-prefix">On 9/22/2022 23:59, Jim Idelson
wrote:<br>
</div>
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cite="mid:CANvg0V5pWO0D3+wF7-Mz_eO6YPyXCCmTOgws+dYmo4_Xa-R79g@mail.gmail.com">
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<div dir="auto">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.
<div dir="auto"><br>
</div>
<div dir="auto">So, here's the Pro Tip: <b>Always make
the initial cut on the long side - a good foot to
eighteen inches.</b> It's a whole lot easier to trim
bits off than it is to add length of you cut it too
short.<br>
<br>
<div data-smartmail="gmail_signature" dir="auto">73
Jim K1IR</div>
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<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Thu, Sep 22, 2022,
8:59 AM Tim KC1RET <<a
href="mailto:kc1ret.radio@gmail.com"
moz-do-not-send="true" class="moz-txt-link-freetext">kc1ret.radio@gmail.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div> <font face="Verdana">OK, time for newbie
question...<br>
<br>
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?<br>
<br>
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.<br>
<br>
Thanks!<br>
<br>
Tim - KC1RET</font></div>
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