On 2018-10-12 7:10 PM, MrToby wrote:
You dont have to lower them but you need to short them to ground to
make them electrically invisible
No, with 1/4 wave elements you must *open* the feed point - disconnect
any feedlines and remove any components across the feedpoint - to make
them invisible.
73,
... Joe, W4TV
On 2018-10-12 7:10 PM, MrToby wrote:
You dont have to lower them but you need to short them to ground to make
them electrically invisible
On Fri, Oct 12, 2018, 6:07 PM Dick Green WC1M <wc1m73@gmail.com> wrote:
Interesting. This is not how I tuned my 40m 4-square, albeit with tubular
elements not slopers.
Anyway, my understanding is that you disconnect all four elements from the
control box and measure at the feedpoint, not through the phasing lines. I
did it that way and had no trouble tuning the elements. I did, however,
tune them to a frequency that was something like 5% below the target
resonant frequency. I can't remember the exact frequencies now, but I think
I wanted the array resonant at 7.025 MHz, so I tuned them to about 6.700
MHz. Might have been a little higher than that.
I've not heard that you must lower the other elements to do the tuning.
Certainly a pain with nesting tubular elements.
73, Dick WC1M
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