RoomCap Antenna
Felix,
I'm surprised over this test...
What you are implying but not writing is that your RoomCap doesn't work as
well as an EH on 160m... I don't think that was what you intended... Hehe
Go home and do some basic math will you... The 160m EH need to be mounted
1/4 of a wavelength up while your RoomCap seems to be a vertical, able or
even meant to be used from groundlevel...
If, as you claim, the EH is only 2 S units down? Wow! That's good - even
absolutely bloody excellent! Well done EH! Unless the compared antenna is
crap of course! And as I have not seen any building description on the
RoomCap yet, who can tell...
If that EH where to be mounted at it's design height, you would have won at
least 3 to 6dB signal strength, equal to 1 to 2 S units.
Also, the bandwidth of the EH suffers when mounted wrong ( to low ).
Why can't these testers RTFM before setting out to prove function or
no-function of whatever gadgets they want to test?!
It's clearly stated about the mounting height!
However!!!!!
I'm very concerned over your statement about only one (1) S unit down if you
rx/tx outside the EH design frequency ( bandwidth ).
My EH's ( proper STAR's ) are shortcircuits when outside the bandwidth! This
is why they suppress TVI/RFI and harmonics in general as well as preventing
the coax to radiate ( one of the reasons anyway ). If described in S units,
the STAR is down 7 to 9 S units ( well outside the 3dB bandwidth )if
operated outside the bandwidth. It just goes quiet and the bandnoise just
vanishes - exactly like the shorted coax it just became...
You just told me the 160m EH you tested radiates from the coax?! As you only
had 1 S unit down outside the bandwidth. Bad bad bad! Was that an EH at
all?! Or just a short fat dipole?
And guess what... All the EH documentation are available on the net for hams
to try... without charges and fees...
//Dan, M0DFI
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