The entire antenna system can be purchased in DIY or electronics stores for less than €50:
Than have a look at the measures here (uhf-satcom.com) or
here (satellitenwelt.de) and resize the TV yagi accordingly.
This normally means shortening the elements by a few centimeters using a light metal hacksaw and reducing the spacing between elements by drilling new holes for them. On some models I found this wasn't even necessary as measures were already right.
Driven element may require more care, as it's often built as a folded dipole. Needs than to be unfolded but, given
the thin walls of the piping, there's a risk to break it. Flattening the tube into a strip with a pair of pliers seems to
|The broadband amplifier will definitely pull some junk into your receiver. As normally TV transmissions are horizontally
polarized, setting your newly built antenna in vertical will help reducing interferences, while the circularly polarized
satellite signals won't be affected.
Retuning the amplifier will help, but that requires instruments not readily available to the majority of scanner enthusiasts.
This solutions is much easier than stacking several antennas, as matching and spacing can be quite
I'm sure helical antennas are a superior choice, but will hardly go unnoticed, while only somebody with a clue will be able to tell the difference between your aerial and a standard television one.