40 dB's lowpass - 50 ohms HF - filtre.
filter

TVI is highly undesireable, if nowhere else, then amongst your neighbors. With this filtre I've accomplished to have both TV anf HF anteannas in the same mast, with no drawbacks. This is clearly one of these project you owe to yourself, and your neighbors.
Check data at the bottom of the page.
diagram
L1 og L5 = 7 turns 1.2 mm cul around a 10 mm plug.
L2 og L4 = 9.5 turns 1.2 mm cul around a 10 mm plug.
L3 = 13.5 turns 1.2 mm cul around a 10 mm plug. 		Output above 36 MHz is with this filtre decreased by 40 dB. The coils sinks into resonans at the following frequencies:
L1 & L5 = 44.4 MHz.
L2 & L4 = 32.5 MHz.
L3 = 25.5 MHz.
Insertion-loss less than 0.1 dB
----------------------------------------- In case you've got questions, feel free to contact me----
e-mail oz6bu@qsl.net omputer