Band filters are used to effectively reduce strong signals outside the operating band. This reduces noise and in-band noise, in a receiver there is a much lower risk of producing unwanted signals in the mixer. This gives better overall reception.
On the transmit side, spurious emission signals are suppressed as well, reducing interference with the neighboring stations. The 160m high-pass filter reduces all signals below 1700 kHz (medium and long wave band) which in turn reduces the load of strong broadcast stations on the receiver input and leads to better reception.
Band filters are often used at contest stations, for example in Multi/Multi or Multi/2 setups. Built also smaller stations with one operator and two stations (SO2R) can benefit from good filters by reducing the interference between the two radios. Hunt for contest multipliers on one band while transmitting on another band!
Our field day series have a more rugged waterproof housing what gives a better protection for use in the "field".
The band-filters are constructed with high quality ceramic ATC capacitors, to reduce insertion loss. Also these capacitors allow a higher power handling of 1000 W PEP SSB. The filters have standard PL sockets (SO-239) or optional N connectors and are inserted by using a short coaxial cable right behind the amplifier and before the antenna.
Impedance 50 Ω, size incl. SO239 sockets 138 x 58 x 64 mm.
