Usually in conditions of large megacities and even in rural territories if there are near established base station of land mobile radio noises level are very high. At communications with reflection from the Moon, when power of a signal are very weak a important aspect is a signal to noise ratio. This we can achieve only then if use high selective filters. These filters made by coaxial cavities. We bring to your attention filters, assembled from 5,8 and 10 inches cavities.
Typical selectivity characteristics PF10-2HAM-100
|Span 1 MHz||Span 20 MHz|