1090MHz filter Bert Modderman PE1RKI

	Bert Modderman Engineer
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I can make filters for 1090mhz with different specifications.

a 40mhz wide 4 pole filter is 50db down on 1230 mhz and 950mhz.
± 0.6db loss on 1090mhz.
price 110 euro,the case is 138mm long.

a 20mhz wide 4 pole filter is 80db down on 1230 mhz and 950mhz.
± 0.7db loss on 1090mhz.
price 130 euro,the case is 155mm long.

a 40mhz wide 5 pole filter is more then 70db down on 950 and 1230.
loss is ± 0.6db on 1090mhz.
price 150 euro, the case is 175mm long.

a 20mhz wide 5 pole filter is more then 100db down on 950 and 1230.
loss is ± 1.3db on 1090mhz.
price 170 euro, the case is 195mm long.

a 20mhz wide 4 pole filter:

size comparison of a a 20mhz wide 4 pole filter to the 23cm filter.