Dear Friends;

First I wish to thank to those people who implemented this forum.

Question PART 1:

I wish to learn how to design an UHF bandpass filter to select ( to allow to pass) some channels from the modulator output.

For example; the 28th channel on UHF spectrum is between 554 and 560 MHz ( 555.25 Visual carrier, 559.75 Aural carrier ). And I want to pass that channel only. Other channels will be unavailible.


Question PART 2:

I want to eliminate some group of channels ( Channels will be adjacent to each other ). For example; I will erase the channels between 20 and 30 ( frequencies between 506MHz and 572MHz ). This case passband will be large.
The filter will erase all channels in that range.

Can you help me to design these filters?

Very Best Regards.

[sbowler]

Welcome to the forums . I feel however that the knowledge you seek may be available here http://www.rsgb.org.uk/ those guys know more about filters and building them than most on here. Not wanting to put anyone down but they build there own equipment and us here mostly purchase ready made kit. Good luck.