Filter Design Software

Pull down Zverev. ;)

Cheers

Phil Hobbs

...Jim Thompson

My copy is still in a moving box somewhere :-( ...Jim Thompson

Pan (or Giganews) keeps not posting my replies -- here it is again with the "reply-to" list trimmed:

That's asking for some awfully high Q resonators (certainly Q > 100). I think you're outside of what you can do with coils, and into crystal filter territory.

A custom crystal filter is going to be big, heavy, and expensive in engineering time, parts, and alignment time. That's assuming you can find someone who'll make it for you, because these days if you have a task like that it's done with DSP.

You may be able to find an off-the-shelf filter that has the bandwidth and shape factor you need but not at 2MHz carrier frequency, in which case you can build a superheterodyne radio and either take your output at the radio's IF, or have the thing regenerate signal back at 2MHz.

DSP, using today's components, will be smaller, lighter, quicker and cheaper -- the only thing it won't be is less power hungry, and depending on what you need around your filter, the cost of using DSP may not be all that great.

I find,

Tim

Jim, you still need this filter? Tonne Software's Elsie will give you 5 or 6 orders for the freebie version. Julian