David,
What do you think the isolation of the 3251 switch is at 455 KHz.
looks like a cool project. frank WA1GFZ
David Brainerd <[EMAIL PROTECTED]> wrote:
Chuck:
The Bandpass Filters are 3 pole Chebychev. They were designed
and simulated using RFSIM99. They are fairly wide since the filters
were designed for a general coverage receiver rather than ham band
only. They are laid out for SMD caps and inductors. The layout is
posted at
<http://users.wildblue.net/wb6dhw>
The layout will be changing slightly because I need to add biasing
on the switches( done on the schematic), I am going to separate the RF
ground from the supply ground, and I am going to include provision for
a 1 to 1 transformer on the input.
Dave - WB6DHW
--- In [email protected], "chutton12000" <[EMAIL PROTECTED]> wrote:
>
> David:
>
> Can you tell us a little bit about the bandpass filter?
> Butterworhth, Chebychev or Elliptic? How many orders?
>
> I'd be interested in acquiring a few of them if they are being laid
> out in a way that makes filter prototyping easy: pads for both the
> common Toko tunable inductors and inductors with leads and small
> toroids.
>
> Chuck
>
[Non-text portions of this message have been removed]
------------------------ Yahoo! Groups Sponsor --------------------~-->
Home is just a click away. Make Yahoo! your home page now.
http://us.click.yahoo.com/DHchtC/3FxNAA/yQLSAA/ELTolB/TM
--------------------------------------------------------------------~->
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/soft_radio/
<*> To unsubscribe from this group, send an email to:
[EMAIL PROTECTED]
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
