Nitin, sorry for the late reply. From my experience of making loudspeaker crossovers, I think you can make a good filter easily. It will be better than a R/C filter with a better roll off and almost no loss in the passband.
http://www.apicsllc.com/apics/Misc/filter2.html
Use non polarised capacitors.. back to back electrolytics will work at low power or better still use mettalised polyester.
For the inductors, wind on a large diameter former (1") with 20 gauge or less. You can better results with a coil wound on ferrite.
Usually values I remember winding is in 1mH range and 1-10uF caps.
You can use a high pass and a low pass in series to get a band pass configuration. This addition to the shack is not rig specific!
I use a LC high pass in all my shack mics. I roll off below 600 Hz, gives me an edge in a pileup.
(Members note that small PCB inductors will not work here, they will be lossy and fail quickly!)
Cheers
Raj, vu2zap
>Has anyone got any simple noise cancelling circuits either dsp or otherwise which would remove the high tones on ssb reception, this includes the background radio noise. I understand that there was an article in the QST November 2011 issue.
>
>73's
>Nitin [VU3TYG]
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