Re: RF power chain mods and improvements..

Jerry Gaffke
 

There are other 45mhz filters out there that might be more suitable for this 45mhz attenuation trick.
This post suggests we are primarily concerned with the stopband 2mhz out:
    https://groups.io/g/BITX20/message/33203


On Thu, May 24, 2018 at 09:58 am, Jerry Gaffke wrote:
It's +/- 7khz on the 3dB bandwidth, +/- 28 khz for an 18 dB stopband
So we're going from roughly 3dB to 18 db while transitioning across 28-7.5=20.5 khz.
If that were linear (it's not), a 2khz chunk of that skirt would have a variance of (18dB-3dB)*2khz/20.5khz = 1.46dB

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