Re: Intermodulation Performance

 

Allison:

 

So, then, are bandpass filters the only option? Are there in-band spurs?

 

David A Posthuma, WD8PUO

 

From: BITX20@groups.io <BITX20@groups.io> On Behalf Of ajparent1/KB1GMX
Sent: Wednesday, August 22, 2018 5:46 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Intermodulation Performance

 

David,

 Will low-pass filters not correct the spurs generated as well as harmonics? Thanks for sharing your wisdom.


No.  Often the spurs are below the cutoff of a low pass frequency , they are low in frequency so they get to pass.
They are their to suppress harmonic and spurs that occur above the cutoff frequency.  Important but half the
job in some cases.

Good looking filter.

Allison

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