[Elecraft] KX3 Filter Blow-By

David Gilbert xdavid at cis-broadband.com
Mon Oct 8 15:04:26 EDT 2012


"I don't have any roofing filters. (I figured any stations weak enough 
for me to need the filter to hear, would never be able to hear me anyway)."

Sorry, but I don't understand that logic.  Let's say that you and I are 
the only ones on the band and we're both weak but readable for each 
other.   A powerful third station fires up 5 kHz away from us, but the 
skip is such that he is much stronger for you than he is for me.  I can 
still hear you fine but you can no longer hear me.

Roofing filters are your friend.  They won't do a thing for splatter but 
they will greatly enhance your rig.

73,
Dave   AB7E



On 10/8/2012 10:46 AM, Jimk8mr at aol.com wrote:
> A recent KX3 owner (# 1677), I've noticed hearing out of passband  signals
> from loud CW stations. I can hear such stations up to several KHz  away. I
> suspect the range is limited by the audio response of the system,  including
> my ears. Both sides of zero beat, though less so on the opposite side  of
> the zero beat.
>   
> In the CA QSO Party this weekend, maybe the loudest 10% of the stations on
> 10 CW Saturday afternoon were leaking through. (I've heard the leakage on
> other  bands as well.)
>   
> I don't have any roofing filters. (I figured any stations weak enough  for
> me to need the filter to hear, would never be able to hear me anyway).
>   
> Is this normal, or is there some shielding or other issue affecting my
> unit? (It is a kit version).
>   
>   
> 73  -  Jim  K8MR



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