[Elecraft] K3: KFL3C-200 filter

[Eric NO3M]

I find the 200Hz filter most useful to knock down adjacent QRM, ie. 
during crowded contest conditions, not so much dealing with QRN. Try 
opening up the bandwidth to 500-700Hz when QRN is bad.  The brain 
generally does a better job discerning a weak signal when there is more 
noise bandwidth, but of course, depends on the operator.  APF doesn't 
seem particularly useful on very weak signals when a certain amount of 
QRN is present either.

I had decent copy of 8Q7SP on QSB peaks on 160M last night with the 
bandwidth set at 550Hz... no chance with anything much narrower.

73 Eric NO3M

On 11/28/2016 06:39 PM, N2TK, Tony wrote:
> Tnx Ian,
> On 80 and 160M this past weekend had the filter bandwidth set at 200HZ most of the time due to the QRN. The NR helped a little. Just trying to find out if worth the money to buy the new 200 HZ filter if I would really know the difference.
>
> 73,
> N2TK, Tony
>
>