[Elecraft] K3 CW filters advice

[Joe Subich, W4TV]

You don't say whether you have a subreceiver (and the potential need
to match filter offsets) but I'd recommend the Inrad 500 Hz filter
(a bit wider than the 400) for general use and the Elecraft 200 Hz
filter when you want the maximum selectivity.

If you weren't 98% CW and there was a concern for RTTY, I'd have
suggested the INRAD 400 Hz filters as having a bit better performance
for RTTY at the cost of being marginally tight for general CW.

I found that having both the Elecraft 400 Hz (430-450 Hz nominal) and
250 Hz (350-370 Hz nominal) a complete waste of the second filter as
there is not enough difference to notice.  Even though the shape factor
of Elecraft 200 Hz 5-pole filter is not as good as Inrad's  250 Hz 8
pole filter, the 5-pole filter is still narrower than the 250 Hz filter
at all points on the skirts.

If you don't have the subreceiver and don't plan on getting one, the
pair pf Elecraft 500/200 Hz 5-pole filters offers excellent performance
at a cost effective price compared to the more expensive 8 pole
filters.

73,

    ... Joe, W4TV


On 2/3/2012 3:14 PM, Robert G. Strickland wrote:
> Well, I've decided to get the K3. I've been reading all posts concerning
> filters [and everything about filters]. I'm a 98% CW operator, mostly
> chasing DX and contesting [little pistol]. I'm looking for
> recommendations for (1) a "brick wall" narrow CW filter for contesting
> and weak signal work, and (2) something wider for casual looking around
> and rag chewing. What should I buy? Thanks for any and all comments.
>
> ...robert