[Elecraft] 1.8 or 2.1 kc Filter

[Tom Childers, N5GE]

On Fri, 11 Jul 2008 17:50:18 -0700 (PDT), Bill W4ZV <btippett at alum.mit.edu>
wrote:

>
>
>
>Tom Childers, N5GE wrote:
>> 
>> I've had 1.8 filters in many different rigs over the years and found that
>> I
>> rarely used them because, in my opinion, they are too narrow for SSB,
>> making it
>> sound tinny to me.
>> 
>
>I'm copying this from the Yahoo Group list because someone recently asked a
>similar question. 
>
>**************************************************
>Before you give up on the 1.8k filter, be sure to try the following:
>
>1. Tune in a station exactly using a wide filter.
>2. Adjust WIDTH = 1800 (or less).
>3. Adjust either SHIFT (my preference) or HI/LO CUT for best audio.
>
>With proper adjustment you can get good intelligibility down to 1500
>Hz. I believe my SHIFT setting is ~200 at ~1800 BW and goes up to 
>~400 at ~1500 BW, but let your own ears be your guide.
>
>I learned this back in my FT-1000MP days and it's absolutely
>necessary for using any rig at low bandwidths on SSB.
>
>I would only recommend a 1.8k for someone interested in contesting or
>perhaps DX-ing on the low bands. Unless you have extremely strong
>stations nearby, the standard 2.7k will still work fine and you can
>always narrow the DSP filter to <1800 when necessary.
>
>73, Bill

That's exactly what I do now with the k3 when the going gets rough on the 2.7
filter due to QRN or QRM.  Personally, I think the 2.7 or 2.8 cranked down to
1.8 is good enough when you want to use a 1.8, but I wouldn't buy one.

I also learned this with an FT1000MP MK V ;O)

73,

Tom, N5GE - SWOT 3537 - Grid EM12jq

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