[Elecraft] K3: best roofing filter on RTTY

[dmoes at nexicom.net]

I left it there because I am using a pan adapter to find stations. so 
I don't need to see anything wider on MMTTY display.   but before I 
had it I would toggle between wide and narrow filter width as needed 
by pressing [hold]  the  width control knob

David Moes
VE3DVY


> --- Original message ---
> Subject: Re: [Elecraft] K3: best roofing filter on RTTY
> From: Ted Edwards W3TB <w3tb.ted at gmail.com>
> To: <dmoes at nexicom.net>
> Cc: Elecraft Reflector <elecraft at mailman.qth.net>
> Date: Monday, 16/02/2015  2:01 PM
>
>
>
> I also like the 400 Hz filter, but when tuning around like in this 
> weekend's CQ WPX RTTY then I went much wider.
>
> With that width came lots of noise.  What is a good idea on that?
>
> And thanks ahead of time.
>
>
> On Mon, Feb 16, 2015 at 12:47 PM, <dmoes at nexicom.net> wrote:
>>
>>
>>
>>
>> David Moes
>> VE3DVY
>>
>> Since I find that the 8 pole 250 Hz filter is really a bit wider   I 
>> tell my K3 in filter setups its 300hz It  works fine for me this way 
>> including on RTTY
>>
>> During the WPXRTTY this weekend   I had good luck copying weak signals 
>> right beside a power house signal using the 250hz filter.
>>
>>>
>>>
>>> --- Original message ---
>>> Subject: Re: [Elecraft] K3: best roofing filter on RTTY
>>> From: Jim's Desktop <w0eb at cox.net>
>>> To: <elecraft at mailman.qth.net>
>>> Date: Monday, 16/02/2015  9:49 AM
>>>
>>> The narrowest filter I have in both receivers is the 400 Hz one.  I
>>> borrowed a K3 that had a 250 Hz filter in it once and tried it on 
>>> RTTY.
>>> It works, but it's right on the margin of being too narrow.  If 
>>> someone
>>> is using one of the older Packet TNC's that have RTTY mode in them 
>>> (they
>>> used 200 Hz shift instead of 170 and there are still a lot of them out
>>> there) it's really hard to get them tuned in with a 250 Hz filter,
>>> especially in weak signal/selective QSB situations.  The 400 Hz filter
>>> doesn't seem to have that limitation though it does let slightly more
>>> noise in (easily handled with the DSP filters anyway.
>>>
>>> Jim - W0EB
>>>>
>>>>
>>>>
>>>> On 2/15/2015 11:35 PM, David Cole wrote:
>>>>>
>>>>>
>>>>> Hi,
>>>>> I ordered and use the 400 for RTTY, I suspect the 250 is a bit to
>>>>> narrow.
>>>>
>>
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>
>
> --
>
>
>
> 73 de Ted Edwards, W3TB and GØPWW
>
> and thinking about operating CW:
> "Do today what others won't,
> so you can do tomorrow what others can't."