The vast majority of the time, DSP filtering is sufficient. You need
the analog filter when there's very strong signals outside of the dsp
filter passband, strong enough that the analog to digital converter
can't handle them. When the going gets that tough, I'd opt for 300hz
but it really is a matter of personal preference.
My experience is that the Collins 500hz and 300hz filters used in the
Omni7 run a little wide - I think the 500hz is more like 600hz and the
300hz is more like 400hz. So the 300hz filter isn't as narrow as you
might think.
Barry N1EU
On Tue, May 15, 2012 at 8:05 PM, Rick - DJ0IP / NJ0IP <Rick@dj0ip.de> wrote:
> There you go James, as I predicted, you have now received all possible
> answers.
> As I said, it is a matter of taste.
> We all have different preferences.
>
> Perhaps Carl has the best suggestion for a beginner in CW.
> Mine was more targeted for someone really seriously CW contesting.
>
> So I will change my answer for now and say go with Carl's proposal, buy the
> 500 Hz filter.
> When you advance, you can always buy the 300 Hz filter later.
>
> 73
> Rick
>
> -----Original Message-----
> From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
> On Behalf Of Carl Moreschi
> Sent: Tuesday, May 15, 2012 9:46 PM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] CW Filters ???
>
> I'm going to go against the grain here and say just buy the 500 hertz
> filter. The 500 hertz filter adds badly needed skirts to the DSP filters.
> I find I almost always use 500 hertz on CW as the filter width.
>
> The 300 hertz filter is rarely used by me. Only when the going gets very
> tough do I find there is an improvement with this filter. I find with the
> 500 hertz filter and a DSP setting of 200, things are close to the best you
> can get.
>
> Carl Moreschi N4PY
> 121 Little Bell Dr.
> Hays, NC 28635
> www.n4py.com
>
> On 5/15/2012 2:53 PM, Richards wrote:
>> I am learning the Code and will soon try CW mode. I shall commence
>> with casual contacts, but eventually want to work CW contests with the
>> big boys at the contest station, with whom I now work phone contacts.
>>
>> I have a stock Omni VII transceiver.
>>
>> QUERY:
>>
>> Should I buy either or both additional 500 Hz and
>> or the 300 Hz mechanical filters?
>>
>>
>> Money is not a big object, but I don't wanna spend more than I must,
>> as that leaves me to buy other goodies for the shack.
>>
>> [ Will this start a big fight ? ] ;-)
>>
>> Thank you in advance.
>>
>> ---------------------------- K8JHR --------------------------
>> _______________________________________________
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>> TenTec@contesting.com
>> http://lists.contesting.com/mailman/listinfo/tentec
>>
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