[1000mp] New Roofing Filter

[Jan Erik Holm]

Has there been any measurements made? This what
people "thinks" are far too subjective.

/ Jim SM2EKM
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Garry Shapiro wrote:
> One contest weekend is not the last word on a subject, but I also found that
> I was not using the DSP very much during CQP with my MP. I installed the
> roofing filter last week.
> 
> Garry, NI6T
> 
> -----Original Message-----
> From: 1000mp-bounces at mailman.qth.net
> [mailto:1000mp-bounces at mailman.qth.net]On Behalf Of Thomas Beltran
> Sent: Wednesday, October 06, 2004 2:10 PM
> To: All about Yaesu 1000mp
> Subject: Re: [1000mp] New Roofing Filter
> 
> 
> 
> We had a discussion about this after the first filters shipped from Dayton,
> which is when I received mine.  However, now that there are many more in
> circulation, it is probably more relevant to many on the list.  First, the
> filter has an on-board amp that more than makes up for its insertion loss.
> With the front-end mod, my IF gain setting was two steps lower than factory.
> When I exchanged that mod with the roofing filter, I only moved it back up
> one step, so it still requires lower gain than without any mods, i.e., the
> factory setting.  I think it is worth it, but cost v. benefit is such a
> relative thing.  The radio sounds so much clearner now.  I almost never use
> the dsp (on-board or out-board NIR-12), instead, when there is a loud signal
> nearby, I use the NAR1 and the shift control, and if insufficient, I use the
> manual notch (I found that the NIR-12 is much better at dsp filtering, so I
> use the manual notch with the NIR-12 if necessary).  Tom W6EIJ
> 
>