[Elecraft] To zero beat or not to zero beat

[F5vjc]

I wondered if someone (Mike W5JR) would mention the N1MM feature to
randomise spots frequencies on the Bandmap so that you DONT call on Zero
beat.

I use this feature and it works of course but you often wonder if this is
the best tactic especially if you feel you are not getting a response
within a couple of calls.

Given that some ops will be listening with a very narrow filter at least
some of the time, you may not be in their filter passband and so not heard
if calling off frequency.

Thoughts anyone?

73 F5VJC

On Fri, 22 Feb 2019 at 02:14, Bob McGraw K4TAX <rmcgraw at blomand.net> wrote:

> Most of my CW work is on nets.   Otherwise, pse QNZ.   If one is not on
> frequency, one is not heard.
>
> 73
>
> Bob, K4TAX
>
>
>
> On 2/21/2019 6:54 PM, Jim Brown wrote:
> > On 2/21/2019 4:04 PM, Bob McGraw K4TAX wrote:
> >> And in a pileup the RX bandwidth is narrower.  At 50 Hz BW any 12 to
> >> 15 Hz away aren't heard.
> >
> > Not really, and for several reasons. First, many skilled CW ops use a
> > fairly wide bandwidth in a pileup so that they hear off-frequency
> > callers. Second, even at the 200 Hz IF setting and 250Hz roofing
> > filter I routinely use, the -6dB bandwidth is on the order of 250 Hz
> > (it's generally well known that the 250 Hz filter is closer to 350
> > Hz). Given that 6 dB is roughly one S-unit, the practical RX bandwidth
> > is more like 250 Hz for reasonably strong signals, and reasonably
> > strong signals farther off frequency are going to be heard. Third, in
> > a pileup, the WORST place to be is zero-beat, because that's where
> > most stations call, and everyone's TX blends into a big mush.
> >
> > You DO want to zero-beat the CQer if you're weak and there are no
> > other callers.
> >
> > 73, Jim K9YC
> >
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