[600MRG] 630 Meter Band Use

[Edward R Cole]

My band plans have been to use CW from 472 to lower edge of WSPR and 
digital above.  No plans for voice.
But other projects have taken precedence over retuning my invert-L, 
so I am not QRV on 630m.

Antenna loading coil was tuned for 497-502 KHz before ham radio was 
authorized, so it still is tuned there.  I only get about 5-Hz 
bandwidth with fixed tuning which keeps things simple (KISS). So 
expect 472-477 usable bw.

Next summer a new lawn will be put in surrounding my antenna so 
permanent ground wires will be laid allowing 12-month 
operation.  Current ground system has to be rolled up for summer mowing.

73, Ed - KL7UW


At 11:39 AM 11/17/2018, John Langridge wrote:
>Hi Mark,
>
>The original goal which still holds today was to separate wide band
>modes from the weak signal modes as many of us are weak signal DXers.
>WSPR is a fixed passband world wide and while it has gotten crowded
>below where JT9 occurs  its worked very well in spite of the growing
>pains.
>
>Generally speaking, overflow has been to use above the WSPR passband
>for digital mode over flow when the band was busy and signals were
>good like last night.  In fact that happened as a number of stations
>operated FT8 above the WSPR passband around 476.  There is phone
>activity up at the top of the band from time to time and will likely
>become even more of a reality going forward.
>
>475 and down has been a very usable and active CW segment thus far but
>it absolutely is advised when you stay below 475 lest you be steam
>rolled by the JT QSO mode of the week.
>
>So to summarize,
>
>*there is digital mode activity above the WSPR pass band and its
>commonly used in an overflow capacity
>*the WSPR passband is fixed in location
>*weak signal QSO modes  need separation from wide band mode.
>*Generally speaking we seek to harmonize where activity is located to
>make DX QSO's more likely as those regions have their own "recommended
>operating locations"
>
>My recommendation would be for you to setup lower in the band.  CW
>activity is active all the way down to 472.2 some nights.  I tend to
>hang out on 474.5 because like many others, I've operated there for a
>number of years and it create a nice marker for digital modes to
>signal where CW activity often is found so you dont find incursions at
>the bottom of the band.
>
>None of this is set in stone but if you begin making changes and
>trying to move stuff around, you run a great risk of destabilizing the
>whole thing for new operators coming on the band and having seen the
>mess that this causes in the past, its probably best to avoid going
>forward.  Otherwise you have everyone stepping on everyone because
>there will be people out of the loop...
>
>73 and nice to work you the other night.
>
>John KB5NJD..
>
>
>
>On 11/17/18, Mark McKeown <mmckeown at tde.com> wrote:
> > After having been on 630 meters off an on for the last year it seems we
> > could improve our use of the band.  The types of transmission seem to be CW
> > and digital.  There is beginning to be enough activity that we could better
> > use the spectrum we have.  CW is clustered around 474 KHz with digital just
> > above 474 and QRMing is becoming a problem.  With 472 to 479 KHz available
> > to us, why don't the digital transmissions move up to 475.5 KHz or above?
> > It seems to me we are wasting the upper part of the band.  Any thoughts on
> > this?
> >
> > Mark   W0PXM
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73, Ed - KL7UW
   http://www.kl7uw.com
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