[VHFcontesting] We're about to lose 3456 MHz band entirely.

Mark Spencer mark at alignedsolutions.com
Mon Nov 25 20:51:07 EST 2019

Hi Dana.

The pessimistic side of me thinks by lobbying for new exclusive microwave bands and assuming we actually get them, in the long run the amateur community may be helping future commercial interests who will eventually want to take the spectrum over.   The recent moves by some  (that so far seem to have been unsuccessful) to encroach on the 144 MHz band and the historical loss of the bottom 2 MHz of the 220 thru 225 MHz band don't fill me with a lot of confidence about the ability of the amateur community to maintain exclusive allocations in prime RF real estate especially if the amateur use of the frequencies in question is minimal.   Hopefully I am being overly pessimistic.

On the other hand the 70 cm band seems to have a number of other users (such as differential GPS base stations) and I suspect clearing them all out would be a challenge, plus the  radar users are probably going to be reluctant to leave as well.  As others have mentioned I also suspect clearing out the ISM bands would be hard.

I suspect the 23 cm band and the issues vis a vis the Galileo navigation system (probably along with other issues) may present another challenge for ongoing amateur access to at least some of the band for at least some amateurs.  This might be an area where a regional approach might work better than a global one.   The U.S. approach to Galileo usage within the U.S. also seems promising vis a vis amateur access to 23 cm at least in the U.S. 

Anyways thanks to all who are working behind the scenes to help keep our access to the spectrum.  I do appreciate it.

Mark S

Mark Spencer

Aligned Solutions Co.
mark at alignedsolutions.com
604 762 4099

> On Nov 25, 2019, at 5:01 PM, Dana Shtun <ve3dss at hotmail.com> wrote:
> Best thing we could do is go for narrow primary bands within or adjacent to the bands being examined… that said… we do need microwave bands for space communications, as well as terrestrial
> narrow band point to point (aka DX) comms….
> We have been sharing since the end of WW II…so this is nothing new, but sharing with govt radar vs cell tech isn’t quite the same  …. hopefully we can work out a deal….lets make a deal eh.
> Look on the bright side, all kinds of technology will be there for us to utilize as well...
> Dana VE3DS
> Editor Six Metres and Down in TCA
> Custodian VE3ONT
> On Nov 25, 2019, at 15:54, Mark Spencer <mark at alignedsolutions.com> wrote:
> Yes that is a good point re 900 MHz.   Maybe lobbying for additional similar ISM / un licensed or lightly licensed bands that amateurs could have shared allocations in (or perhaps looking for existing allocations that might be shareable) might make sense as a go forwards plan ?  
> That being said if the authorities can be convinced that amateurs deserve additional exclusive microwave allocations that would be ideal.  I am doubtful that will ever happen, but maybe the amateur Emergency communications role might provide a way forwards ?   
> Some of the broad band data communications done by amateurs in support of the EMCOM role that I am aware of is done with wifi type gear operated under amateur rules and that type of useage seems to indicate that shared spectrum is useful to amateurs ?  Some time ago I looked at ways to use wifi gear and PC and smart phone apps to make contest style microwave contacts in the ISM shared bands but there was little interest from others in my area in pursuing this.   
> 73
> Mark S
> mark at alignedsolutions.com
> 604 762 4099
>> On Nov 25, 2019, at 11:48 AM, John Geiger <af5cc2 at gmail.com> wrote:
>> I don't think 900mhz will be of much interest to cellular companies as there is too many other users in that band right now, as it is a ISM band.  Too much RF pollution as it currently is, and too many users to move.  At least I am hoping that is true.
>> Getting congress to stop the 3.4GHZ relocation will be tough when each senator or representative has less than 100 constituents who use 3.4GHZ (many with 0 constituents) a

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