[amsat-bb] Ettus B210
normanlizeth at gmail.com
Mon Jan 25 21:40:19 UTC 2016
Was looking with a chary eye at the Mitsubishi boards available on the
net. Pulled the trigger on 4 boards and 2 amp controllers from 'pql.
Spent many, many nights browsing his homepages.
Need to decide which part I should mount.
On Mon, Jan 25, 2016 at 2:56 PM, Edward R Cole <kl7uw at acsalaska.net> wrote:
> I looked into the Toshiba Module solution mentioned, and it is a pretty
> decent solution, but my problem with it was filtering. Those modules
> are great but have pretty bad third harmonic and spur rejection. This
> means that final stage filtering will be required to stay within FCC
> limits (I think -60 dBc is the requirement, can't remember off the top
> of my head). The W6PQL reference is fantastic and is closer to a good
> solution because he has the filtering problem solved in his designs (you
> may have to get the filter board separate for the 70cm design, I think
> he includes a filter in the 80W 2m Amp design). For the budget
> conscious, this is the path I would recommend. I would probably look
> into using the Toshiba modules with lower output power (single digit
> Watts) as a driver for something like a Mirage Amp (that I think has the
> final stage filtering built in).
> The W6PQL board is wide-band and one only needs to use proper value bypass
> capacitors and wind coils for 435-MHz. Not saying that is trivial but that
> is all that would be needed for filtering using that pc board. In the past
> others made generic pc boards for using the Toshiba modules. This is going
> to require some engineering to accomplish or you can spend big bucks and go
> the Kuhne Engineering route.
> I assume anyone using the Ettus B210 is willing to do that.
> 73, Ed - KL7UW
> "Kits made by KL7UW"
> Dubus Mag business:
> dubususa at gmail.com
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> are solely those of the author, and do not reflect the official views of
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
More information about the AMSAT-BB