UmTRX power adaptor

Alexander Chemeris alexander.chemeris at
Sat Oct 27 12:23:34 UTC 2012

And surely I forgot an important question.

Does anyone have experience with sourcing power adapters like the one
we need? If you have a proven provider for PSUs in Europe or Asia -
please let us know, this may save us quite some time and headache.

On Sat, Oct 27, 2012 at 4:03 PM, Alexander Chemeris
<alexander.chemeris at> wrote:
> Hi all,
> UmTRXv2 samples for early adopters should be ready in just few weeks
> and we're looking at what to put an a package. Below is a preliminary
> list of items which I think we should include. Please comment on the
> list and suggest particular items:
>  1. Power supply, 12V-18V DC, >=20W.
> I think it's easier to find a PSU with a standard round DC connector,
> like this one and thus we need a converter cable to our Molex power
> connector.
>  2. Converter cable from the Molex power connector to a standard round
> DC connector.
>  3. U.FL-to-SMA-F pigtail cable.
>  4. Two small antennas - omni or patch. One for Tx and one for Rx.
> Below is a list of items which are non-essential and which we unlikely
> to include in the package for this batch. We do no have them ready yet
> and we don't want to delay shipping.  We focus our effort on polishing
> UmTRX and UmSEL performance and software development which we see as a
> more important tasks at this moment.
>  1. Duplexer. Without a power amplifier UmTRXv2 is pretty low-power
> (50-100mW) and thus it works good enough without a duplexer in a
> normal environment. For our testing we use two small antennas - one
> for Rx and one for Tx without any issues.
>  2. Enclosure. We'd love to have a nice table-top enclosure for UmTRX,
> but it requires a significant effort to source, design and assemble.
>  3. UmSEL. It's not clear whether we will have UmSEL production setup
> in time. Software to control UmSEL is yet to be developed as well.
> Since it's only an improvement frontend, I don't think we should
> include it into the basic package.
> If you want to help us make those items faster - by all means feel
> free to offer your help! :)
>  * If you provide a valuable contribution, you'll get the item you're
> contributed to for free.
>  * If you provide significant contributions on a regular basis, you'll
> get all our future hardware versions for free and recognition on the
> web-site.
> --
> Regards,
> Alexander Chemeris.
> CEO, Fairwaves LLC / ООО УмРадио

Alexander Chemeris.
CEO, Fairwaves LLC / ООО УмРадио

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