UmTRX prototypes cost

Alexander Chemeris alexander.chemeris at
Sun Jul 15 15:50:02 UTC 2012

Hi Jean-Samuel,

This is very good news! It means we've met the target cost price and
we haven't compromised functionality.

Could you ask the fab how much would it cost to put the board into an
enclosure like this, including the front panel and the rear panel
drilling and engraving?$productCard/dimensionParameters/index.xhtml

The idea is to sell it to general public in small quantities for in-lab use.

On Sun, Jul 15, 2012 at 7:08 PM, Jean-Samuel Najnudel - BJT PARTNERS
SARL <jsn at> wrote:
> Hi Alexander,
> Total cost for production is approximately 10000 Euros for 20 units,
> including about 1000 Euros Non Recuring Costs. Approximate unit cost for
> sample batches (6 and 14 units each) is a bit bellow 500 Euros.
> If we do not need to change the PCB, unit cost will be around 440 Euros for
> 20 units batches.
> If we make 50 or 100 units batches, cost could be a bit lower but not that
> much.
> We could expect to save on the TCD-4029-26.0M. Today, we pay it about 15
> Euros because of our low volume. For 50 or 100 units, we could buy this part
> directly from Pletronics and save about 5 or 6 Euros per unit.
> We could also save on the PCB. For 20 units, cost is 32 Euros but we could
> expect to save 5 to 10 Euros on it.
> On all other components, we could expect something like about 10 to 15 Euros
> extra savings.
> For 50 units batches instead of 20 units, we could also save about 4 Euros
> per board on the cost the fab charges for loading the assembly machines.
> For 50 units batches, we could achieve a unit production cost at 500 USD.
> Anyway, please find enclosed a few details about our production costs. You
> can see fab costs are quite reasonable expecially for our low and medium
> volumes. This cost structure is really convenient to make our samples and
> gradually ramp up our production volumes. In case we reach much higher
> volumes in the future, I am quite confident we could bargain a bit more the
> fab costs and certainly also save a bit more on the components sourcing
> costs. Except for the low cost femtocells market, I really believe this cost
> structure will allow you to compete on the market in good conditions.
> You would need to add the cost of the enclosure, the PSU, the diversity and
> selectivity RF daughter board we need to pass the spec and the CPU mother
> board we need to run the Transceiver and OpenBTS. You should expect a total
> cost around 800 USD excluding the frontend (PA+LNA+duplexers).
> For your information, the dual TRX outdoor enclosure frontend with 10 Watts
> PA I can get from my Chinese supplier costs 810 USD + shipping.
> Please do not hesitate to contact me if you need any extra figures or
> information.
> Best regards.
> Jean-Samuel.
> :-)
> On Sun, Jul 15, 2012 at 9:08 AM, Alexander Chemeris
> <alexander.chemeris at> wrote:
>> Hi Jean-Samuel,
>> Could you share the prices you get for UmTRX from your fab for this
>> batch of prototypes and for the next batches? We have to understand
>> the cost price to see what could we offer to customers.
>> --
>> Regards,
>> Alexander Chemeris.
>> CEO, Fairwaves LLC / ООО УмРадио

Alexander Chemeris.
CEO, Fairwaves LLC / ООО УмРадио

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