roWaves Technologies

Certified Company ISO 9001-2008

(tr)uSDX 5-band | multimode TRx | 5W | QRP

Apr. 20th, 2022 – Until we solve the issues with the efficiency of the PA stage in roWaves (tr)uSDX kits, all sales for this product (kit / assembled / kit, no case) have been stopped on March 11th, 2022 and are currently on-hold. Accessories for this product can be ordered at any time, if in stock. Deliveries of the existing pre-orders received until March, 11th (ONLY NOT SENT ORDERS) are on-hold, until each customer still awaiting for the kit/assembled (tr)uSDX, confirms sending the product as it is, or requests the cancellation/complete refunding. For customers that already received the kit (and have now working (tr)uSDX products, with only the PA stage efficiency issue) and that do not want to wait for a technical solution(s), please contact us via email for refund proposals. We thank you, and many apologies for this. Our report and official communication on this matter, available HERE.

From original creators of (tr)uSDX, Guido-PE1NNZ & Manuel-DL2MAN, we are offering several options for this beautiful 5-band, pocket-size, multimode QRP SDR TRx, under license CC BY-ND 4.0 (for HW&SW) and CC-BY-SA (for enclosure). Technical support is available ONLY from DL2MAN’s webpage and forum, use these resources with confidence. Accessories available below. Very important: tap (cut threads) “Lower Wall” and “Upper Wall” before putting M3 Screws in, otherwise the case walls might crack because of the pressure of the M3 screws.

➡️ Buying options?

☑️ complete kit: SMD pre-assembled PCBs (all SMD parts soldered) plus all parts needed to finish & assemble the transceiver, 3D printed case included (“orange-lion” color case included)
☑️ assembled: fully functional transceiver, ready for plug-and-play, color case at your choice
☑️ kit, no case: SMD pre-assembled PCBs (all SMD parts soldered) plus all THT parts needed to finish and assemble the transceiver, but you need to 3D print the case

➡️ Do you need accesories?

☑️ 50Ω quality SMA-male to BNC-female adapter (CARF-7) click HERE
☑️ complete “orange-lion” 3D printed case (premium PET-G material, 4pcs. x black anodized M3x14mm screws included) click HERE
☑️ complete “green-army” 3D printed case (premium PET-G material, 4pcs. x black anodized M3x14mm screws included) click HERE
☑️ 3D printed, external battery case, 3pcs. x 14500 battery size (premium PET-G material, all accesories included) click HERE
☑️ DC power supply cable, 40cm long, ROW-CA10 (Lumberg OD 3.4/ ID 1.4mm DC jack installed, 0.7mm red/black wire) click HERE

➡️ Questions?

✔️ how to order: pre-orders, for now
✔️ shipment: we will collect 50-100 pre-orders, before shipping to the customers
✔️ payment methods: credit card / PayPal
✔️ shipping method: DHL Express, worldwide, fast delivery & tracking no. included

➡️ Start of delivery ?

☑️ B1 (1st batch of ~50pcs. kits) is sold-out & delivered, no bootloader installed
☑️ B2 (2nd batch of ~50pcs. kits) is sold-out & delivered, no bootloader installed
☑️ B3 (3rd batch ~100pcs. kits) is sold-out  & delivered, no bootloader installed
☑️ B4 (4th batch ~50pcs kits) is sold-out (delivery only on customer pre-approval/ request), bootloader installed
☑️ B5 (5th batch ~ 20pcs. assembled units) is sold-out (partial delivery only on customer pre-approval/ request) 
☑️ B6 (6th batch ~50pcs. kits HamRadio 2.0 exclusive sell-out lot) is sold-out (partial delivery only on customer pre-approval/ request) bootloader installed

How can you support the developers & give credit for their exceptional work on (tr)uSDX?
Manuel, DL2MAN:
Guido, PE1NNZ:
Price :

420,50 lei647,00 lei (excl. VAT)


(tr)uSDX expected parameters (finished product), technical specs taken from DL2MAN required approved specs:

roWaves kits / assembled modules can not yet meet the following parameters (in terms of PA stage efficiency):

ParameterSymbolValueUnitConditions / comments
Operating bandsFo80/60/40/30/20
RF Power LevelPo4
W min.
W max.
@5Vdc (e.g. USB powered)
PA stage efficiencyPeff.min. 80%on all bands
Harmonic suppressionHs>-43dBand even better
Side-band suppressionSsmin. 30dBmin. level
Rx Noise LevelNl-106dBno antenna, or even better
PA classPAcEhigh-efficiency ( min. 80%) class-E
Voltage supply rangeVdc 5-15Vdcincl. USB emergency power supply
Tx currentTX Id~500mA@13.8Vdc (80% eff.)
Rx currentRX Id80mAtyp.
Tunning-rotary encoder--
PTTkey--on-board PTT key (emergency key)
SpeakerSPK32R23mm integrated speaker
MicrophoneMICelectret-condenseron-board, no need for external mic.
DimmensionsL x l X H90X60X30mmenclosed
Enclosure color-orange - lion
army - green
PETG3D printed

Pre- assembed PCBs walkthrough, part 1:

Complete Assembly Instructions, part 2:

technical issues assessment  file click here

– assembly instructions: click here

– simple bootloader installation procedure (roWaves): click here

– how to install bootloader (installed in the KITs delivered by roWaves, starting B4 lot): click here

– schematic RF board: click here

– schematic UI board: click here

– how to install firmware after complete assembly & verification: click here

– user manual: click here


Q: What is the status of the efficiency issue on roWaves (tr)uSDX kits?

A: we are aware and working on this issue.There are many circumstances under which these problems occurred (we will get back with an official communicate on this) and we are working to release a “how to fix” document on this matter. A draft/version (1.0) of this document is available at “Downloads” section or by clicking here.

Q: What parts does contain the (tr)uSDX KIT that roWaves delivers?

A: the kit contains all parts needed to assemble and use the radio (case included). Boot-loader not installed. Please see below a list of the parts you will find in the kit delivered to you.

*Please note that exact part no. might change based on parts availability at the manufacturer. All changes will be seen/update in the table below.
1T37-2 Micrometals™ Iron Powder Ring10red/black, OD9.53mm xID5.21mmxH3.25 mm

no wire installed on themlink
2FT37-43 FairRite™ Ferrite Ring3black, red/black, OD9.5mm xID4.75mmxH3.3mmno wire installed on themlink
3BS170 N-ch FET3TO-92usually 3-in-a-row, leadformedlink
4electret condenser microphone14.5 x 2.7mmpay attention to polarity!link
5AZOLED12864-25 128X64 display10.96inch, 22.3x10.1x4.6 mm1x5, 2.54mm pin header soldered on OLEDlink
6MCABS-231-RC 32R 23mm speaker123mm diam.3D ring support for it, in the package, blacklink
7IM43TS relay55Vdc operationlink
8SMA female edge PCB1edge
9Audio Mic/Key/PA Jacks33.5mm female jacks
10rotary encoder EN11-HSM1AF15120ppr/20det.washer +nut includedlink
11momentary tact. switch3
121x14, 2.54mm male pin header12.54mm pitchfor UI board
131x14, 2.54mm female pin header12.54mm pitch, 3.5mm heightfor RF board
142x3, 2.54mm ISP connector12 rows, 3pins / rowISP program. connector
151x2 pin, 2.54mm LCD12.54mm pitchfor OLED fixing
16enameled copper wire Ø0.4mm13.2m longfor 10 x T37-2 and 3 x FT37-43
17M3X14mm screws8black anodizedfor top/bottom lids
183D printed case, army-green or orange-lion16 elementsencoder button + speaker holder includedlink
192 x 0.3mm, 5-7cm long wires2twistedfor speaker connections
20UI populated PCB1SMT populatedall SMT parts soldered by factory
21RF board PCB1SMT populatedall SMT parts soldered by factory

Informații suplimentare

Greutate 150 g
Dimensiuni 10 × 5 × 3 cm

kit, assembled, kit, no case


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