tr usdx transceiver 5-Band Multimode QRP - Compact Portable Radio

Our review of the tr usdx transceiver finds it best suited to portable operators and kit enthusiasts who want a very small, preassembled QRP rig that covers five HF bands. The biggest reason to buy is its pocketable design combined with a capable multimode transceiver setup: CW, LSB, USB and AM/FM are supported and the unit ships assembled in an orange 3D printed case ready to use out of the box. For operators who value compact size and experimental firmware options, this transceiver delivers a lot of capability for its weight and footprint.

Key Features

• Five band coverage: Provides operation on 80/60/40/30/20m now with planned future support for higher bands, giving flexibility for many HF contacts.
• Multimode operation: Supports CW, LSB, USB and AM/FM so users can work a wide range of modes from casual voice to efficient CW contacts.
• Preassembled in case: Ships assembled with an orange 3D printed case and raised lettering so it is ready to carry and use immediately.
• Compact footprint: At roughly pocket format size it is easy to bring on hikes or portable outings where space and weight matter.
• Built-in audio and controls: Includes an OLED display, onboard microphone, tiny speaker and a PTT key usable as an emergency CW key for improvised operation.
• Firmware options: Comes with an official firmware and a beta option offering a spectrum display for users who want extra visual feedback.

Who It's For

This transceiver is ideal for SOTA hikers, portable operators and radio hobbyists who want a capable QRP rig that fits in a pocket and arrives assembled so no soldering is required. It will particularly appeal to those who enjoy experimenting with firmware - the choice of official and beta builds gives a tradeoff between features and menu depth.

It is less suitable for beginners who expect full commercial support or for users who require a large integrated speaker or battery case included in the package; the product omits the external battery case and the OLED does not display a serial number, so some familiarity with programming and the included instructions is helpful.

Pros & Cons

Pros

• Excellent value for a 5-band multimode QRP transceiver in a compact, assembled package.
• Flexible firmware choices let users opt for a stable official build or a beta with spectrum display.
• Onboard mic, speaker and emergency PTT/CW key provide useful out-of-the-box functionality.

Cons

• Sound quality and build impressions are mixed among users, so audio performance may vary by unit.
• The OLED does not show the serial number and an external battery case is not included, which may inconvenience some users.

Specifications

Product type	5-Band Multimode QRP Transceiver
Mainboard	Version 1.2
RF board	Version 1.0
Bands	80/60/40/30/20m (future 17/15/12/10m planned)
Modes	CW, LSB, USB, AM, FM
Case	Assembled with orange 3D printed case
Power jack	3.5mm x 1.35mm

Our Verdict

The tr usdx transceiver is a smart choice for portable operators and experimenters who want a small, ready-to-use QRP rig with multiple modes and firmware flexibility. It offers strong value and practical features for field use, though buyers should expect some variation in audio and build impressions and plan for a separate battery solution if needed.

Frequently Asked Questions

Is the transceiver ready to use out of the box?
Yes, it ships assembled in a 3D printed case with firmware installed and the bootloader programmed, so it is ready to operate once powered.

Can I program my call sign into the unit?
Yes, the package includes instructions for programming the call sign; you should read them fully before attempting to program the device.

Where is the serial number found?
The serial number is on a label inside the plastic bag in the package; the OLED will not display the serial number.