---
product_id: 492561411
title: "Malahit tr usdx transceiver 5-Band usdx Multimode QRP Assembled with case by PE1NNZ and DL2MAN"
brand: "malahit"
price: "£124.48"
currency: GBP
in_stock: true
reviews_count: 11
category: "Malahit"
url: https://www.desertcart.co.uk/products/492561411-malahit-tr-usdx-transceiver-5-band-usdx-multimode-qrp-assembled
store_origin: GB
region: United Kingdom
---

# 5 bands (80/60/40/30/20m) coverage 5W max output @13.8V, 0.5W USB powered MicroUSB CAT & programming interface Malahit tr usdx transceiver 5-Band usdx Multimode QRP Assembled with case by PE1NNZ and DL2MAN

**Brand:** malahit
**Price:** £124.48
**Availability:** ✅ In Stock

## Summary

> 📻 Own the airwaves with the ultimate pocket QRP transceiver!

## Quick Answers

- **What is this?** Malahit tr usdx transceiver 5-Band usdx Multimode QRP Assembled with case by PE1NNZ and DL2MAN by malahit
- **How much does it cost?** £124.48 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/492561411-malahit-tr-usdx-transceiver-5-band-usdx-multimode-qrp-assembled)

## Best For

- malahit enthusiasts

## Why This Product

- Trusted malahit brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Monitoring:** Built-in SWR bridge plus voltage and current sensors keep your setup optimized and safe.
- • **Multi-Mode Mastery:** Supports CW, LSB, USB, AM, and FM for versatile communication across 5 HF bands.
- • **Pocket-sized Powerhouse:** Compact 90x60x30mm design fits your on-the-go lifestyle without compromise.
- • **Seamless PC Integration:** MicroUSB interface enables easy firmware upgrades and digital mode operation with popular software like WSJT-X.
- • **Plug & Play with Custom Flair:** Pre-assembled with a sleek 3D printed orange case and ready-to-use firmware—customize your call sign anytime.

## Overview

The Malahit tr usdx is a cutting-edge 5-band QRP transceiver designed for millennial pros who demand portability and performance. Featuring a compact 3D printed case, multi-mode operation (CW/LSB/USB/AM/FM), and a powerful 5W Class E PA, it delivers reliable communication across 80 to 20 meters. With onboard SWR and power monitoring, plus a MicroUSB interface for firmware updates and PC connectivity, this rig blends vintage ham radio spirit with modern digital convenience—perfect for field ops or urban adventures.

## Description

Overview:The mainboard is version 1.2 and the RF board is version 1.0. In this version change, only the mainboard has been changed to 1.2, while the others remain unchanged.1.(tr)uSDX is the successor of the uSDX Project. It´s the Result of the Collaboration between PE1NNZ and DL2MAN. The design was intended as an easy to build (pre-assembled) Kit.2.The (tr)uSDX is a 5-Band / Mulitmode QRP Transceiver in Pocket Format (90x60x30mm – 140g). It features a highly efficient Class E PA and Supports CW/LSB/USB and AM/FM. Right now it covers 80 /60/40/30/20m and in Future there will be support for 17/15/12/10m as well.3.It is supplied with an OLED Display, onboard Mic, (tiny) onboard speaker and for improvised QSO onboard PTT Key can be used as emergency CW Key.4.Further on, the (tr)uSDX has a (Micro)USB CAT and Programming Interface, and while it produces typically 5W @ 13,8V Power Supply, it can create 0,5W Output from 5V USB Supply alone.5.It is supplied with OnBoard SWR Bridge and Voltage/Current measurement Hardware, to help in tuning and operation.Thanks to DL2MAN and PE2NNZ Contribution. We are approved by original designer.Features:1.Lo Bands:20m/30m/40m/60m/80m,Out of box,Assembled with 3D printed case (orange),raised lettering.2.Aboat Bootloader：Mainboard have been finished the Bootloader and programed the firmware,If you want your call sign to appear on your OLED, then you need to program the call sign by yourself.3.How to program the call sign? Required equipment: 1)tr usdx(serial number is on the bag)2)computer (download AVR-Dudess software on computer)3)usb cable.(Please refer to the instructions in the package for details)Note:If you want to reprogram/upgrade the firmware (or program your call sign to the firmware), you need to follow these steps :①Download the firmware（DL2MAN's page）②Enter the serial number (the serial number is in the package) and download the firmware.③ Install the USB Driver for the CH340 driver and AVR-Dudess software (if the computer prompts that the AVR-Dudess cannot be installed), please use another computer to install it.④Restart the computer and use USB cable to connect the mainboard (the computer will make a ding-dong sound at this time, indicating that the CH340 driver software has been installed successfully. If not, it may be that the USB cable has no data transmission function, try to use another USB data cable).⑤ Open the AVR-Dudess software, and then program the firmware. Please follow the position circled in the picture below, set up the software, and then program.Opening Device Manager under Windows will show the assigned COM-Port(first image below)How to use the RESET function? Step 1: Hold down the encoder (do not release your hand), then turn on the power. Step 2: After displaying the "restart" message on the OLED, release your hand. The above steps will complete the reset.

Review: (tru)SDX A practical, miniscule QRP multi-band/multi-mode transceiver - This transceiver is designed and built exclusively for Amateur Radio use. In most countries, including the USA, you must have a license to transmit with it, although no license is required for listening (in most countries). If you don't have a license, most people won't talk to you, and they, or government officials, may come looking for you unannounced. If you are a skilled operator with QRP antenna skills, you can make contacts worldwide and beyond with this. (tru)SDX is an amazing SDR design manufactured in China with permission and agreement from the authors. It is amazing how many unauthorized, knock-off, and weird variants there are of this design. One of the common knock-offs based on the (tru)SDX software is called "uSDX". (tru)SDX designed to be multi-band, multi-mode., inexpensive, good, and low power/lightweight. It achieves these objectives. To fully appreciate this rig, you need a full blown commercial multi-band, multi-mode rig to compare it to. (tru)SDX has most or all of the features you'd expect to find on such a rig, although it's much harder to operate due to simple controls and the small size. Instead of traditional dedicated controls, you go menu diving with (tru)SDX. If you try to use (tru)SDX with a compromise antenna, you will be operationally challenged to make contacts. I wouldn't make this my first rig; some experience helps with operation and particularly with the advanced features. It can do many things the big fancy rigs can, but it may be more difficult due to the minimalist aspect of the rig. To truly master the (tru)SDX and learn the user interface will take some time and experience in real use. The rig is made by a CW lover for CW operators, according to DL2MAN's website. Add a key and it's great for CW. In a pinch, use the PTT button can be used as a straight key. I use the built-in Iambic keyer software function with an inexpensive paddle made for QRP use. Receive bandwidths of 200Hz to 4KHz can be selected to dig out signals in pileups. There's RIT. There is a primitive spectrum display! The rig even decodes CW and displays it on the screen, which can be helpful to both newbies and experts if the received signal is clean. I've only used this rig on CW, and it is a ton of fun in the field! To make SSB contacts, you'll want an EXCELLENT antenna, linear amp, or both. The way in which the rig generates SSB is, or should be, award winning. Go ahead, delve into this fascinating topic! However, the signal it produces can be tricky in driving a linear amp. A control line for a linear is provided should you wish to go there. I have not tried the SSB mode yet, I've only studied it. So far. I've made CW contacts on 20M and 40M, and was heard on SSB on 40M within the first week. If you have mental problems like me (!) and a good QRP kit you can use this as a CW walkie talkie! So small, and a minimalist's dream. The point of photo #3 with MFJ-269 antenna analyzer is that an optimal antenna is key. If you use an antenna tuner, you'll be paying an additional penalty of signal loss (>10%) thru the antenna tuner and system. Make your antenna so it's resonant without a tuner (good side of a tuner: this rig has poor output filtering and a tuner will help with that by adding Q, at the price of less power out). Some QRP'ers talk endlessly about end-fed and random length antennas you use with an antenna tuner. My least favorite forms of antennae! My experience tells me you're better off to spend the extra effort to put up a dipole. Even if it's not perfect. Inconvenient, yes, but the results are worth it, and no tuner required. This topic is a black hole. Power - you need to take it with you. This (tru)SDX radio runs off of USB2.0 power! All cellular power gear can be brought to bear. You won't get as much transmit output. But, the whole power thing is simplified and you can share batteries and cables with your smartphone. This has turned out to be a much bigger deal than I ever imagined it would be, and it makes it that much more practical to take tru(SDX) with you everywhere you go! Solar cells are fun and practical to take along. Surprisingly, I did not have electronic noise problems when using cell phone USB battery packs. I used ferrite beads. YMMV. What I wish the rig had: * More bands, especially 10 and 15 meters, but that would make the rig bigger * some sort of built in paddle function for Iambic keying * some sort of primitive and mostly tiny output matching, but not a full blown antenna tuner I'm now more than 8 months out with (tru)SDX, and it has changed my ham life. Thanks, DL2MAN / PE1NNZ ! 73, W-2--- ! ._._.
Review: It is a low powered QRP transceiver which works well for its size and price. - Remember this is a QRP rig easy 4watts, sensitive receiver, built in keyer, Morse decoder, speaker is small..quality of audio from speaker is poor, earphone much better. Transmitted audio acceptable. CW keyer works well. As with most new computer controlled devices all changes like power, volume , rate of tuning, cw speed, band changing..all require multiple pushes of buttons to arrive at your choice in the Menu. But it is a fun tiny little efficient rig. I love it.

## Features

- LO Bands:80/60/40/30/20m，Mainboard：1.2 version,RF Board：1.0 version
- Assembled With Case:Out of box,Assembled with 3D printed case (orange),raised lettering.
- Already Bootloader:Mainboard have been finished the Bootloader and programed the firmware.The serial number has been attached to the bag inside the box.
- Call Sign:If you want to program your call sign, you need to read and fully understand the instructions which is in the package.
- Excluding Battery Case:If you want, you can see the Battery Case on another page.
- Power Jack:3.5mm x 1.35mm.
- Firmware Version:1.Official version:programming: No spectrum display.2.Beta version programming: Spectrum display, but the main menu will have slightly fewer other functions than the official version.
- No serial Number on the OLED:We have finished the Bootloader, so the serial number will not be displayed on the OLED.
- How to find the serial number: The plastic bag in the package has a serial number label.If lose the serial number sticker, you can enter the 18 digit "0" during programming to find the original serial number. （000000000000000000 if unknown)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BJ247SNL |
| Antenna | Radio |
| AntennaDescription | Radio |
| Best Sellers Rank | #286 in Portable FRS Two-Way Radios |
| Brand | Malahit |
| Color | Orange |
| Customer Reviews | 4.3 out of 5 stars 191 Reviews |
| Impedance | 50 Ohms |
| Item Weight | 230 Grams |
| Manufacturer | Malahit Tech |
| Maximum Range | 1000 Meters |
| Mfr Part Number | UK-RDMJH7102510BDAAEC |
| Number of Channels | 2 |
| Number of Items | 5 |
| Unit Count | 1.0 Count |
| Warranty Description | 1 years warranty |

## Product Details

- **Antenna:** Radio
- **Brand:** Malahit
- **Color:** Orange
- **Impedance:** 50 Ohms
- **Manufacturer:** Malahit Tech
- **Maximum Range:** 1000 Meters
- **Number of Channels:** 2
- **Number of Items:** 5

## Images

![Malahit tr usdx transceiver 5-Band usdx Multimode QRP Assembled with case by PE1NNZ and DL2MAN - Image 1](https://m.media-amazon.com/images/I/81Sb+lT0hZL.jpg)

## Questions & Answers

**Q: Can I use a 14.4 volt 5A power supply?**
A: Yes, up to 16 volts. Less than one ampere, key down on CW.

**Q: What is max DC voltage this can take? I just bought this on Amazon.
I already have a 14.4 volt AC/DC power supply for my X6100. Will it work?**
A: I have read it will work up to 16 volts. Works at 14.7volts, making 5 watts.

**Q: What is included with this transceiver? What comes in the box when it’s delivered?**
A: Assembled one with 3D printed case (orange)，Plug and play. Include: one unit of assembled rig and one unit DC.

**Q: Can you use a 3s battery with this?**
A: 3S li ion battery pack can be used with this Qrp rig. There are two ways of powering. The first is a usb connection for 5 volts and I believe 1/2 watt out. The second is to use a tubular dc power connector which is supplied with the unit. If you use 12 volts the specs say you will get somewhere near 5watts but I’ve heard rumors in some units it’s a little less wattage. The 3d printed battery boxes that slide on the back of the radio are for 3 18650,s nominal 3.7 v to 4.2 volts max each in series for 11.1 to 12.6 volts. I personally bought a 3S power brick rather then a 3S shrink wrapped type brick.

## Customer Reviews

### ⭐⭐⭐⭐⭐ (tru)SDX A practical, miniscule QRP multi-band/multi-mode transceiver
*by A***N on August 13, 2024*

This transceiver is designed and built exclusively for Amateur Radio use. In most countries, including the USA, you must have a license to transmit with it, although no license is required for listening (in most countries). If you don't have a license, most people won't talk to you, and they, or government officials, may come looking for you unannounced. If you are a skilled operator with QRP antenna skills, you can make contacts worldwide and beyond with this. (tru)SDX is an amazing SDR design manufactured in China with permission and agreement from the authors. It is amazing how many unauthorized, knock-off, and weird variants there are of this design. One of the common knock-offs based on the (tru)SDX software is called "uSDX". (tru)SDX designed to be multi-band, multi-mode., inexpensive, good, and low power/lightweight. It achieves these objectives. To fully appreciate this rig, you need a full blown commercial multi-band, multi-mode rig to compare it to. (tru)SDX has most or all of the features you'd expect to find on such a rig, although it's much harder to operate due to simple controls and the small size. Instead of traditional dedicated controls, you go menu diving with (tru)SDX. If you try to use (tru)SDX with a compromise antenna, you will be operationally challenged to make contacts. I wouldn't make this my first rig; some experience helps with operation and particularly with the advanced features. It can do many things the big fancy rigs can, but it may be more difficult due to the minimalist aspect of the rig. To truly master the (tru)SDX and learn the user interface will take some time and experience in real use. The rig is made by a CW lover for CW operators, according to DL2MAN's website. Add a key and it's great for CW. In a pinch, use the PTT button can be used as a straight key. I use the built-in Iambic keyer software function with an inexpensive paddle made for QRP use. Receive bandwidths of 200Hz to 4KHz can be selected to dig out signals in pileups. There's RIT. There is a primitive spectrum display! The rig even decodes CW and displays it on the screen, which can be helpful to both newbies and experts if the received signal is clean. I've only used this rig on CW, and it is a ton of fun in the field! To make SSB contacts, you'll want an EXCELLENT antenna, linear amp, or both. The way in which the rig generates SSB is, or should be, award winning. Go ahead, delve into this fascinating topic! However, the signal it produces can be tricky in driving a linear amp. A control line for a linear is provided should you wish to go there. I have not tried the SSB mode yet, I've only studied it. So far. I've made CW contacts on 20M and 40M, and was heard on SSB on 40M within the first week. If you have mental problems like me (!) and a good QRP kit you can use this as a CW walkie talkie! So small, and a minimalist's dream. The point of photo #3 with MFJ-269 antenna analyzer is that an optimal antenna is key. If you use an antenna tuner, you'll be paying an additional penalty of signal loss (>10%) thru the antenna tuner and system. Make your antenna so it's resonant without a tuner (good side of a tuner: this rig has poor output filtering and a tuner will help with that by adding Q, at the price of less power out). Some QRP'ers talk endlessly about end-fed and random length antennas you use with an antenna tuner. My least favorite forms of antennae! My experience tells me you're better off to spend the extra effort to put up a dipole. Even if it's not perfect. Inconvenient, yes, but the results are worth it, and no tuner required. This topic is a black hole. Power - you need to take it with you. This (tru)SDX radio runs off of USB2.0 power! All cellular power gear can be brought to bear. You won't get as much transmit output. But, the whole power thing is simplified and you can share batteries and cables with your smartphone. This has turned out to be a much bigger deal than I ever imagined it would be, and it makes it that much more practical to take tru(SDX) with you everywhere you go! Solar cells are fun and practical to take along. Surprisingly, I did not have electronic noise problems when using cell phone USB battery packs. I used ferrite beads. YMMV. What I wish the rig had: * More bands, especially 10 and 15 meters, but that would make the rig bigger * some sort of built in paddle function for Iambic keying * some sort of primitive and mostly tiny output matching, but not a full blown antenna tuner I'm now more than 8 months out with (tru)SDX, and it has changed my ham life. Thanks, DL2MAN / PE1NNZ ! 73, W-2--- ! ._._.

### ⭐⭐⭐⭐⭐ It is a low powered QRP transceiver which works well for its size and price.
*by F***. on July 1, 2025*

Remember this is a QRP rig easy 4watts, sensitive receiver, built in keyer, Morse decoder, speaker is small..quality of audio from speaker is poor, earphone much better. Transmitted audio acceptable. CW keyer works well. As with most new computer controlled devices all changes like power, volume , rate of tuning, cw speed, band changing..all require multiple pushes of buttons to arrive at your choice in the Menu. But it is a fun tiny little efficient rig. I love it.

### ⭐⭐⭐⭐⭐ Nice tiny QRP FT8 & CW multiband transceiver
*by T***D on April 21, 2024*

UPDATE: It is now a year and a half later from date of purchase and in addition to a fun little CW rig, it plays well on FT8. I am using the .200i software that comes with it, an easy connection to a PC laptop with WSJT-X and GridTracker on the side makes a nice digital mode rig. A 5 Watt multi-mode, multi-band transceiver for a modest investment. ORIGINAL 4 STAR REVIEW: A nice experiment in cramming a multi band transceiver into a package the size of a pack of cards… It will do SSB but I am a CW guy and this thing is fun to use. Receiver is sensitive enough. Worked a VK from AZ this morning on 20M with a chunk of wire off the balcony. I also have a QCX+ for 20M. Both have strengths and weaknesses but for a palm of hand radio you can stuff in a shirt pocket along with a wire antenna this one is pretty hard to beat…

## Frequently Bought Together

- tr usdx transceiver 5-Band usdx Multimode QRP Assembled with case by PE1NNZ and DL2MAN
- tr uSDX Transceiver usdx Battery Case Kits by DL2MAN
- Digirig Mobile Cable uSDX, (tr) uSDX radios

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-06-06*