tr usdx transceiver 5-Band usdx Multimode QRP Assembled with case by PE1NNZ and DL2MAN

This is an excellent radio, especially for the price. It's tiny and light, perfect for SOTA, EDC, EMCOMM. Upgrade to the beta firmware to get the spectrum scope, and adjust your frequency offset for best results. The noise filter works great, but the little speaker does strain and squeal a bit at volume or with a noisy signal. Not even worth demoting a fraction of a star, especially given how every feature of this radio just shines. Super pleased. I might buy another in green. 73 - K7DAB

There's not much I can say that that the other positive reviews haven't covered about this unique little (literally: it is small!) radio, so I'll try to add my personal spin:This is an SDR implemented in an Atmega328 MCU. If you're unfamiliar with the 328, look up up the specs and blow your mind with this marvel of coding prowess.I purchased this radio to experiment with QRPp regional (NVIS) Reticulum HF message relays on the 6 and 13MHz ISM bands. The radio produces 0.5W from 5V USB, and field strength tests indicate that the ERP from a loaded dipole is within legal limits.I also ordered some inexpensive 5V DC/DC buck converters with USB inputs, to give myself the option of running this at higher power from a USB power brick on the amateur bands. I'm aiming for 9-10V, which should be sufficient for JS8 and Winlink, without straining the finals. (The converters can produce up to ~30V out, more than enough to destroy the radio, so take care if you do the same).I recommend getting some inexpensive usb-c to micro usb adapters, and keeping a few in your go kit. If you're anything like me, you have plenty of old A-to-micro cables, but the micro connectors are worn out. Being able to use standard "C" cables for everything is invaluable.Cons:I wish the radio included a usb-c connector, as having to carry multiple cable types (combined with the frequent micro usb connector failure rate) is frustrating. See my comment about adapters above.Turning the volume to "16" causes self-oscillation; don't do it. And don't expect much from the built-in speaker. Use an external speaker or headphones.This radio isn't for everyone, but its well-built marvel of technology at an irresistible price point. If you're an experienced HF operator and/or looking to get into QRP on the cheap, it's a fun little rig.

Great little rig for RaDAR, SOTA, and POTA ...... running using CW, SSB, digital modes on a QRP rig and or an amp with it when needed =)

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.

The manual is lacking, the latest firmware doesn’t have the same features or look they describe, it functions fine, CAT control partially works. All in all it’s an OK hobby rig and will work, but it’s just not the same as commercially made radios, even the Chinese ones.

I love this rig. It works great. I use headphones, iambic paddles, and power it with a dc to dc converter connected to raspberry pi power supply. Cw only. I only use 20, 30, and 40 meters and this rig is a solid performer. Most qso's do well with the 5 watts, but when I need to, I turn on my MX-P50M 45 WATT linear amp and complete the qso. To activate the amp i short the amp's black and red control wires with a toggle switch. I use the amp with 3 qrp rigs so I don't want to set up any control connection to any particular qrp rig.The Trusdx menu is extremely easy to use without memorizing stuff.

Unit appears to be defective. The CAT control and audio by USB do not function. Vendor said it wasn't his product but her was listed on the item. Returning unit for refund.