HamGeek USDR+ 5W QRP HF 8-Band SDR Transceiver FT8 USB LSB HF Transceiver without Microphone

Description:
HamGeek USDR+ is a mini 8-band SSB/CW QRP transceiver for radio amateurs. It includes 8 amateur frequencies for receiving and transmitting.

It is easy to carry for outdoor use thanks to ultra-small size. The SDR transceiver is designed with a 4000mAh built-in lithium battery, a 1602N LCD screen and a built-in speaker. It can be connected to a PC to control radio frequencies using digital mode software such as FT8, JS8 and FT4. See the pictures below for specific wiring definition.

It supports 80m, 40m and 20m bands. Its power will be 3-5W when its built-in battery is used. You can use an external power supply, instead of the built-in battery. In the shortwave communication state, when a 13.8V power supply is used, the power of the device will be higher than 3-5W. The closer the frequency is to 10m band, the less power it will have. Any mode of 60m, 30m, 17m, 15m and 10m bands is a gift. AM and FM modes for all frequencies are gifts. Because gifts are not part of the scope of sale, buyers cannot have any disputes about the content of the gifts. Thank you for your understanding!

Features:
– Excellent PCB layout design in line with the principles of high-frequency circuit design to ensure excellent performance
– Whether using internal battery or external 13.8V power supply, it can reach 3-5W in 8 bands. SOT-223 and TO-220 package pads are also reserved for retrofits
– High transmitting efficiency: 80m/60m/40m/30m/20m efficiency is higher than 80%, 17m efficiency is higher than 70%, and 15m/10m efficiency is higher than 60%
– High-precision original TCXO for KDS: Frequency accuracy is better than 1PPM and frequency stability is better than 0.5PPM
– Ultra-small size: 83 x 38 x 124mm/3.3 x 1.5 x 4.9″ (excluding protrusions)
– Abundant interfaces: CAT, PTT OUT, MIC/KEY and K-type handheld microphone
– LPF part is all made of 100V C0G/NP0 capacitors
– It uses original magnetic latching relay for Omron
– The noise of op amp chip is lower than that of the LM4562
– Built-in speaker with cavity
– 11.1V (12.6V) built-in lithium battery
– BNC antenna interface

Functions:
– Support full mode: USB, LSB, CW, AM and FM (SSB mode has good reception effect, poor transmitting effect. AM, CW, and FM modes are gifted and the effects of these modes are not guaranteed)
– DSP filter: 4000, 2500, 1700, 500, 200, 100 and 50Hz pass band
– DSP Functions: Automatic Gain Control (AGC), Noise Reduction (NR), Voice Operated Xmit (VOX), RX Attenuator (ATT), TX Noise Gate, TX Drive Control, Volume Control and dBm/S Meter.
– SSB to side-band/carrier suppression transmission: better than -45dBc, IMD3 (two-tone) -33dBc and reception better than -50dBc
– Support multi-band: continuously adjustable through 10m-80m frequency band (20kHz…99MHz, with performance loss)
– Open-source firmware: built with Ar-duino IDE; experiments are allowed, new features can be added, contributions can be shared via Github; software complexity: 2000 lines of code
– Software-based VOX can be used as quick full control (QSK and semi-QSK operation) or auxiliary RX/TX switched to operate digital mode (no CAT or PTT interface required), external PTT output/PA control-delay with TX
– All-digital and software-based SSB transmission stage: by controlling the phase of SI5351 PLL (via small frequency changes on 800kbits/s I2C) and the amplitude of PA (via PWM PA key shaping circuit)
– All-digital and software-based SDR receiver stage (optional): Sample I/Q (complex) signals from an orthogonal sample detector digital mixer and mathematically perform a 90-degree phase shift (Hilbert transform) in the software and cancel out one by adding a side-band
– Three independent switchable analog front-end receiver attenuators (0dB, -1 3dB, -20dB, -33dB, -53dB, -60dB and -73dB)
– Receiver noise floor MDS: -135dBm at 28MHz (200Hz BW)
– Receiver front-end selectivity: +/-2kHz steep -45dB/decade roll-off from tuning frequency
– Blocking dynamic range: 20kHz offset 123dB and 2kHz offset 78dB
– VFO A/B+RIT and Split, as well as the corresponding relay with filter switching via I2C
– CAT supports (TS-480 protocol for KENWOOD) operation: Currently, the following functions have been assigned to shortcut buttons (L=Left, E=Encoder & R=Right) and menu items: Menu function buttons
1.1 vol
1.2 mode
1.3 filterbw
1.4 band
1.5 tune rate
1.6 vfo mode
1.7 rtt
1.8 agc
1.9 nr
1.10 att
1.11 att2
1.12 s-meter
1.13 swr meter
2.4 semi ask
2.8 practice
3.1 vox
3.2 noise gate
3.3 tx drive
3.5 mox
8.1 ta bias
8.2 pa max
8.3 ref frq
8.4 iq phase
8.6 cat115k
8.7 quad
10.1 light