Q900 SDR Radio

The Chinese manufacturer Guohe Electronics, has recently introduced the Q900P portable Amateur radio transceiver for the HF, VHF & UHF bands for the Chinese market.

The price is 2680 Yuan, equivalent to 350 Euro or 380 USD

Below, an automatically english translation of the Q900 product description taken from the Guohe Electronics web site.

Q900 HF VHF UHF SDR Trasceiver

Q900P is an ultra-portable all-modes all-bands radio based on the software defined radio(SDR) technology. The frequency covers all amateur bands from 1.8MHZ-470MHz. The modem mode supports AM FM SSB CW RTTY.

Built-in Bluetooth, can be directly connected to mobile phones, computers, Bluetooth microphones.

HAM-BOX is an independently developed App for smartphone that permit remote control of the Q900 transceiver.

Q900 is an ultra-portable full-frequency full-mode SDR radio.
The HAM-BOX mobile app we developed allows the mobile phone to easily control and play radio stations, it make the operation of the radio more convenient and fast, the radio adopts a full keyboard design, built-in Bluetooth module, Sound card module and communication serial module.

Full support for currently popular radio control software and logging software,
We are working hard to give you more playable space.

Side of the Q900 Radio
Q900 Portable HF VHF UHF SDR

Q900 Features

  1. Real-time spectrum.
  2. Waterfall chart.
  3. Doppler frequency tracking.
    4, using software-defined radio technology (SDR), full-band support SSB, CW, RTTY, AM, FM.
  4. Double frequency conversion circuit structure.
  5. IF width and IF shift hardware and software can be modified to provide powerful IF interference suppression.
  6. DSP digital noise reduction. 8. Built-in 160-6m high-speed automatic antenna tuner.
  7. Built-in electronic key controller, all parameters can be set flexibly.
  8. Built-in sound card with IQ and audio output.
  9. Built-in FLASH memory.
  10. USB TYPEC3.1 interface for power supply and computer connection.
  11. Dual antenna interface (HF / 50MHZ, 144MHZ / 430MHZ).
  12. High accuracy TXCO ± 0.5ppm (-10-60 ℃).
  13. Ultra-wide working voltage range: 5-32VDC.
  14. Built-in GPS / Beidou, GSM, electronic compass (acceleration, angle sensor) (optional)
  15. GPS time (requires optional GPS module).
  16. Built-in UTC clock. 19. Voltage display.
  17. Unique LORA data transmission (requires optional LORA module).
  18. Ultra-light weight: ≤1KG
The Rear of Q900 Radio
Q900 Rear

Standard configuration

Standard FM module, Bluetooth module, Bluetooth microphone Built-in, sound card Built-in, automatic tuning Built-in memory, Optional GPS module, LORA module, electronic compass module, wired microphone.

Q900 Technical Data:

Transmitter parameters
Transmitter architecture: SDR
Transmission mode SSB, CW, RTTY, AM, FM
Frequency resolution 1Hz


Transmission frequency range

  • 1.800-2.000,
  • 3.500-3.900,
  • 5.351.5-5.366.5,
  • 7.000-7.200,
  • 10.100-10.150,
  • 14.000-14.350,
  • 18.068 -- 18.168,
  • 21-21.450,
  • 24.890- 24.990,
  • 28-29.7,
  • 50-54,
  • 144-146,
  • 430-440

Output Power
HF + 6m: SSB: (1-30W),
CW: (1-30W),
FM (1-30W),
AM: (1-5W)
VHF: SSB / CW / FM (0.5-5W)
UHF: SSB / CW / FM (0.5-5W)
TX: 13.8V-5A RX: 13.8V-0.22A typical, 0.3A (highest brightness, audio peak)
Carrier suppression < 50db Stray suppression 1.8-54MHZ: ≥50db 144-146MHZ: ≥60db 430-440MHZ: ≥60db


Receiver parameters
Receive Architecture SDR
Receive mode SSB, CW, RTTY, AM, FM
Receiving frequency range 300KHZ—500MHZ *
IF 20KHZ
Sensitivity * SSB / CW: (BW: 2.4kHz @ 10dB S / N)
0.18uV (1.8-54MHZ), 0.25uV (144-146MHZ), 0.25uV (430-440MHZ)
AM: (BW: 6kHz @ 10dB S / N)
15uV (0.3-1.8MHZ), 2uV (1.8-54MHZ), 2uV (144-146MHZ), 2uV (430-440MHZ)
FM: (BW: 15kHz @ 12dB S / N)
0.5uV (28.0-29.7MHZ), 0.25uV (50-54MHZ), 0.3uV (144-500MHZ), 0.5uV (430-440MHZ)
IF rejection
Memory channels: 999


Image suppression
Audio output power 2 watts (10% distortion rate, 8Ω load, 3KHZ)
Antenna tuner parameters
Tuning frequency range 1.8-54MHZ
Tuning impedance range 16.7Ω--150Ω unbalanced (SWR is better than 1: 3)
Tuning accuracy VSWR: 1: 1.5 or less
Tuning time 2-5S (full segment 10S)
Tuning method: automatic / manual
Spectrum parameters
Spectrum bandwidth 48K
RF Spectrum FFT
Structural parameters
Size 170X120X45mm (excluding protrusions)
Weight < 1KG
Working voltage parameters
Voltage range 5—32V receiving range,
5-12V transmit power limit,
12-18V full power output,
18-32V transmit power limit.

Antenna interface
Antenna interface TNC / BNT / M (optional)

Working environment parameters
Working temperature -10 ℃ to 60 ℃
Working humidity 10% -- 90%
Note *: To be calibrated, the final interpretation right belongs to the manufacturer.

For additional information about the Q900 SDR Amateur Radio Tramsceiver please visit the manufacturer’s web site.

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