HamGeek TEF6638 DSP Full Band Radio Digital Tuning Radio YL-550 FM/LW/MW/SW DSP Receiver with Screen

HamGeek TEF6638 DSP Full Band Radio Digital Tuning Radio YL-550 FM/LW/MW/SW DSP Receiver with Screen

Features:
- The radiating cone diaphragm cavity loudspeaker is used to make up for the poor sound quality of the previous radio. Thus, its sound quality has been significantly improved.
- HamGeek TEF6638 all band radio is a new product after SAF7751 DSP miniature tuner. It is centered on TEF6638 chip. Its display part adopts LCD12864 scheme (red, green and blue) and Chinese menu. The radio receiver is very versatile, but it is very easy to operate. You can use it without reading the instructions.
- The product size is about 150mm x 100mm x 25mm/5.9" x 3.9" x 1". With an aluminum back shell and a PCB panel. It brings a good experience thanks to its beautiful appearance and reasonable layout. It is designed with 4 layers of PCB. We strictly refer to the official information for the wiring of TEF6638 main chip. Power supply part is made of ultra-low noise LDO, which is filtered by tantalum capacitors. At the same time, various methods are used to suppress the interference caused by the LCD12864 screen. The radio comes with a charging module and a battery protection circuitry. It is powered by two 18650 batteries connected in parallel.
- Performance: It is said that there is almost no difference between TEF6638 and TEF6686 in tuning performance. However, TEF6638 has an additional audio DSP core, enabling powerful audio processing capabilities. It features advanced EQ function with a three-band equalizer for treble, medium and bass, and a better signal-to-noise ratio, ensuring excellent sound quality.
- Sleep: Off, 10 minutes, 20 minutes, 30 minutes, 40 minutes, 60 minutes and 90 minutes.
- Tuning types: Manual mode, automatic tuning, station memory, channel scanning, random channel, and search & save.
- Band selection: LW, MW, SW and FM.

Main Performance and Indicators:
1. Frequency reception and tuning step
- FM: 76-108MHz; Steps: 10K, 50K, and 100K (100K is the default)
- LW: 144-288KHz; Steps: 1K, 3K, and 9K (1K is the default)
- MW: 522-1710KHz; Steps: 1K, 3K, and 9K (9K is the default)
- SW: 2300-27000KHz; Steps: 1K, 5K, and 50K (5K is the default)

2. Sensitivity
- FM: -4dBuV and 0.63uV; IP3: 117dBuv (linear quality factor)
- AM: 30dBuV and 31.6uV; IP3: 145dBuv

3. Adjacent frequency selectivity
- FM: 65dB and ±100kHz.
- AM: 80dB and ±10kHz.

4. SNR
- FM: mono = 75dB; stereo = 65dB (Vi (RF) = 80dBμV and △f = 22.5kHz)
- AM: 68dB (Vi (RF) = 74dBμV and m = 30%)

5. Distortion
- FM: mono < 0.03%; stereo < 0.1%
- AM: < 0.15%
- FM stereo separation: > 50dB

6. Other Parameters
- Output power: 0.5W & THD = 1%
- Quiescent current: 5mA in standby state and 280mA in power-on state
- Power supply: Two built-in 18650 batteries; type-c charging (DC 5V/1A)
- Dimensions: About 150mm x 100mm x 25mm/5.9" x 3.9" x 1" (WxHxT)
- Weight: Approx. 430g/0.9lb

Package Included:
- 1 x Set of DSP Receiver

Packaging Details:
- G.W.: 0.7kg