ATS-20+Si4732 All Band Radio Receiver
This little radio is amazing. Having read some reviews, I had to buy one to find out for myself what it was like. Some reviews said it was rubbish, don’t waste your money. Others said it was a brilliant little receiver. It cost £30 which is unbelievably cheap.
Tests results so far are good. I reckon it’s a lovely little radio which works well, even on its own telescopic aerial. If you’re after a communications receiver with excellent selectivity and sensitivity, then this one isn’t for you. However, if, like me, you want a small comms receiver just for fun, then this one is brilliant. AM, FM, USB, LSB. It covers long wave, medium wave the FM band and HF. Scroll down for the video.
Click on the photos for larger images.
Features:
– It has a 0.96″ OLED display.
– Support auto-hold setting function after power failure.
– Internal 3.6V 800mAh polymer lithium battery for stable and sustainable power supply.
– Support USB recharging.
– Equipped with audio output to support 3.5mm earphone
– Also support 8ohm speaker 1.5W output.
– Antenna interface uses SMA interface and the printed circuit board retains the SI4732 package, you can replace the chip by yourselves, and the software is compatible.
– With 22 commercial and ham radio bands pre-configured.
– Audio bandwidth filter 0.5, 1, 1.2, 2.2, 3 and 4Khz.
– BFO Control.
– Frequency step switch (1, 5 and 10KHz)
– Support band: FM, AM (MW and SW) and SSB (LSB and USB)
Protecting the chip:
I was going to fit a couple of BAT41 Schottky diodes, back to back, across the aerial input socket. I’ve heard that the chip is easy zapped by spikes coming down the aerial. This is particularly important when using an outside wire aerial. However, I didn’t want to dismantle the radio to get to the connections so I’ve put the diodes between a BNC plug and a croc clip. I can now safely connect a wire antenna to the croc clip.
Results using my Miniwhip antenna:
I tried the radio on my Miniwhip antenna. The results were excellent, as I’d expected.
Video:
Here’s a quick look at the ATS-20+ receiver.
Frequency coverage:
Continuous through HF or in bands as below:
FM 76.00, 108.00 MHz
LW 100, 510 KHz
MW 520, 1720 KHz
SW 1720, 3500 KHz
SW 3500, 4500 KHz
SW 4500, 5500 KHz
SW 5500, 6300 KHz
SW 6300, 7800 KHz
SW 7800, 10000 KHz
SW 10000, 11000 KHz
SW 11000, 12500 KHz
SW 12500, 13900 KHz
SW 13900, 14500 KHz
SW 14500, 15900 KHz
SW 15900, 17900 KHz
SW 17900, 18300 KHz
SW 18300, 21900 KHz
SW 21900, 26200 KHz
SW 26200, 27900 KHz
SW 27900, 30000 KHz