Many thanks to SWLing Post contributor, Georges Ringotte (F6DFZ), who writes:
I received the Belka-DX a few days ago, and it appears to be an outstanding receiver considering its price, its size, and quality of construction.
AGC and audio reproduction are way better than any Chinese SW receiver giving some superb receptions in CW, SSB and AM.
I shall not repeat that other have said, but I must add that the AM2 pseudo synchronous reception seems good to my ears and a bonus with weak signals.
I made some measures :
- MDS is about -127 dBm in SSB mode, slightly better in CW mode
- Sensitivity is constant from 1.5 to 30 MHz
- Image rejection is over 70 dB, better than a KX3 that I tested a few years ago
- I couldn’t measure selectivity because my HP generator is somewhat noisy, but the Belka-DX is very good, and also way better than Chinese receivers
- “S meter” is calibrated as follows: -107 dBm = 10 and -37 dBm = 80, and on this range a 10 change equal a 10 dB change, very accurately. Over -37 dBm, S meter doesn’t move any more.
- Even on my 2x18m center fed or my Hexbeam, I didn’t notice any signs of overload, but as you know the propagation is not outstanding, and BCL stations are not as bothersome as 40 years ago!
- there are a few birdies, but if you move your frequency 100 Hz away, they disappear
In my opinion, considering the superb quality of reception, this receiver is outstanding.
Thank you for sharing this, Georges! Sounds like the Belka-DX is a performer!