Following a suspicion that one of my K2 radio’s was a little deaf, Tony/G0OPB and myself set out to measure the Minimum Discernible Signal (MDS) on my two Elecraft K2 radios: serial numbers 997 and 4891.
1. K2’s tuned with PreAmp = ON, Mode = CW, Filter = 700Hz.
2. Signal Generator: HP 8640B fed with coax via an attenuator into each K2 in turn.
3. The Signal Generator was set at -120dBm output and the switched attenuator used to control the signal level into the radio.
4. A signal generator frequency was chosen on each contest band, 160m through to 10m. The K2 being tested was tuned to the Sig Gen and a note was made of the lowest signal level that could be heard.
|K2 Serial No.||160||80||40||20||15||10|
Both K2s have similar levels of Minimum Discernible Signal (MDS) and are well within the figure stated by Elecraft of -130dBm.