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QST Review - NF Error?

George KF2T
George KF2T Member ✭✭✭
edited February 2019 in FLEX-6000 Signature Series
Looking at the Noise Figures posted in the 6500 QST Product Review, I'm struck by the values 27/21/11 dB (preamp off/1/2). Surely that's incorrect. Anyone have a lead on the real values?

Answers

  • KF4HR
    KF4HR Member ✭✭
    edited February 2017
    I'm curious if the 6500's noise figures they quoted were different from QST's review of the 6700 in April 2015?
  • George KF2T
    George KF2T Member ✭✭✭
    edited February 2019
    29/23/12/7 for the 6700 in 2015's review. I suspect this measurement and what I was expecting are two different things. Time to go learn something...
  • N9VC
    N9VC Member ✭✭
    edited February 2019
    Noise figures at HF are not that critical. Go to the ARRL website
    and you'll see similar numbers on any of the HF transceivers.
    Atmospheric noise and what not usually override the noise floor
    of the receiver.
  • George KF2T
    George KF2T Member ✭✭✭
    edited January 2017
    Quite true. My interest in this topic was regarding 50 MHz performance. I've seen some other rigs' reviews with lower published NF values, and wonder if the methodology or results are different for an SDR.
  • Bill W2PKY
    Bill W2PKY Member ✭✭
    edited January 2017
    On my 6500 used a Down East Micro 20db preamp on 6M to assure a low NF.
  • George KF2T
    George KF2T Member ✭✭✭
    edited January 2017
    I have an ARR preamp on the RXA loop for 6m. Definitely lower noise, as one would expect. 

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