[Elecraft] Re: Receivers.

[Lyle Johnson]

>> ...Assuming the use of strong mixers (+50dbm)...

Hmmm.  +50 dBm = +20 dBW = 100 watts!  That's some mixer!!!

>> ...Great will be the day when a DSP unit running at VHF,
>> with a high IP3in etc, and low noise figure  becomes practical.

An interesting approach to this is the SDR-14 from rfspace.  It directly 
  digitizes the entire HF spectrum -- and by using input bandpass 
filters can digitize up through the 222 MHz band.  I have listened to 2 
meter signals on mine.

The front end isn't as strong as a contesting station would need -- yet.

Meanwhile, for high-performance, a strong front-end followed by a 
crystal filter suited to the mode and signal level, enhanced by a DSP 
seems to be the best practical implementation.

Lyle KK7P