[hpsdr] Mercury? - Performance

[Gerd Loch]

I already answered to this question but somehow it did not arrive at the
reflector:
After some changes I find now a noise figure of about 20 dB on the higher
bands up to 6m.
There are some spurs which are mainly derving from the crystal oscillators
(i.e. 12.288 MHz and harmonics) but they do not influence the practical use
on the amateur bands.
This relates to Mercury-EU with the LTC6400-20 as preamplifier and no
external amplifier or bandfilter like Alex.
I only use a bridge wall filter with a cutoff frequency of 55MHz in front of
Mercury-EU.
I have no measurements on strong signal behaviour of Mercury-EU.

With Ozy/Mercury-EU and Penelope on Atlas built into a 15" cabinet I now
have a fully functional 0.5W HPSDR transceiver up to 6m and I am now
designing a (100W or so) amplifier for all bands to complete the TRX. 
 
Gerd, DJ8AY