[600MRG] SDRs that work in the 600 meter band?

[Roger Graves]

I modified a SoftRock RXTX to both receive and transmit (1 Watt) on 2200, 630, 160 mtr bands. See:
http://qsl.net/v/ve7vv//Files/RXTX LF-MF Modification.pdf
I use the PowerSDR software (modified version of the software provided by Flex for use with their expensive SDR’s) together with WSJT-x, FLDigig, etc.
I know of one other person who did the mod.
It has been working well for both of us.
Roger