My crossed parallel loop (Build notes on the Crossed Parallel Loop:
http://www.radiohobbyist.org/blog/?p=2340 ) had a third party version of the LZ1AQ pre-amp, but was never happy with the performance. So today I removed the pre-amp and went back to a passive configuration. I made a custom version of my Cyclops Transformer, with 5 turns on the input and 13 turns on the output, as the loop presents a fairly low impedance. I must say, it's working much better as a passive antenna. Strong signals, and still quite directional, even on HF, I was able to drop CFRX 6070 from S6 to S3. Much more directional on LW and MW of course. I'll seal up the transformer once I am sure I am satisfied with the turns ratio (although I think I am).
This brings up a question - would there be interest in a Cyclops Transformer kit? The PCB, ferrite core, and choice of UHF or F connector. Maybe some wire wrap wire for folks who don't have any magnet wire? Thoughts?