The W6LVP antenna running on http://ka7u.us.no-ip.org:8074 is doing almost as good a job as the 210' G5RV dipole. The dipole gets down to 15KHz whereas the W6LVP gets down to 60KHz. Generally the G5RV provides better S/N ratios up to 14MHz and the W6LVP does better above 14MHz. This is not a rule though, merely a perception based on observation since it has been up. At any given time either antenna might seem better than the other on a given frequency.
The result for me is that the small footprint W6LVP Magnetic Loop provides almost as good a signal to the KiwiSDR as the very large footprint G5RV. In my mind this makes the W6LVP the more desirable antenna for aesthetic reasons and still provides excellent 60KHz through 30MHz reception.
Thanks for posting this information. Currently I have one notch filter set for 1380 KHz. It was the only local station causing problems. The filter I made is bit wide a attenuates a wider bandwidth than I would like. Still it is quite useful. The 4-1 transformer idea is a great bit of information.