Flex uses a similar antenna, a PIXEL Loop, at various Hamventions around the Country to demo their Flex 6XXX radios. Maybe Tim could elaborate on how well it does or does not perform and that will give you a good idea of how a Wellbrook loop will perform with a 6300. I plan on using the Pixel on a Flex 6300 but have not ordered the radio yet. (X-mas gift from momma :-) )
I use a Wellbrook loop for the lower bands and it works just great - I use a PTT line to control my little control box to switch power off the loop when I am transmitting on my vert. wire in a tree. I live in a very restricted area and so everything is low-profile (I painted the Wellbrook with camo-paint.)
I have heard the Pixel works good too, so do your research and make your choice !
I also have a Pixel Pro-1b about 8' above ground level. When there is a lot of noise on the low bands in the summertime it is amazing. A noise floor of S7 will usually drop to S2 when I switch RCVR to the Pixel. On the other hand, when the bands are full of signals around S3-S4, when I flip on the Pixel they jump up to S7-S9. (It lowers the noise floor but amplifies signals.) Use of the interlock is a must - the Pixel preamp is switched off when any transmitter goes into transmit. Yes, the loop is small, but thanks to the 30 dB preamp in the antenna it is not just another loop. Also, the very deep, very narrow null off each side (3-4 degrees wide) is occasionally useful to null out a source of interference.
It's on a cheap rotator about 2m above the ground, about 20m from the house.
Reading this thread, I'm getting the impression the loop actually may work better than a dipole at 30' even in a somewhat noise-free environment. Is this true?
Is the loop low angle or high angle or a mix?
Norm - W7CK