With that much room, I would elect on a rhobic, full wave at 320 meters 100 foot up.
VLF I doubt would compare. A good 6 Db gain over your inverted V.
Your preselector sounds decent enough. BTW what amp are you using ?
cheers
I think maybe you are thinking of a full wave Sky Loop, and not a Rhombic?
In order for it to be a Rhombic each leg really has to be something more than one wavelength (each leg has to be long enough to start developing some directionality on its own), typically you don't get decent results until you are well over a full wavelength per leg, and optimal is more like 4+ wavelengths per leg.
At 320 meters and one wavelength per leg you are talking about roughly 1050 feet per leg, or at least 4200 feet of total wire in the Rhombic. Call it an area about 1100 feet wide and 1600 feet long. For a minimally effective Rhombic. And you really need twice that size, or more, to make it worth the effort.
There is a tad bit of difference, in size and in effort, between a 550 foot inverted V and a 4200+ foot Rhombic
On the other hand, a full wave, 320 meter, Sky Loop would be about 265 feet per side, and probably have lower noise than the half wave inverted V
T!
