Hey Shockwave, you asked Henry for an up-to-date model of the Vector a while back. I haven't modeled the New Vector yet, but will soon. I have modeled the original Sigma 4 from Henry, and just posted some results to my album. If you email me edromans@comcast.net the Eznec model for the JG Pistol that you refer to, I'll send you my Eznec model of the Sigma 4 with a circular hoop, mast, and using original specs for length and diameters. If you don't have the Eznec file, then maybe you could send me the dimensions and/or the JG Manual.
I don't have the dimensions for the JG Pistol and would like to see the bad pattern you refer to. A good friend of mine has a Pistol and he swears how good it is. He is a trouble maker on local channel 19 and this antenna, over several others, gives him plenty of ammo to wage his battles with truckers. I don't agree with his tactics, but that is what he does and that makes me curious in light of your claim.
I haven't fiddled with the Sigma 4 yet to see if I can duplicate your's and Bob's claims for improved gain, or angle, using a longer radiator and longer radials yet, but plan to when I get the Vector 4 successfully modeled.
BTW, I don't find it impossible to model the Sigma 4 up to specs and still see some nice gain at a low angle like we thought a while back. I find that interesting and I was surprised. I can't get the gain that Henery did using the square hoop and the thin wires, but the gain seems good to me and my model shows no segment or geometry errors, since I recently got Eznec5 and can apply more segments.
