Rebuild the antenna this afternoon, fine sunny weather 15 C and after working a few days the length of the antenna for 12/10 was too high, the lobes crept up too high ( over 5/8 on 10...)
So, took off the top, with the Imax 2000 sections, added Titanex alu piping up to 24 feet ( 7.35 meters) and retry.
Strangly the swr on 40 became better was 1:4 now 1:3 and above all mostly within 1:1.2 even 50 MHz...
Compared to the OCF and Imax 2000 on the roof it was decent, the Imax through being on the roof at 40 feet above ground did have om 15 12 and 10 a little higher signal, but barely.
Getting the 24 footer above the roof will clear the groundclutter and the choke balun added ( FT 240 - 43 core with Teflon coax)
A bunch of radials will do the rest.
The 1:4 unun still the same, Ft240 - 43 core with 11 bifilar Teflon wire windings.
Handled 400 watts carrier for 5 minutes without sweating.
So, all in all, 40/30/20/17/15/12/10/50 in one stick...
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