[TowerTalk] Detuning booms?

[Billy Cox]

Check your SWR on 10m, with the booms at 90 degrees to 
each other ... that's another "got ya" to watch for.

Does grounding/opening the 40m coax make any difference
as to the 20m SWR changes?

73 de Billy, AA4NU

-----Original Message-----
>From: Michael Dinkelman <mwdink at eskimo.com>
>Hi Steve
>
>I have 2 yagi's, a C31XR and a 3el 40M (old KLM) I just
>refurbished and put up underneath it. As long as the two
>booms are lined up. All is fine. (At least that makes it simple :>)
>If they start pointing in different directions, the
>20M SWR starts rising.
>
>The 40M antenna's boom is about 30+'. I figure it's close
>enough to 1/2 wave on 20M to make a difference. I might be
>able to raise the C31XR a couple more feet on the mast - there
>is about 8' between them now. I expect we'll try that first but
>I don't expect it to make a difference.  The 40M is on a
>Tic Ring and isn't going anywhere for now (it took 3 months
>to align the moon and the stars enough to get it on the tower :>).
>So that'll make  it hard to hang wires off the end.  :>)
>
>At least I have a work around for now - keep 'em lined up while
>I'm on 20M. :>)