I have a wellbrook RX loop here, the Hex is better than the loop all the way down to topband, anyone want to buy a loop lol
73's Ant MWØJZE
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----- Original Message -----
From: "Steve" <steve@...>
Sent: Monday, 27 February, 2012 9:47:17 PM
Subject: [hex-beam] Re: 40m add-on
I, too, find it's often my quietest receive antenna on the lower bands.
But **NEVER** be tempted to try to load it up on those frequencies and run high power. The radiation resistance is so low, and the reactance so high, that if you ever managed to get serious power into the hexbeam you would have an enormous peak voltage across the feedpoint.
A quick theoretical calculation shows 9kV peak for 400W on 40m, and 41.5kV peak for 400W on 80m. In practice, the losses in the coax and/or failure of the choke to prevent common-mode current, would likely protect the hexbeam feed system, but it's not a risk I would want to take!
--- In firstname.lastname@example.org , Darren G0TSM <daz@...> wrote:
> I actually use my 20-10M BB Hexbeam as the Rx antenna on 30M and 40M. I
> have verticals with elevated radials for transmit and they are too noisy
> on receive as I live in town. On 30M I have the classic figure 8 pattern
> with 6-8 S-unit nulls on the sides, and on 40M again the pattern is a
> figure 8 but the nulls are only around 4 S-units. But, its allowing me
> to hear DX that would be lost under noise. I have to use Pre-amp 2 on my
> radio otherwise it sounds like it's not working, but as soon as I switch
> on the preamp then those bands spring to life. Its quite a good compromise.
> 73 Darren G0TSM