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R: AO-40 < clarification



Hello Jens,

For my 3 turn helix feed i uses 3 mm diameter silver plated copper wire.
The RF current flow on the surface of the wire by skin effect and any bit
of dB help !

73 de i8CVS Domenico

----- Original Message -----
From: Jens H. Jensen <topcat@mail1.stofanet.dk>
To: <amsat-bb@AMSAT.Org>
Sent: Sunday, July 15, 2001 6:14 AM
Subject: Re: [amsat-bb] AO-40 < clarification


> At 05:03 15-07-2001, you wrote:
> >Yes, very nicely earlier tonight (OZ Time)
>
>  From around 2300z, AZ 237 Deg, EL 12 Deg, MA 17, SQ 14 : very loud
> To around     0330z, AZ 263 Deg, EL   5 Deg, MA 78, SQ 33 : very weak with
QSB
>
> Gear: 40cm offset-dish with 3-turn helix mounted on N-female connector,
> directly to LNA MKU232A2, through 4m of 75 coax (N-conn) to AOR AR5000.
>
> Dish is pointed out through the window on the 4.th floor, around 0330 at a
> very bad angle. The helix does not yet have it's reflector/gp at the back,
> just 3 turns of 1.5mm copperwire soldered to the centre-pin of an
N-female.
>
> I wonder if the isolation on the wire has a lot of absorbation, haven't
> removed it.
> Any comments on this?
> It's the kind of wire used to lay out wiring by electricians, inside walls
etc.
>
> What are YOU using, Larry?
>
> 73 de OZ1LRG
>
> ----
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>





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