Re: [IRCA] Recent logs from Moody, Texas

[James Niven <niven43@xxxxxxxxx>]

Hi All,

Thanks to all those who offered help and advise to my antenna problem. 
I will add more turns to the xfmr. 

Question: What's the best wire diameter to use for the turns on the torriod?. 

When I say 'dead', I mean no signal level at all on the low end of the MW band, except for my local stations.

Thanks
 
James Niven



----- Original Message ----
From: C B <bevdxer@xxxxxxxxx>
To: Mailing list for the International Radio Club of America <irca@xxxxxxxxxxxxxxxx>
Sent: Tuesday, January 9, 2007 12:41:47 AM
Subject: Re: [IRCA] Recent logs from Moody, Texas


Hi James,

I have used the "43" material with success, at least
through the MW band. I use quite a few of the
Hall-Patch design transformers which consist of an
Amidon FT50-43 wound with a 35 turn primary and an 11
turn secondary. Your turns ratio seems close. I
suspect the major culprit is the termination
resistance. I use 2.5K linear pots tuned/peaked to the
middle of the MW band. This approach has worked fairly
well for me, but certainly not perfect, as the catch
is that the best resistance will vary according to
ground conditions. My EWE's, I have 3, noticably vary
in performance according to the moisture content of
the soil, which varies greatly here. I use a
counterpoise ground wire directly underneath my South
EWE which helps. The siting of my other EWEs don't
afford me that option.

I hope this helps.

73

Craig Barnes

--- James Niven <niven43@xxxxxxxxx> wrote:

> Hi Craig,
> On each antenna there is a 9:1 matching transformer
> with 6 turns on the receiver side and 18 turns on
> the antenna side. The terminating resister is
> 680ohms. The toriod is FT-114-43 purchased from
> Amidon. Each antenna is feed with 4 separate RG6
> runs to a 4 position rotary switch.
> 
> Thanks
>  
> James Niven
> 
> 
> 
> ----- Original Message ----
> From: C B <bevdxer@xxxxxxxxx>
> To: Mailing list for the International Radio Club of
> America <irca@xxxxxxxxxxxxxxxx>
> Sent: Monday, January 8, 2007 7:48:29 PM
> Subject: Re: [IRCA] Recent logs from Moody, Texas
> 
> 
> Hi James,
> 
> Did you equip your EWE with an impedance matching
> transformer and a terminating resistor?
> 
> Craig Barnes
> Wondervu, CO
> 
> --- James Niven <niven43@xxxxxxxxx> wrote:
> 
> > Hi All,
> > 
> > After working on my EWE antenna 10x50x10 in the
> > spade of a + sign, this is 4 antennas. It works
> very
> > well on frequencies above 1350khz and very
> > directional. 
> > Before the EWE was commissioned, I was using a 300
> > foot longwire pointing south.
> > 
> > On 1570khz XERF justs booms in with a monster
> > signal. Now with the EWE, I am able to knock down
> > XERF and I logged KSXT in Loveland CO last night.
> > Tonight I heard a country station with a slogan as
> > "Country Legends 15-70". It just disappeared like
> > changing to night pattern. Anyone know who this
> may
> > be?
> > 
> > On 1600khz I logged KRKE in Albuerque, NM before
> > changing to night pattern with rockin Oldies, nice
> > signal.
> > 
> > I am not sure why the EWE is not working on the
> > lower part of the band, it appears to be dead.
> > Anyone offer some suggestions?
> > 
> > Thanks
> >  
> > James Niven,
> > Moody, Texas
> > 
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