LF: W1VLF 9 Khz Antenna update

["Paul A. Cianciolo" <paulc@snet.net>]

Stefan,Group.

 

An update on the W1VLF hopefully to be 9 KHZ antenna.

 

 

The 55 meter wire sloping at 45 degrees measured 340 pf as you recall.

The addition of 2 top hat wires has been made, each over 50 meters long with a slope to the ground.

 

Wire 1 is terminates at 11 meters above the ground and wire 2 terminates 20 meters above the ground.

 

Antenna _only_ = 340 pf

 

Antenna and  Wire 1 West  = 650 pf

 

Antenna and  wire 1 West and wire 2  East  = 900 pf

 

L to resonate at 9 KHZ now = 350 mHy.

 

 

The L is now coming down to a reasonable size!!

 

For the next step there are 3 possibilities:

 

1) Change the top 30 meters from a single wire,  to 3 wires spread 1 meter apart at the top to gain perhaps 100 more PF?

 

 

2) Get my neighbors permission to use his tree as a support for the end rope on wire 1.  This will increase wire 1 west  about 40 meters and raise the end from 10 meters to 20 meters. 200 PF more?

 

 

3) Run 2 more wires  Wire 3 Northwest and Wire 4 Northeast  each would be 20 to 30 meters long and terminate at 30 meters high.   These would be over a forest and I am not sure if this is my best option.

It may yield more "C" and lot more losses??

 

Goal is to try to get antenna "C" to 1200 pf or more

 

All ideas welcome.

 

PauLC

W1VLF

 

 

 

-----Original Message-----
From: Stefan Schäfer [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of Stefan Schäfer
Sent: Sunday, April 04, 2010 7:44 AM
To: rsgb_lf_group@blacksheep.org
Subject: AW: Activity 3 Mar 2010

Mike, LF,

 

Wow! 5641km is really impressing! Congrats!!

 

Is there such an activity planned for the "west-stations" as well? We could do the same!

 

I've never been slower than DFCW-10 on LF. Would be interesting :-)

 

73, Stefan/DK7FC

---

Von: owner-rsgb_lf_group@blacksheep.org im Auftrag von Mike Dennison
Gesendet: So 04.04.2010 12:09
An: rsgb_lf_group@blacksheep.org
Betreff: LF: Activity 3 Mar 2010

An excellent day's activity on 137kHz yesterday with 5 countries
received, the furthest easterly station received here and a QSO with
a new country.

In the morining, OE5ODL and DJ6GT were received.

During the UA tests, five stations were logged (see the attached
screen grab - Argo set to QRSS30 and centred on 137.778kHz).
The picture shows (from the top) UA0AET (5641km from me); RA3YO;
RN3AGC; UA4WPF; and EW6GB who was first received as early as 1700UTC.

After the formal test I exchanged 'O' reports with EW6GB at 1902km,
using QRSS10.

Well done to all concerned.

Mike, G3XDV
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