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LF: Re: Re:GB2CPM

To: [email protected]
Subject: LF: Re: Re:GB2CPM
From: "Finbar O'Connor" <[email protected]>
Date: Mon, 1 Nov 1999 00:09:07 -0000
Reply-to: [email protected]
Sender: <[email protected]>
Hi Peter,
            Great signal  here at Malin Head, heard you working a string of
stations,  you were certainly getting out well up here. Could not get back
to you , as I was working at the salt mines , whilst you were working at the
chalk mines. Hi Hi.
73   Finbar    EI0CF
-----Original Message-----
From: Peter Dodd <[email protected]>
To: [email protected] <[email protected]>
Date: 31 October 1999 23:08
Subject: LF: Re:GB2CPM


From Peter Dodd, G3LDO.
Set up the station at GB2CPM this morning at 0830 using my old Shogun
as the shack. The main problem was the earth/counterpoise and not the
antenna loading coil as I originally thought. The 140m length of wire
laying close to the ground allowed only about 500mA of antenna
current. Worked GW4ALG 589/589 at 0905. Thought I heard DJ5DI. Worked
G3YMC 589/589. Tried to improve the counterpoise by first raising it
above the ground in small trees but antenna current now only 300mA.
Nevertheless worked GW3XDV/P 589/589 (great signal from Mike in a
portable location).
Tried earthing the end of the counterpoise - no good at all. Tried
using earth stake - no good in chalk.
Fixed counterpoise close to ground using rocks - much better.
Readjusted taps on PA output transformer and got nearly one amp
antenna current.
Worked PA0CWP 449/459, PA0SE 589/589, SM6PXJ 549/549, G3KMP 569/599+,
PA2NJN 439/519, G6NB 579/589, G3BDQ 599/599, G3GRO 599/599, DK9DX
329/449 and G8RW 589/599 and finally G8IK449/569.
I also heard DL3FDO calling CQ at 1400hrs but he didnt hear my call.

The QTH is an old chalk quarry, and the inverted L spans a horseshoe
shaped chasm cut into a hill. The open end of the chasm faces north
so I expected there to be a lot of attenuation of signals from the
south. In fact the Loran signals from northern France come pounding
in holding the S meter at S8 on 2.7kHz bandwidth and even S3 on the
narrowest CW bandwidth. All the signals of the DX I worked had to go
through the hill so a predominately chalk hill seems fairly
transparent to LF signals.

The museum is now closed down for the Winter (this Sunday was the
last day it was open and I had audio QRM from steam engines
chuntering around the place!). However the closure will not prevent
operations throughout the winter because I am a volunteer worker there.
I must do something about the counterpoise!
--
Regards, Peter, G3LDO

<[email protected]>





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