Message-ID: <38453D7A.309DA868@netscapeonline.co.uk>
Date: Wed, 01 Dec 1999 15:23:38 +0000
From: "malcolmg3kev" <malcolmg3kev@netscapeonline.co.uk>
Organization: Netscape Online member
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To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: OE Activity Report of November 27
References: <3842DD0B.F66B7500@qsl.net>
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Hi Heinz. I was pleased to read your message about your activities on LF
last weekend. I was also pleased that you could hear my signal at 539. I
always listen very carefully but did not hear anything from you. I have
a
very quiet qth but your signal did not stretch this far, otherwise I
would
have heard you and I have also visual facilites.
The antenna here, consists of two inverted L antennas back to back. Each
one
is 32 metres vertical and each one a  top length of 80 metres. Both are
connected at the bottom and also connected to a large diamater 1.4mh
inductor and a further smaller inductor of 0.2 mh in series to the
earth/radial system for fine tuning the system to 50 ohms to feed to the
tx/rx. The matching system is at the base of the vertical and about 150
feet
of 50 ohm  coax is used to feed the TX/RX in the shack.
The RX used normally an icom 706 with a 250 hz narrow IF FILTER and an
external DSP unit allowing me to narrow the b/w to 20 hz.
The TX is home built and consists of dividing  13.6 mhz signal from the
ic706 down by 100 to 136khz and is vfo controlled. The divider is
followed
by a driver and keyer circuit to feed 4 high power mosfets, then into a
LPF
matching device for 50 ohms. The tx is basically the G3YXM approach with
some alterations and is very reliable. The power output is adjustable
from
25w to 800w with my power supply, and I normally run just over 600w. I
have
a comprehensive radial system consisting of a network of insulated 2.5
mm
wire on the ground and some elevated.
I operate normal CW only on LF  although I have computer facilites for
slow
cw and also psk31 plus all the other digital modes.
I am active nearly every day on LF and will listen carefully for signals
from OE land.
73 and good dxing de Mal/G3KEV

Heinz Schnait wrote:

> The 450m wire antenna at OE5ODL, Ossi, is still up! Ossi had already
> worked OK1FIG earlier this day. Meanwhile he has added some more radial
> wires across the neighboring fields. We have made some antenna current
> measurements with a non calibrated ampere meter, which showed a relative
> improvement (absolute numbers not known).
>
> At 1445 we went on the air and heared the finals of a QSO between DJ1ZB
> and DK6NI. I called DK6NI but he was already gone. DJ1ZB, Ha-Jo, came
> back and I also heared G3KEV (rst 539) calling CQ in the background when
> DJ1ZB was not transmitting. I gave G3KEV several calls but no success.
> At abt. 1455 I heared G4GVC cq-ing (rst 429), also no success. We then
> wired up a second power supply in series to increase input voltage of
> the final to 27VDC.
>
> At 1630 I started cq-ing and worked DK6NI, Gerhard from Erlangen with
> some difficulty (rst 339, he gave us 539). Thanks for your patience
> Gerhard! Both G-stations heared before were stronger than DK6NI at the
> time of our QSO. At 1645 I heared HB9ASB cq-ing and called him. He came
> back to G3KEV and gave him a 579 report. No copy of G3KEV here at this
> point of time. At our next cq the output transformer of the final arced
> with a spectacular flash and went up in smoke.
>
> In total we were on the air for maybe 2 hours of operating time, but
> what excitement it was! I am going to wind a new transformer. I think
> that with the increased output power a QSO between OE and G should be
> possible. In general it seems that we have better ears than we have
> voice. We certainly will have to upgrade our transmitter and we hope to
> be on the air the next weekend. At least Ossi will be back as soon as I
> get the transmitter fixed. It is a 45min drive from my home to OE5ODL
> but I never regret doing the trip.
>
> 73 Heinz, OE5EEP
> <oe5eep@qsl.net>