Date: Fri, 20 Jul 2012 11:43:28 +0200
From: Steinar Aanesland <saanes@broadpark.no>
To: "*rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
Message-id: <50092840.8010002@broadpark.no>
MIME-version: 1.0
User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:13.0) Gecko/20120614
 Thunderbird/13.0.1
Subject: LF: MFJ 259B HF antenna analyzer modification
Content-type: text/plain; charset=ISO-8859-1
Content-transfer-encoding: QUOTED-PRINTABLE
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
X-AOL-SCOLL-URL_COUNT: 0  
x-aol-sid: 3039ac1d6019500928747f31
X-AOL-IP: 195.171.43.25
X-AOL-SPF: domain : blacksheep.org SPF : none


Hi Stefan

Is this the MFJ 259B HF antenna analyzer modification?=20

http://www.we0h.us/Amateur_Radio_stuff/MFJ/MFJ-259B/LF-MF-Mods/

la5vna S


Fra: owner-rsgb_lf_group@blacksheep.org
[mailto:owner-rsgb_lf_group@blacksheep.org] P=E5 vegne av Stefan Sch=
=E4fer
Sendt: 19. juli 2012 01:55
Til: rsgb_lf_group@blacksheep.org
Emne: Re: LF: 630 meter full size dipole

Hi Jay,

Interesting, thanks for the info!! Yes and that could be a real
alternative for those with a small garden and a stressing XYL. The wi=
re
for the dipole can be quite small and fits into a backpack.
Then its a question of the dependency of the antenna efficiency as a
function of the ground conductivity. This will be one of the interest=
ing
results!
10m above ground is not much for a 630m band dipole but if the
difference to 2m above the ground is just a few dB, one can easily
through out the wire during taking a walk and can do some MF /p
operation, without a kite, without the need for a free field, without=
 a
tower, without a good earth (connection)... Many advantages! Maybe...

BTW i have also modified (extended) the range of my MFJ 259B HF anten=
na
analyzer to cover MF (313...658 kHz) and LF (103...209 kHz). This
modification is done very easy! I'm not sure how accurate the
measurements are in that range but maybe it gives me some ideas "wher=
e i
am".

Looking forward to that test!

73, Stefan/DK7FC
Stefan
=20
This may be of interest for your next exploit ...
=20
Looking back in my 500 kHz log, I see that on 1/3/2010 I had a CW QSO
with WD2XSH/35 in South Dakota ... who was running a full size 600 me=
ter
dipole. As I recall his antenna was relatively low at 30 or 40' above
ground and he was running only 50 or 100 watts. His signal was weak b=
ut
solid copy over the few nights that he was active. Distance was 1210 =
mi
/ 1950kM. Believe his antenna was 'out in the open' as he apparently
owns a good sized farm.
=20
Jay W1VD  WD2XNS  WE2XGR/2  =20
=20