* LA7DFA *            JX7SIX 50MHZ BEACON            * JX7DFA *

JX7SIX came on air 1'st July 2002. The QTH has clear takeoff in nearly all directions. Hopefully it can be used as 'an early indicator' for 'auroral driven' propagations from N-Eu to W/VE, in addition to the more obvious Auroral-E, Sporadic-E and F2 studies.

CALL FREQUENCY AUDIO POWER ANTENNA TRANSMISSION RESPONSIBLE  STATUS
JX7SIX 50.079MHz
Will QSY 50.479 due to new bandplan		 A1A 10W RF Dipole JX7SIX IQ50RX ...... LA7DFA QRT (from 9 Apr 2014)


JX7SIX will be shipped to LA7DFA for modification and repair in April 2014. In order to get the beacon running on 50.479KHz a new oscillator must be installed.

The ID-keyer is broken, and will be repaired or replaced. I hope to get it back on air later in 2014.

 

 

The JX5O 2011 expedition sponsored

an aluminium dipole for the beacon.

1
The dipole is enhanced by a solid fibreglass rod on the inside. (October 2011)

 

This photo is taken in January 2013. The antenna and beacon are still being received in Europe all year and Stateside during summer.

 

 


DATE DATE JX7SIX STATUS REPORTS
18. OCT 2011   QRV - DIPOLE ANTENNA 150/330 DEGREES
5 JULY 2007 18. OCT 2011 QRT - BROKEN ANTENNA
FEB. 2004 25. FEB 2005 QRT - BROKEN ANTENNA
OCTOBER 2003 22. NOV. 2003 QRT - DUE TO MISSING 220V SUPPLY
1. JUNE 2003 18. AUG. 2003 QRT - DUE TO BROKEN ANTENNA BALUN
1. JULY 2002 1. JUNE 2003 QRV 10W ERP - FIRST PERMANENT JX HAM BEACON ON AIR

CREDITS JX7SIX

SM0KAK installed the 50.079 x-tal and shipped the beacon to Jan Mayen island.
ES1II found the rig, removed the RX, RX/TX switch, made the new "front panel", and converted the TX from 37 to 50 MHz.
SM3EQY kept it as spare for SK3SIX, but donated it for JX7SIX when SM0KAK asked him.
ES5PC designed and programmed the keyer, and did final tuning of the PA.
JX7DFA assembled the beacon in a waterproof box, donated the powersupply, made the first antenna and did the final installation.
Geir Heia installed the GP antenna (2005) sponsored by Trident antennas UK/G3SED..

2005: UKSMG has kindly sponsored a fibreglass vertical antenna for the beacon.

Trident antennas, UK (G3SED) have made a special rugged 1/4 wave fibreglass GP for the WX condx at the mountaintop QTH.

QTH 279Masl
Heavy guywires
Wind & Ice dominates
Old ant.
6M ant.

 

Propagation from JX7SIX to NA stored by DXsummit in 2005. According to VE9AA and K1TOL, there were almost daily openings in July/August. AE openings sometimes lasted from 22-06Z. Below is a recording of JX7SIX by VE9AA - tnx Mike.

JX7SIX beacon Auroral-Es
11 July 2005 [.mp3] by VE9AA

 

DATE

TIME

CALL

PROP
21.05.2005
23:22
 VE, K1, K2
AE
07.07.2005
01:18
 VE1
AE
07.07.2005
09:56
 VE1
ES
11.07.2005
00:42
 VE9, K2
AE
16.07.2005
23:59
 VE, K1
AE
17.07.2005
01:00
 VE1
AE
18.07.2005
03:53
 VE9
AE
21.07.2005
00:39
 VE1
AE
03.08.2005
14:52
 K1 (S9!)
ES
06.08.2005
00:02
 VE9, K1
AE
18.08.2005
00:39
 K1
AE

Here is some more info on JX-NA propagations (discussion @ uksmg).
I often used my own call (1992 - 2002) and the CW keyer in a loop on 50.079 as a beacon prior to JX7SIX. The 'JX7DFA beacon' in July 2000 was using 50W and a 6 ele yagi.
ASSEMBLY AT JAN MAYEN

Powersupply 7A, 13.2V
modified by JX7DFA
Keyer, used
by 9U5D before!
50.079 MHz
10W RF output
Map, explaining
the QTH
JX7SIX & 7DFA
ready to go
JX7SIX
Inside
the beacon
First antenna.
INSTALLING JX7SIX IN IQ50RX
JX7SIX is on 'Danielsenkrateret' - 269M asl. The mountain is the remains of a (hopefully) extinct volcano.

Beacon installed
1 July 2002
50MHz dipole
QTH
IQ50rx
Beacon and
VHF radios
Facing Europe
Facing south-west
Facing USA
First antenna
Brielletower
(west)
Cape Wienna
(south/s-w)
Egg island
(east)
Domen/IQ51
(north)
JW, LA & OX 50MHZ BEACONS
JW7SIX beacon (Svalbard)
JW9SIX beacon (Bear isl.)