Top band DX-ing is real ham radio challenge. 160m is also referred as the "Gentleman's band"...
160 meters - DX-ing on the Edge...

Říjen 2008

5J0T - Bajo Nuevo and Roncador Bank

25. října 2008 v 22:47 | Petr, OK1RP |  Band reports
5J0T will be active from Bajo Nuevo and Roncador Bank
(HK0, San Andres region) between Nov 19 and Dec 02, 2008.
We will have a strong low band focus, similar to out 2007
VK9WWI operation. Operators will be HA7RY, HA8MT, HK3JJH
and AA7JV.

Plans are to operate from November 18 to 21 from Roncador Bank (IOTA NA-133), and between November 23 and December 02 from Bajo Nuevo (NA-132). Both reefs are part of San Andres region, HK0. The four person DXpedition will focus on low band operation, especially 160 meters, and will be operated by AA7JV, HA7RY, HK3JJH and HA8MT. (AA7JV and HA7RY were behind last year's VK9WWI Willis Islets operation.) The group will operate two stations from 160 to 6 m.

Bajo Nuevo is is a small reef that is part of Colombia (HK0) and is located 250 miles south of Jamaica in the central Caribbean. It is administered by the Colombian Navy. The reef contains a number of small barren sand cays, one of which carries a navigation light. The station will be setup on this cay. Antennas will be erected in the shallow water of the surrounding lagoon. (This is to save on radial wires! :-)

Roncador Bank is located 150 miles south-west of Bajo Nuevo.

The Bajo Nuevo (New Bank) is a shallow platform structure located 110 km east from Alice Shoal and 235 km southwest from Jamaica. The formation consists of two separate banks that are divided by a deep channel of 1.4 km in width. The eastern sides of both banks are marked by pronounced breaking reef crests that protect the shallow reef environments behind them. The reef was a part of the US military and was returned to Columbia in 1982.
Bajo Nuevo was re-discovered by the British Glover in 1660. Bajo Nuevo is about 26 km long and 9 km wide, covering km². The most prominent cay is Low Cay, 300 m long and 40 m wide. The reef was first shown on Dutch maps, dated to 1634, but first shown by here present name in 1654. In 1985 an American Expedition went to Bajo Nuevo in order to look for treasure ships. No more was heard about the 12 people. Till now it is unknown, if they found a treasure and went into the underground, or if they were murdered by pirates, operating in these area.
Today the cays are frequently visited by lobster fishers. A Lighttower, 69 ft high, stands on Low Cay (15N51, 78W38). Low Cay is about 5 ft high and barren. It is composited of broken coral, driftwood, and sand.

Electric power will be supplied by two generators. One will supply 120V and the other 230V for the amplifiers. 2 battery chargers and 4 batteries serve as backup.
The radios will be a Elecraft K3, an Icom IC-746PRO and a IC-706. We will have a Tokyo H.power amplifier with a homemede 2kW auto tuner and a SGC 500W amplifier with a matching auto tuner.
Antennas will be solely verticals mounted over salt water. We will bring two 18m and two 12m Spiderpoles. Six meter antenna will be DuneStar Rover 6 Quad.

5J0T QSL via HA7RY either direct or via bureau
Mailing address:
Tamas Pekarik
Alagi ut 15.
H-2151 Fot

More informations available on

Good luck on Top band.

73 - Petr, OK1RP

9L1X - Sierra Leone, Sherbro isl. / AF-056

18. října 2008 v 21:29 | Petr, OK1RP |  Band reports

The 9L1X crew finally could work on 160 in spite of storms and very high
noise. More than 60 qso are on the log..
They recommend to spread your call on the band as yesterday night all
signals were piled on 1830,5 up and it was almost impossible to catch
the callsign.
Please spread out your call +5 - 10 and follow the operator instruction.
The band is very noisy then help them and be patient.

73, Alfeo I1HJT

Information published originaly on

73 - Petr, OK1RP

The 2009 CQWW 160 Meter Contest

18. října 2008 v 21:20 | Petr, OK1RP |  Home
The 2009 CQWW 160 Meter Contest has undergone major changes this year.

As many of you know, K4JRB has retired from the directorship, and I
have taken over.

Dave has been very helpful in the transition, and is still working on
certificates/trophies from prior contests.

Please be patient if you are waiting for an award, it should be coming shortly.

We have established a new web site at

Please visit the site for important information, including the full
text of the new rules.

You will find records and log info there also.

Here are some of the rule change highlights:

1. The dates for the 2009 SSB contest are a week later than usual to
avoid conflict with the ARRL DX Contest. This is a calendar anomaly
and will return to the last full weekend in February in 2010.

2. The start and end times of the contests have been shifted two
hours earlier in response to requests from the 160 contesting community.

3. The exchange for DX stations has been changed from RS(T) & country
to RS(T) and CQ zone.

4. A new single-operator/assisted class has been added to permit the
use of clusters, skimmers, etc.

5. A 40-hour maximum operating period has been added for multi-op entries.

6. Provisions have been added regarding remote operation

Please note there has been no change in multipliers or qso points.
We hope these changes will help to improve the contest, and stay
consistent with the rules for other CQ contests.

73, Andy N2NT
CQ160 Contest Director

73 - Petr, OK1RP

Drift nets fishing beacons

15. října 2008 v 15:31 | Petr, OK1RP |  Beacons

Radio Buoy System
For long liner, Drift nets fishing vessels, using radio buoy system is effective way to detect the net's position. By connecting radio buoy, TB-558 and TB-308, and a fishing gear, such as long liner and raft with a glass ball, the radio buoy transmits its signal to the fishing vessels. Direction finder, TD-C358, TD-A157 and TD-L2200, can detect the buoy position by homing method and display buoys' direction.
With sele-call radio buoy, TB-558S and TB-308S it is much cost effective and avoid own nets or line are caught by other fishing vessels. The sele-call buoys transmits its answer signal only when they receive calling signal from mother vessels. Calling signal is decided for each sele-call radio buoy and the signal itself is generated by calling signal generator, such as model, TR-L371/371A and new model THR-L400/400-II. THR-L400 can generate calling signal and this model has built-in transmitter, this model can transmit calling signal to call sele-call radio buoy without other external transmitter, such as SSB. In case of using THR-L400-II, by connecting an external transmitter, calling signal is generated by THR-L400-II and transmitted through the external transmitter.
When sele-call radio buoy receive its own calling signal, it starts to transmit answer signal to inform mother vessel from which direction answer signal is transmitted. Then, to detect which direction sele-call radio buoy is flowing, direction finder, such as TD-C358, and TD-A157, is used. Direction finder, detects the buoy's direction and fishing will be completed successfully.
New model, Hybrid Direction Finder, TD-L101 can call sele-call radio buoy and detect the buoy position by its all in one main unit.

Sele-call Radio Buoy System

More informations i will post as soon as I will have prepared.

73 - Petr, OK1RP