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...

Březen 2007

Telescoping Fiberglass Mast - part VI. (additional)

18. března 2007 v 13:18 | Petr, OK1RP |  Antennas
Hi all,
as I promised last time, there are additional informations about the VDL-poles from Germany. See the complete informations comes from Chris, DL8MBS...

Picture "Tabelle" to read as follows:
Maximum height telescoped, length of pole detelescoped foer transportation, number of segments, diameter at the base, diameter at the top, Material: non-conductive without carbon (which sounds nice after once trimming a 40m-GP along a fiberglas pole with the wire already cut down to 8 m simply by changing the wire´s distance to the fiberglas with whatever conductive ingredients...), weight and prize with and without tax given for 2003.
Gunter von der Ley Kunststofftechnik
Laupendahler Weg 19
42579 Heiligenhaus-Isenbügel

VDL´s Recommendation: Poles 15m and higher should be guyed at two levels.

Without guying max tension is given as follows:
10m-pole 90 newton
12m-pole 90 newton
15m-pole 75 newton
18m-pole 60 newton
20m-pole 50 newton

Not yet calculated what antenna with what winds that means.

VDL recommends shells for every part at which mounting materials (clamps etc) are fixed at the mast. Shells and other accessories are listed at the accessories-picture as well as tips for the ground mounting (they sound all very conservative for ham means and I will try to translate if needed). I didn´t add the explanation for mounting the guying ring, but that is only needed if you already have a pole, and then it should have been added.

I will post a query for experiences with VDL and other fiberglas-poles on the reflector of Bavarian-Contest-Club with a link to your site and post/translate answers going only to me.

At BCC I found Rudolf, DJ3WE, (once?) using a VDL-pole. Feel free to write him at

At this site is a video of a 12m-VDL-pole with a 50MHz-4L at gale force 10
I use DK9SQ-poles and am satisfied (reaching at least 10m with 2 extension sections available from him), but can´t wait for testing the spiderbeam poles - even if I´m not too happy with the need to guy at least the 18-m-pole which isn´t possible at some of my better /p-qths).

All the best and 73, Chris
Well thank You Chris for all informations and will be great to get some more experiences from the field.
73, Petr OK1RP

Remotely controlled receiver's network...why not?

12. března 2007 v 4:56 | Petr, OK1RP |  Technical topics
As I had some problems with an antenna on 160m and my signal was not good even in EU > I had to find where is the problem. To be sure that my signal is going overseas I used remotely controlled receiver's network which You can find there DX Tunners
To celebrate 10 years of the launch of they are opening the network to everyone on a free to air basis, which means you can access all the online receivers and enjoy the excitement of remotely controlled radio from around the world.
This is for an extended time, and a great opportunity to meet new friends and enjoy interesting radio from around the world.
Well, You will have to registering first but its not the long time procedure and that You can do what You want. I was mentioned about that just few weeks ago by my friend and after first test it sounds like good opportunity to testing antennas, propagation or opennings band to DX areas etc.
The great one is DX Rommele, SE where You can use:
Icom R75 receiver with a switchable array of 7 EWE antennas in all directions. Located in a rural district of southern Sweden. Exceptional noise free reception of the 160 meter bands for the CW mode. Unfortunatelly there are not narrow filters optionally, but You can switch and manage all EWE's antennas to any directions over the world.
Antenna 45*......Far East(Japan)
Antenna 90*......Australia / Asia
Antenna 135*...Middle East
Antenna 180*...East/mid Africa
Antenna 225*...West Africa/Brazil
Antenna 270*...South America
Antenna 315*... Iceland/Greenland/US(Great Lakes)
This is a shortwave antenna farm at Rommele, Sweden. They have erected an amazing 7 separate EWE antennas pointed in 7 different directions on the globe. With these antennas you will be able to listen to a station and minimize interferences from other stations on the same frequency which are in other parts of the world. The antenna headings are marked in red on this great circle map.
Please respect other users on the radios. Always ask in the chat before you start tuning!
So, let's try to check if Your QRG is free by checking remotely from quiet location... i.e.
73, Petr OK1RP

The "Forbidden DX frequencies" table on 160m

4. března 2007 v 12:11 | Petr, OK1RP |  Operation topics
Hi all,
from my experiences with DXing on Topband I found that there are some frequencies which are not usable in some DX locations cause of local heavy QRM over there or permanent local BC interfered signals or other problems.
These frequencies are permanently unusable or even forbidden for DXing in that DX location and its not efficient to calling CQ or looking for DX from that location overe there...
In my oppinion it will be very usefull for all Topband enthusiasts to have the table of that "forbidden QRGs" available for quick check if needed. This table will be updated as many time as possible.
QRG (kHz)Forbidden range (kHz)DX-locationComments
18201819 - 1823JApermanent BC QRM in JA around 1820
18181815 - 1821ZLstrong QRM from local GPS correction on 1818
Informations about another "forbidden QRGs" in Your locations are welcommed for sure!
73, Petr OK1RP