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...

Leden 2007

PJ4/KU8E on Topband in ARRL DX CW, 2007

31. ledna 2007 v 23:24 | Petr, OK1RP |  Band reports
Hi all,
John, K4BAI, and myself will be returning to Bonaire for the ARRL DX CW contest. John will be SOAB using PJ4A. I will be doing SO 160 Single Band using PJ4/KU8E. I will also do some operating during the day on some of the other bands giving out contacts. We will arrive on Feb 13th and I will be on 160 starting the night of the 14th. Hopefully the Condx will be good as last year when worked over 300 + stations from EU during the time we were there.
The location is very good on top of one of the highest hills on the island. I am also going to try to put some RCV antenna up to hear better. Currently there is a beverage about 350 ft long towards the USA. Any suggestions on what to do for a RCV antenna would be welcome. The ground is very poor consisting of rocks and scrubs. PJ2T has tried a RCV four square and K9AY loops from Curacao, which is very much the same ground as Bonaire with not much luck.

I would also like to make an effort to work JA this year. I talked to K8ND who operated PJ2T this past weekend and they worked a couple in CQ160 CW. My antenna will be an Inverted L with about 80 ft of it vertical and the rest sloping down.

73, Jeff KU8E
So, lets go to catch them from PJ4 on Top band if You will be able to hear their sigs. As Jeff do not speaking about the used power I hope that they will not play with QRP only to produce good sigs on Top band.
73, Petr OK1RP

(originaly published on Topband mailing list)


25. ledna 2007 v 14:13 | Petr, OK1RP |  Band reports
Hi all,
New Zealand Flag
as Brian, ZL1AZE confirmed me by an email they will be active in CQWW 160M contest from Quarz Hill as ZL6QH. Their set-up is quite good so many of us will have the chance to work ZL on Top band. From my last experience its not hard to work them cause of propagation nor equipment problems but mainly cause of lot of EU operators calling them without enough receiving capability. So please read following announcement and mainly his operating instructions.
Brian, ZL1AZE wrote:
ZL6QH will be active as a multi-op station in the CW CQWW 160M DX Contest on 27/28 January 2007. The operators will be ZL2BSJ and ZL1AZE.

Please note that ZL6QH has difficulty hearing signals in the range 1815 to 1821 kHz, due to strong QRM from a local GPS correction beacon on 1818 kHz.

Our run frequency at local sunset is likely to be in the range 1830 to 1835 kHz. Later in the evening we will attempt to find a frequency in the range 1810 to 1815 kHz or 1821 to 1825 kHz, when the band opens to JA.

Hopefully we will manage to work some West Europe stations via the long path near our sunset time, from around 0730z to 0800. We will also be looking to work Europeans via the short path in the period leading up to our sunrise at 1730z.

Your assistance with the following will be much appreciated:
1. Please do not call us unless you can also copy our signal.
2. Please only send your callsign once or twice, unless we request repeats.
3. Please refrain from transmitting over the top of existing QSOs with ZL6QH.

Thank you for your co-operation and we look forward to working many top-band stations in the contest.

GL and 73, Brian ZL1AZE
So, good luck and please be gentleman on the Top band...
73, Petr OK1RP

Noise Cancelling Solutions for Ham Radio 160m operation

17. ledna 2007 v 13:38 | Petr, OK1RP |  Technical topics
as I have lot of problems with high noise level in my suburban QTH I am looking for some noise cancelling methods nor product to enhancing the signals on 160m except receiving antennas...
Just few days ago I found interesting informations about the "bhi" products as follows:
Demo sound files.
This page contains sample sound file demonstrating the noise cancellation capabilities of the bhi products. These sound files have been recorded off air, and not electronically altered in anyway.
The following sound files demonstrate the reduction of interference.
Click on waveform icon to play sound file.
Interference demonstration
90M background Noise
90M Noise
Reduction of Noise on 160M band
75M short wave noise reduction
160M noise
75M Noise
Amateur Radio:
The following sound files demonstrate the noise cancelling abilities with amateur radio communications.

20M Band:
20M ssb conversation
20M CW demonstration
40M Band:
Conversation 1
Conversation 3
Conversation 2
80M Band:
Conversation 1
Conversation 2
Are You interested in the products which are able to make the signal enhancement like You hear in preview samples? Yes, I am so I found many of them there :
...pages of
Noise Cancelling Solutions for
Amateur Radio and SWL
This website is dedicated to providing information and help for amateur and SW radio operators
Full product specifications can be found on our main website, along with pricing and ordering information Click on the Go to Main bhi Web Site button on the left hand side of the page.
When I will have some experiences or field tests reports then I will put over here for sure.
73, Petr OK1RP

Transformers for Flag, Pennant, Delta, K9AY, EWE and others...

10. ledna 2007 v 10:57 | Petr, OK1RP |  Antennas
Hi folks,
as I found that lot of guys still has no clear idea how to make the transformers (the most important part) for receiving antennas like Flag, Pennant, Delta, K9AY, EWE etc. I decided to put some links to articles about that. - famous pages from Tom, W8JI where You can read more details about the terminated loops incl. the transformers construction details. - very complex informations about the rotable Flag receiving loop by Larry, W7IUV incl. pre-amplifiers etc. - very good pages about Flag construction by Mark, WA1ION. - summary information about the Flag and Pennants and some links to related pages.
More informations about detailed construction of rotable Delta terminated loop incl. the 1:18 (1:16) transformer, support, termination etc. will come soon over here.
73, Petr OK1RP