Amateur radio is my hobby...

SP5OBN

QRV: evenings, 80m / 40m

SSB

FT8

— UTC

QTH: Piaseczno · Locator KO02mc · on the air since 2007

Private amateur radio station website — equipment, antennas, ESSB audio, QSO logging, DXing, and reports on field activities (SOTA/POTA, contests, expeditions).

eQSL? Yes

Do you accept QSLs from eQSL.cc?

LoTW Yes

Do you use ARRL's Logbook of the World (LoTW)?

Mail QSL? Not Specified

Do you send QSL cards by postal mail?

01 · STATION

About me and my station

3.720.00 MHz

LSB · Power 500W · SWR 1.1

Flex Radio Aurora AU-520

I obtained my license in 2007 and have been actively on the shortwave bands ever since, mainly SSB, CW, and currently digital modes. I most enjoy chasing rare DX and field activations. I am constantly improving my antenna farm on a very limited plot of land.

Transceiver	Flex Radio Aurora AU-520, Icom IC-705, AnyTone AT-D578UV II PLUS
Amplifier	500W AU-520, 100W Xiegu XPA125B
Power supply	RigExpert Shackmaster Power 600 Built into AU-520
Antennas	Diamond W-735, EndFed Multiband 80m/40m, Dipole 20m, Plans: Hexbeam 20-17-15-12-10-6m
License class	A
Licensed by	in 2007
Club / Branch PZK	N/A

02 · ESSB

ESSB - Enhanced SSB Audio

Material in preparation

It will touch upon a highly controversial topic, which is TX audio, not only in terms of ESSB, but also within the frequency range from 100Hz to 2.9kHz. Why some radio amateurs, despite having very good transmitting equipment, are hard to understand when transmitting.

03 · Antennas

Antenna Structures

Diamond W-735

Dipole link, length 26 m - a compromise antenna for low HF bands.

80 / 40 m

EndFed 200W (Shortened)

End-fed antenna powered by a wideband transformer (49:1 unun) - a good compromise for a limited plot. It works very well!

80 / 40 / 20 / 15 / 10 meters

Symmetrical half-wave dipole

A classic horizontal dipole stretched between two masts – best parameters for a single band.

20 meters

UNDER CONSTRUCTION

Hexbeam

Planned directional, multi-element antenna — under construction.

20 / 17 / 15 / 12 / 10 / 6 m

04 · QSO Logbook

Last Connections

Log QSO - Live from QRZ.com Full profile →

05 · DX | Competitions

Career advancements

DXCC

64 / 340

IOTA

18 / 1246

State Of The Art

25 activations

POTA

22 parks

Azimuthal map from QTH

Illustrative chart of directions and distances to major DX regions, calculated from the KO02 grid locator. Useful for directional rotating antennas.

Upcoming events

SIE

SP DX Contest

Planned start in the SO Mixed HP category

WRZ

IARU HF Championship

Weekend start, mainly 20 and 15 m

October

CQ World Wide DX SSB

Full 48h, joint start with the SP5PZK club

View full competition calendar →

06 · QSL

Confirming connectivity

✓
LoTW
Cards are usually uploaded within a week of connectivity.
✓
eQSL
Account confirmed (AG).
✓
Direct
Upon request, reimbursement.

07 · News

From the antenna to the blog