LA0BY ODX

LA0BY, last updated 02.03.2019

This is a compilation of my personal longest distance records, listed separately for each band and mode. As it is not always easy to span large distances on VHF & up, the distance is a good measure for how unusual a DX contact has been.

 

My best distances on 144 MHz. all from JO59IX

Tropo

15.10.2011

20:45

EA1DDU

IN73EM

2138 km

CW

22.11.2018

18:22

UR8GZ

KN66RT

2086 km

CW

22.11.2018

22:43

UY5HF

KN66HP

2064 km

CW

Phantastic to work EA on Tropo, finally. I have monitored ducting, listened and called for about 10 years. There are 3 sea and three land areas over which inversions need to prevail simultaneously. For about one hour EA1DDU was the only station I could hear on the band!

MS

11.08.1996

21:00

LZ1KWT *

KN32FR

2198 km

SSB

12.08.2006

21:00

UA4NX

LO48SO

2186 km

FSK

17.11.1998

07:08

I8MPO

JN70FP

2166 km

SSB

The contact was made in random SSB at the beginning of my operation from JO59. The burst lasted for 2 minutes, which gave me enough time to connect the power amplifier to the car battery.

Sporadic-E

1.6.2010

18:32

UA6EC

LN14AE

2730 km

SSB

10.7.2000

16:45

SV3/DK7ZB

KM06UX

2675 km

SSB

1.6.2010

18:49

RA6HTT

LN04WX

2654 km

SSB

The other contacts listed in the "firsts" were made in the same opening

Aurora-E

16.08.1991

GM4IPK

IO99IW

1811 km

LA0BY/p

KQ41BC

(or Iono)

09.06.1989

SM2EKM

KP05UW

1947 km

DF9PY/p

JO30JF

The second contact is from my previous QTH in DL.

QRP MS

12.08.1999

RV3IB

KO87IS

1425 km

LA0BY/p

JP61DB

This contact was made on random SSB. RV3IB was using only 5 W and a 16 ele-yagi (!) ... 59 reports on both sides.

 

 

My best distances on 432 MHz, all from JO59IX

Tropo

22.11.2018

18:51

R6AM

LN04NX

2617 km

CW

22.11.2018

18:49

RZ6DD

LN04MX

2612 km

CW

22.11.2018

17:41

UA6AQN

KN96VC

2454 km

CW

Strangely enough, my tropo ODX on 70 cm is much longer than on 2 m. Troposhperic ducting is often more pronounced on 70 cm, but there are usually fewer stations on air. The event that made these long contacts to UA6 possible was a temperature inversion layer that spanned the whole path, thanks to the low altitude of the territories crossed. This is confirmed by topographic profile analysis performed after the contacts were made. The surface pressure map shows there wass a huge high pressure area over Lithuania, approximately at midpoint of the path.

 

 

My best distances on 1296 MHz, all from JO59IX

Tropo

18.10.2005

19:16

DF9IC

JN48IW

1235 km

CW

22.11.2018

19:59

EW6FS

KO35LB

1113 km

CW

01.08.1999

06:30

ON4PS/p

JO20KQ

1088 km

CW

On the 23 cm band I have never had a big setup, but always operated with a rather small antenna and only 15 W of output power. Also my focus in operation during good tropo conditions was usually on 2 m or 70 cm, as I have better equipment for these bands.