Saturday, 13 April 2019

6m propagation to OH

Today there were good propagation conditions in the direction of Finland, OH.



I made a good QSO with OH5ELO on 50.313 MHz (FT8 mode). Used 10 Watts RF from my FT450 transceiver.

Friday, 15 March 2019

Maasvlakte2

Recently I found some pre-historic material on the Maasvlakte2 beach. This area has been created from  Northsea sand. This sand contains lots of (pre) historic material.
Sea-level 100.000 years ago was 50 - 100 meter below current sealevel; there was no Northsea. The Netherlands and Brittain were connected.


Beach, Maasvlakte2


Piece of mamal bone. Estimated age: 65.000 years (Early Weichselin)

Fossilized oyster (Ostrea Edulis). Estimated age: 15.000 years (Holocene)

You can check your collected material here: https://www.oervondstchecker.nl/alle-vondsten

Nothing to do with radio, but not only radios are fascinating.

Wednesday, 20 February 2019

First geostationary amateur satellite succesful

Es'hail-2


Web SDR:


More info:



Es’hail-2 was launched in 2018. This geostationary satellite (fixed at a distance of appr. 36.000 km from earth) carries two “Phase 4” radio transponders operating on radio amateur frequencies (2400 MHz uplink, 10450 MHz downlink). A linear transponder has a bandwidth of 250 kHz and is intended for conventional analogue radio communications. Another transponder has a 8 MHz bandwidth and is designed for experimental (DVB) amateur television.


First ham QSO’s have been realized.

E.g., G0MGX was able to receive the satellite’s signals with an (ordinary) satellite dish:








Wednesday, 6 February 2019

Sunday, 13 January 2019

Balun for long wire antenna

I would like to do some experiments with an end-fed long wire antenna (appr. 20 m. length). One needs a balun for impedance matching. For a longwire antenne a 1:9 balun is recommended.
I found a nice design on the website of PA3I: 
https://pa3i.jouwweb.nl/antenne



I have collected the components:



The ferrite core has Amidon partnumber FT157-2.
More info: http://www.amidoncorp.com/t157-2/

The box is IP55 water resistant.

Assembled it looks like this:



With 20 meter longwire attached to the balun, following first results on various frequencies (all FT-8 signals) popped up;



Monday, 31 December 2018

20 m SSTV

Good SSTV signals the last day of the year in Zuidzijde on 14.230 MHz !



Off topic:


Maasvlakte2

Sunday, 30 December 2018

FT-8 40m

Impression of 40 m FT-8 stations that received my 40 m. signals today.
I used the FT-450 Yaesu trscvr on 5 Watts RF.



Sunday, 23 December 2018

FT-8 experiment on 6m

This morning I made an FT8 QSO with Belgium on 6 m.
I found Noel, ON4APU, on 50.313 MHz:




Off-topic: Funghi from my garden



Saturday, 17 November 2018

50 MHz WSPR

Today I received WSPR signals from Belgium on 6 m WSPR:



Off-topic:


Sunny autumn afternoon in Soest, 18 Nov 2018



Friday, 26 October 2018

PI4HAL

eQSL from PI4HAL was received today:




Off-topic:

Mauritshuis Willemstad December 2018