Oct 07 2018
432 MHz: 57 QSO’s, ODX 723km
1296 MHz: 18 QSO’s, ODX 467km
Noise is becoming a problem on 432 MHz to. I ran the contest without pre-amp on 23cm. This was very noticable. On Sunday I quickly build one and used this indoor. The Icom IC-9100 is somewhat deaf.
I expected more participants from the UK and Scandinavia.
Antenna on 70cm: 19el LFA. Antenna on 23cm: 120cm dish. Power: 432 MHz was 75 Watts, power on 23cm was 120 Watts.
Sep 08 2018
Peter (PA3PM) started to do some experiments with the ADALM SDR. This type of SDR is available for about $100 and capable of transmitting and receiving – even full-duplex – between 70 MHz and 6 GHz with a bandwidth up to 56 MHz. It’s capable to make DVB-S (and DVB-T) transmissions out of the box.
This week I’ve received my box. Within half an hour I was capable to produce an image on the PI6ATV repeater using the 1265 MHz DVB-S input and an old webcam. This is done with the native 0 dBm (1 milliWatt!) output of the SDR connected to my 120cm dish. I do have to note that there is a line of sight with the Gerbrandy tower more than 30 kilometers away.
Next is to amplify the signal using some RA18H1213G modules (18 Watt FM, 3 Watt DVB) on 23cm or some 3G modules still on stock for 13cm. And… more important, to filter the signals since the SDR will create harmonics.
B5 picture using 0 dBm over 30km+ distance
Technical specs:
Sep 04 2018
Good activity. Made 57+ QSO’s in 4 hours. Tropo was okay. Not good, not bad. In total 25 locators. Up to now, the first place so far from all dutch participants, which is also the first time for me. But PA1T hasn’t upload his log and I’m sure I’ll be second afterwards. 🙂
Sep 02 2018
B-MULTI. Operators: PA3FYM and PH4X. ODX 840KM ,135 QSO’s. Problems with overheating SSPA, so running lower power.
Aug 07 2018
Lot’s of noise due to upcoming thunder storms. Therefor I had the idea that less stations from the UK were QRV tonight.
Jul 23 2018
Today I’ve ordered a new SSPA amplifier. Now it’s for the 144 MHz band. I already bought a Gemini 180 Watt amp for 23cm in the past with the DXshop in the UK. After experiencing some issues with it, Roger (GW4WND) the owner of the shop, provided more than excellent service. And providing good service to customers pays off. The Gemini 2-500 is capable to deliver 500 Watts of power, so more than enough for the 400 Watt legal limit in the Netherlands. This new unit should line up perfectly with his brother on 23cm.
Jul 23 2018
Only 10 minutes in the shack before the doorbell rang and visitors arrived. No time to test-drive the new 120cm dish. Hope there will be some activity during the 1st weekend of August contest.
Jul 12 2018
Terrible propagation. In the beginning of the evening I wasn’t even able to work OZ1BEF. Later, when temperatures were cooling down we’ve made a QSO. SK7MW is missing in the log to to the lack of tropo. In total I’ve made 20 QSO’s in about 2 hours (20.00-22.00 local time) with a total of 5637 km. ODX is OZ1BEF (510km). Total points: 11137, good for a second place (1st place in the LP10 section).
Jul 08 2018
I’ve worked hard the day before the contest to get the 120cm dish for 23/13cm mounted on the roof. Special thanks to Frans PC2F for helping me out. During the contest, the 144 MHz station was Multi-Op since Remco PA3FYM was coming over. He hasn’t been QRV on VHF for a while. I think the last time was PA6NL in 2016. Since he was logging on paper, I was busy on Sunday afternoon…
Jul 04 2018
There were very good tropo openings towards LA and I was able to work multiple stations in JO59. Norway was a missing DXCC for me on 2-meters. I could even hear those stations on my FT-817 with rubber duck on the windowsill. Booming signals! After 2100 localtime I turned the antenna towards the UK. The desert of this contest was a QSO with GD0AMD/P from the Isle of Man. A complete new DXCC for me (didn’t work it on any band before). ODX today: LA2Z with 860 kilometers. In total I made 54 QSO’s. It could be a bit more but I had to stop before the end of the contest.
This maps shows tropo paths based on APRS data. Very good openings towards Norway (LA) and Denmark (OZ).
Jun 12 2018
First NAC on 432 MHz this year. The 2nd Thuesday of the month is always difficult for me. In the log: Netherlands, Sweden, Denmark, Germany and England. ODX was SK7MW with 617km.
