Monthly Archives: March 2014

A productive Saturday

Today I got a lot of stuff done at work. I have built a sound mixer box using two HA-400 headphone amplifiers. Pretty much works as a regular SO2R box but it’s made for two operators instead with two headphone outputs and possibility for each operator to select which sound levels they want from each radio and also if they want to listen to both radios or just one radio.

I also worked on the socket for the QBL amplifier that I got from SM3MXR, he also donated a tube in good condition. The mockup tube I am using was donated by SM3BDZ, it’s 90% OK so still good for legal limit power output. I first tried one idea which didn’t work so well, so I changed it and milled out another board which should work a lot better. The way I am doing it is inspired by SM2CEW and SM2EKM. It’s not really needed to have such screen decoupling on an HF amplifier but it was the easiest way to mount the socket, since I believe they are originally made in similar way.

Russian DX

We got a good margin on the Scandinavian record, an awesome weekend!

                 Russian DX Contest

Call: SJ2W
Operator(s): SE2T SM2IUF SM2LIY SM2WMV
Station: SJ2W

Class: M/S HP
QTH: Da Traesk
Operating Time (hrs): 24

 Band  CW Qs  Ph Qs  Countries  Oblasts
  160:   171     13      43        51
   80:   226     23      53        61
   40:   574    456      82        71
   20:   406    496      90        73
   15:   314    317      78        68
   10:   157    106      75        60
Total:  1848   1411     421       384  Total Score = 17,131,205

Club: Worldwide Young Contesters


We haven't done an effort in Russian DX for a few years but this time we decided
it was time to try to get the Scandinavian record now when we have some sunspots
and propagations were really good. We worked 2232 RUN QSOs, 657 S&P on the
Run band and 370 QSOs on the mult radio.

We also used the K3 for the first time on the "inband" position doing
S&P on the run band and we are very pleased with its performance. Now one of
the big summer projects is to get a tower up dedicated for that purpose so we
don't need to steal the antennas from the run radio when transmitting.

Cu in WPX SSB!

160m: 1/4 vert
80m: 4-SQ
40m: 3/3el + 2/2el + 4-SQ
20m: 6/6/6el + 5/5el + 4el @EU
15m: 6/6el + 5el
10m: 6/6el + 6el @46m
RX inband: 3-band vertical ~450m away + single verticals for 40 and 80

RUN: FT1000MKV + ACOM 2000A (Sponsored by Ojojoj Music AB)
INBAND (S&P on run band): K3
MULT: FT1000 MKV + ACOM 1000
N1MM Logger

Check the website for more information and continous updates of what goes on at
the station.

Time to get going again

I’ve been having it a bit slow lately. Haven’t really had much motivation to work on any projects which is something that usually happens to me during the dark winter month January and February. Even though I’ve still done some smaller stuff like some PCB design and programming its not my normal tempo. I have also been working quite a bit extra to get more money for the projects coming up. I have even received a couple of questions lately if I’m OK since there hasn’t been any updates lately. However now I’m feeling a lot more motivated again and this morning I woke up feeling like going to work and work on the QBL amplifier.

I did start with the RF-deck. I had said I wanted to fully complete the power supply before starting with the RF-deck but I am missing some parts and can’t really do much on it right now, so I decided to get going with the RF-deck. I started drilling all the sheets I had cut earlier and also made a shelf for the “floor separation” in the amplifier. I also tried to lay out some different combinations of how to position C1, C2 and the L + tube in the amplifier and finally decided that I will rebuild the roller inductor a bit and put them the normal way as in most amps. That way I can have some knob going out the front plate as well if wanting to tune them manually.

We will be working Russian DX next weekend as M/S and plans are also to work WPX SSB in the end of March with LB3HC coming back to us as guest op, also as M/S.