CQ WPX SSB

New record, yay!

                    CQWW WPX Contest, SSB

Call: SJ2W
Operator(s): SM2WMV
Station: SJ2W

Class: SOSB20 HP
QTH: Da Traesk
Operating Time (hrs): 34

Summary:
 Band  QSOs
------------
  160:     
   80:     
   40:     
   20: 3059
   15:     
   10:     
------------
Total: 3059  Prefixes = 1147  Total Score = 7,202,013

Club: Worldwide Young Contesters

Comments:

Aweful propagations at the beginning of the contest. The first 40 minutes were
decent, but then it was downhill. I decided there was no idea to continue and
took offtime. When I woke up after a couple of hours the band was still dead,
so I slept a bit more and when I woke up again 20m was still quite bad, so I
wasted most of my off-time during the first day, which I guess was a good
choice. However it ended up being the way that I lost about 2 hours of the 36h
op-time, however I doubt it would have generated many QSOs.

The score is a claimed new Scandinavian record, but I don't know if I have been
accurate enough for it to pass log check. I tried my best, but there were so
extremely many QSOs that were pulled out of the noise because of the quite
varying propagations. Sunday was decent and it looked good but some small
aurora on Sunday evening made the rate drop. However it picked up great by the
end so I could speed above the current record. I am very happy about the result
considering how the propagations were.

It was really fun to follow the progress of the SH3Y team, a bunch of young
kids from all over Europe who went to SK3W and operated the contest in the M/M
category, shattering the current Swedish record. Congrats!

6/6/6el + 5el + 4el @EU
FT1000 MKV + ACOM 2000A (Sponsored by Ojojoj Music AB)

G1 and G2 boards

I got a few boards today that SA5BJM wanted me to design and since I needed them for my own project I did. The G1 board is based on a DC9DZ design which I modified some values to suit the QBL amplifier. I haven’t tested it, I am missing a 230->110v transformer that currently is at SM3WMU QTH since he transported it from SA5BJM when he was south last weekend.

I also tried the anode choke. First I had 4 sections (no real need to wind sections for this since I have a ferrite, but I did anyway) and got 800uH indutance so I changed to 3 sections and got about 550uH. I did some quick measurement and seems like I have no resonances below 30 MHz which was the goal.

Tomorrow I am heading down to SJ2W and I will be QRV SOSB 20m this weekend.

QBL amplifier

Today I got more work done on the chassis for the QBL amplifier. I had forgotten my phone at home yesterday so I could not take any pictures, but I did take some today instead. I got the HV rectifier assembled, made an anode choke out of teflon and 61-material ferrite rod. The idea is to get a lot of inductance without needing to get any resonances under 30 MHz.

I also got the L-iron welded together and now it’s ready for the aluminum side plates.

QBL chassis

I have been working on building the chassis for the QBL amplifier. I tried to find some 19″ rack unit but unfortunately I could not get hold of anyone big enough, so I decided to build one myself out of 20x20x3mm L-iron. After cutting them with my new RAGE 2 saw I used a drill press to thread 120 pcs of holes for the aluminum sides, which I will need to cut later. I need to borrow some equipment to cut those so that they look good.

I built the box quite large, but I rather have it too big than too small.

I have also milled a few boards that will be used for the amplifier project, one is a rectifier board and the other is a couple of zener diode boards.

Power saws are perhaps the most power tools with rotating blade and useful machine in any metalworking and woodworking shop. If you are a DIY enthusiast, you know how often we need to cut a pipe or a piece of metal or wood. When you have to do a lot of cutting, using a hand tool such as hacksaw will get you exhausted pretty soon. Power saws are great since they not only reduce out workload but also enable us to cut things more accurately.