Sunday, June 30, 2024

My quest to learn CW (7)




Not much to tell about progress. Yes, I did make a first CW QSO with the begali paddle. Under pressure that was because of a failing computer. TF/AE5X was the lucky one, he even captured it on video. I imagine something else from my first QSO, but hey, it is what it is.


Still struggling at 28wpm/10wpm effective. I managed to get to lesson 40, my goal and the end is to run it 100% at this speed and then continue to 28/11wpm. 

I'm not doing lessons only., I also do a lot of plain text training and started to do word training on daily basis. I started at 2 letter words and after I managed to do that for 100% I continued to 3 letter words. For now the best I can do is 99% with 3 letter words starting at 20wpm and ending at 40wpm.

Some people tell me to listen on the bands. I do, but unfortunately I can't make anything out of it. Most CW transmissions are way too fast. A few letters is all I can do.

I realize I'm not a fast CW learner, may be I'm too old? Or may be it has something to do with my disability to learn music from notes. I've tried that in the past but I'm not able to read notes and then play music out of it. Even after a few years all I saw was separate notes. I really hope that this has nothing to do compared to learning morse. When I read that some people hear the music of notes, well I can't hear it. I only hear long and short beeps, no tones. Not shure what they hear or what they mean?

Update 7-July-2024:

Finally managed 100% at 28/10 wpm effective. Sometimes I think that 28wpm might be too fast. On the other hand I need not to count but hear how the letters sound.




Thursday, June 27, 2024

Rebuild of the EA642ZB7 (Part 3)

The EA642ZB7, at the background my tower...

  I finished the EA642ZB7 for now. Not completely satisfied about the construction. But it is certainly a lot better compared to the build originally. This is a very small 3 band antenna. Ideal for someone that hasn't much room around the house. I think the 50MHz and 70MHz part will be working great. 145MHz will be less efficient compared to a monoband beam. But hey, when you haven't got the space it is good enough. You will not notice that 1 or 2dB less.

When I look at the picture at the right I realize now that it looks like I have a gigantic beam halfway my tower when you look at it from a distance. Imagine....


Originally I think the 50mm mast clamp is mounted right at the boom. I didn't like the idea of just one mast clamp, the manufacturer did of course because it is cost effective. I did make my own with 2x 50mm mast clamps. By the way, I've only used scrap aluminium from old antenna projects in this "upgrade". I'm not intending to keep this antenna for my own but sell it to someone that is really interested in it.




I mentioned the balun earlier. Personally I would use better coax on it. But since the PL chassis seems to be glued into the alu tube I can't replace it. The coax used is RG58 and there are 11 windings on the tube which has a diameter of about 20mm. And yes, it is mounted with ty-raps, that's the way also described in the manual.




SWR/resonance is good on all bands. Initially SWR on 70MHz was best at almost 72MHz. Bending the 70MHz open sleeve "dipole" ends towards the 50MHz dipole corrected this a lot. SWR on 145 is at best 1,5:1. Could get better when the antenna is mounted free and at height.

Some pics:





2m resonance point?



I now learned that originally this antenna was designed with EZNEC by DK7ZB. Nice thing is that his page featured a picture of a homemade one from my neighbour station PA0O.


This antenna is for sale. If you are interested please write me an e-mail. You'll find the e-mail address via QRZ.com. I'm not shipping it outside the Netherlands, it would be too expensive.

Update 7-July-2024: Antenna has been sold to PA3FFD Dirk. Hope it does a good job at his QTH.

Wednesday, June 26, 2024

RHR Skimmer opened for everyone

Remote Ham Radio in the USA has opened their FT8/FT4 skimmer for all 31 locations to the public for free.


This is interesting especially if you want to work the USA/Canada on any band including 6m. Their locations are excellent and on the best sites in the US. RHR uses big antennas, if there is propagation they will hear/see you. Besides that they have locations in Haiti, Croatia and Puerto Rico. 

https://skimmer.remotehamradio.com/