The (call)sign of things to come?

So, I decided to have a dabble on JT65 last night, had a listen to the bands and opted for 17m.

The frequency was quite busy but I found a spot where I could call some CQ’s. 7X3WPL came back to me, but as you can see he failed to give me a report. In fact, he ended the contact with a 73 and then started calling CQ.

So this station did not give me a signal report (look at the times), and he then went about calling CQ. I double checked back through the call/band history and could not see his call sign. Unless there was some serious QSB or some sporadic propagation openings he was not on that frequency calling cq prior to me.

So, this morning, I checked QRZ, and unsurprisingly there was a QSL waiting for my approval from 7X3WPL.

Now, as I am only a year or so on the air with this callsign, I would have liked to have had that QSO confirmed and add Algeria to my country’s worked, but no, I refuse to add something that has been so obviously made incomplete. Why bother even operating and trying to make contacts if you cant even be bothered to send a report ?  Obviously it could be, and probably is, an operating mistake but to then call CQ as well ? As it happens according to QRZ he gave me a -14 report.

Is this a sign of things to come, with more and more automation, and the 59 73 mentality ? I read about the up and runs where the last you hear from a station is R-02.

Please for the love of god, if you are operating a slow as hell mode (5-6 mins per qso) then at least send a report and see the qso through to completion. I am slowly getting fed up of wasting my time.

73

MB7UNE and balloons – KK6PNN-5

I noticed ‘in old data’ a balloon had passed over the UK on the 4th of March. KK6PNN-5 seems to have been around the earth at least once on its journey so far. Intriguing indeed !

I had received quite a number of APRS packets from the balloon through MB7UNE-10 but the one shown in the image below being the most distant.

A quick google search revealed it was released from the University of California, San Diego, on the morning of 12/02/17. A near-space balloon with an APRS pico payload on SBS balloon with H2.

Some more details…. click here !

73

3d printing – a dipole centre and a balun

So, after seeing some of the creations from a few friends, my brother and I decided to go 50/50 on a 3d printer.  I really needed a small dipole centre and balun combo, capable of 100w tops, so I decided to go about making one.

Some designs in TinkerCad, a few tweaks here, a few there, and the case was complete, together with a number of different plates enabling custom, so239 and bnc connections. The case would eventually house a 1:1 guanella current balun, using a fair-rite type 31 core.

screen-shot-2016-09-08-at-12-13-59

The case went through a number of iterations, and prints. The above design was the finalised version (hopefully, lol).  The T clip you see in the design enables the dipole centre to be attached to a painters pole or slid down a fibre mast.

I am only printing in PLA at the moment, so the balun will not stand up to 365 days a year outdoor use.

img_4264

Anyway, the printer is nearly finished cooking another, so i’ll sign off here.

73

Richie.

 

A distance on 2m

Well, I was having a tidy up in the office, and found a scrap of paper with two log entries on that I had forgotten about.  The contacts were made on the 4th June’16 during the CW National Field Day and the 6m field day, on top of GW/SW-020 (Edumund’s Tump).

I was using 100w SSB on 2m, and made contact with PN4CPN/p around 16:50utc, some 338 miles into JN29dx, with a 5/9 report both ways. Also ON6CK/p some 277 miles into JO10ps a few hours earlier, around 14:48utc, also with a 5/9 report both ways.

Interesting conditions. So much else going on that day I didn’t really have time to work any more.  I was using my original 4 ele 2m home brew beam, but this has now been reworked into a 7 ele. I will have to give it another go soon 🙂

Cheers for the contacts !  73

2m distance

BBC Micro Revival – Model B 32k

owlWell, over the years I have had loads of computers, some home brew, some commercial. They have come and gone, however, my Acorn BBC Micro – Model B 32k has always followed me around.  It was purchased second hand some 30+ years ago, after selling our beloved Acorn Electron. I can remember my mum taking me into a computer shop in Newport to look at a Sinclair Spectrum 128k with cash in hand, and telling her it would be ok to park on those lines as we were only going to be a minute. How wrong I was – parking ticket and clip around the ear later 🙂  My brother and I decided to go for a BBC Model B instead, and due to the price, second hand was the way forward. One was found, from a family in Bassaleg I seem to remember. Anyway, enough of the back story….

Or perhaps not….  For a good many years of my childhood, my brother and I used that BBC Micro, together with a friend Chris McCray we spent many a weekend, tweaking that, bodging this, downloading via prestel/teletext, listening to Music 500’s and other shenanigans. Fast forward 31 years, and my BBC Micro – Model B was in a sorry state, and would not switch on.

bbc1

After some diagnostics, I discovered the PSU was not working, a bunch of capacitors need changing, specifically C1, C2 and C9 in the PSU.

  • C1 (0.1uF (100nF) X2 class capacitor) @ 250VAC (or higher)
  • C2 (0.01uF (10nF) X2 class capacitor) @ 250VAC (or higher)
  • C9 (220uF electrolitic capacitor) @ 10V

b2

For simplicity, I picked up a kit from sprow.co.uk, just to get the PSU working again, and after 30 mins or so, the familiar double tone was heard. I will eventually change all the electrolytic caps in the PSU for peace of mind.

Everything had the looks of a 10-12 year olds bodge stamped all over it. Wires tacked in here, solder blobs there, a complete nightmare inside.

satate3 state state2

So, I pulled out everything, all the junk wires, the dodgy keyboard cable (which came from an old case that used to house the computer and had a remote keyboard), the 10k pot on cables for volume, chock blocks, it all got cleared away.

I replaced all the power cables, however some of the spades had snapped from the mother board, so I replaced those with dil header pins. The CAPS lock key on the keyboard seemed to be faulty, and after investigation the pad had been pushed off from the board. A small jumper to a piece of track fixed this.

tidy1

tidy2

The composite video out connector needed fixing, the wires had been ‘ripped’ out of the motherboard.  Things were getting better and taking shape. I gave the board a general clean up with some isopropanol and a q-tip.

After some testing I noticed that the audio seemed rather quiet and would often crackle and become inaudible. I replaced the 10k pot with a 3296 variable resistor, not the ideal solution (needs a stupid number of turns, but hey ho).  I decided to replace all the electrolytic caps on the mobo, so this was the next job, relatively easy.  Audio still unstable, I decided to replace the LM386N audio amplifier 8 pin chip and swapped out with a modern replacement, which was not the best thing to do. The old chips were 1W, this new one 0.25W, so even quieter.  I have noticed that the audio crackling has been reduced but not completely removed. Next plan is to swap this LN386N with a NJM386BD which is a 1w equivalent. I am also planning on swapping the quad op amp LM324, the chip before the LN386N.

I also picked up an MMC userport solid state disk drive, to act as a data store for the beeb, having lost the 40/80 track 5 1/4 inch drive over the years unfortunately.

Upcoming plans are to replace the remainder of the PSU caps, fix some ceramic disc caps that have been chipped by extracting roms, connect it to a vga monitor via a gfx interface board from the ttl rgb output, get the old music 500 working and a number of other simple jobs.  Chuckie egg, revs, elite and a bunch of other games were tested, and ran perfectly. Oh, I did enable colour on the composite out just to test things before the gfx board turns up.  This final picture shows her with her lid back on. Happy days 🙂

final1

Another 2m CADARS Net – Magor Wetlands

So, with the disaster that Sunday turned out to be, with all the access roads to local mountains blocked by the cycle event down here in Newport and surrounding areas, I decided to head out last night (Monday) to the local wet lands here in Magor. I was sending out APRS positional info on 144.800 and pulled the following two maps from APRS.FI, a great website for aprs info.

Magor Wet Lands

I parked up between a number of reens, what a fantastic spot for the evening.

Magor Wetlands Parked Up

As I was driving down the track, I saw a swan floating around. Lovely looking creatures and I counted at least 6 of them down there.

Initially I had the SG7900 antenna from Diamond attached to the mount on the landy, but signals were quite down. The height according to the GPS is roughly 6m ASL here, so very low lying. Dave GW7RQM was the first on frequency, just after 7:30pm, followed by Chris 2W0OGY. I decided to stick up the painters poll mast (about 5m) with the antenna on top.  Signals improved vastly, at least 4 s-points of improvement, with the same antenna, in the same X-Y space, but at greater altitude and a different feeder (note to self : must test feeder loss on the roof rack mount).

Stations in order of appearance :

GW7RQM – Dave – 59
2W0OGY – Chris – 56
MW6UNY – Lee – 59
GW0OZB – Andrew – 59
MW0RPB – Pete – 59
2W0EID – Russ – 53 mid (51 low)

We had a good natter to around 8:30pm and everyone headed off.  I put a few calls out on 145.500 but no takers, perhaps the 2m signals not getting out too well from there.  The sun started to set so it was time to take a couple of pictures and videos.

Magor Wet Lands Sun Set

What a lovely sunset to round off the evening down there. Thanks to all the stations that called in.

73

CADARS Spring Fox Hunt 2016

So, it was the day of the event, all the equipment checked out. The Yaesu FT1XD handy fully charged, and the 3 ele 2m tape measure beam was in good shape. We all gathered in the carpark off Victoria Street in Cwmbran. My brother Julian joined me and he was the designated driver.

Fox_hunt_2016

Dave RQM had a great setup on his car, his 2m and 70cm beam attached to the bike rack mount. Next time I think he needs a small rotator on there as well, so he can do it all from the comfort of the driving position 🙂 With his compass around his neck he was definitely on the way to glory, or was he?

dave_yagi IMG_3705

Chris OGY and Mark MKG drove off and started sending out the beacon around 13:55. To be honest the signal received in the carpark was fairly wide, in that the beam could be turned a fair bit and the signal still received even with lots off attenuation. Thinking back on it, this should have caused alarm bells to ring, but at this stage I was oblivious.  So I started releasing the teams/cars around 14:00 at 5 min or so intervals. There was one car that had a distinct advantage, more on that later. We were the last to leave.

The following map show all our fixes :

fixes

Point 1 – Starting position, this was a fairly good fix, although it was quite wide at this point. So we decided to head to some high ground to try and get another.
Point 2 – We got another good’ish fix here, although houses were probably having some effect. We decided to head up to even higher ground.
Point 3 – We passed Ken and Pete here, I guess before their exhaust fell off (excuses excuses) and headed all the way up to mountain air car park. 10 mins in this lane due to a tractor coming down the hill will lots of cars. We got a very good fix here for obvious reasons, and if we had looked hard enough could have probably seen the fox at position X.
Point 4 – this was a double check, as we didn’t really want to go too far
Point 5 – another double check, but we decided to go to point 6 here, as we thought the fox might be playing golf !!
Point 6 – a good fix here, frustration starting to set in. We were in the golf club and having to toot our horn as we drove over the fairways….. rofl
Point 7 – this was another double check fix really, honest guv !
Point 8 – Now this is were things went BAD BAD BAD. Look how we got totally confused here. The fox was actually directly behind us, but we were in the shadow of its signal, behind a small rise. The signal was now bouncing off the old Rechem chimney and buildings. OH NO !!!!!
Point 9 – Another reflection from the chimney !!  In the pub car park no less.
Point 10 – …. and another… damn that chimney !!
Point 11 – Ok this was it, heading back on ourselves. We got lost in this housing estate for a while, a maze !!!
Point X – Ah ha, we found it, after a bit of coaxing from the fox, we made it, some 1hr 12mins or so after set off….. argghhhhhh

So we finally got there, in second place. John OAJ and Lee UNY were the first there, aided no doubt by Lee’s heavy right foot and the open top where John could run the yagi whilst driving. That’s my excuse anyway…. haha. John and Lee below can be seen in the DF winning vehicle. Good stuff chaps 🙂  At least you two will be setting up the fox next time, so everyone else can stand a chance… haha. Although saying that, John will probably run 0.1 watts, attached to a farmers fence 🙂

foxhunt_2016_victors

You can see me here, running in joy from the Defender, finally !!!!!!  What a reflection nightmare it turned out to be.

finally

The final times for the remainder of the guys were quite close, Rich Hicks drove in next, but due to release time he was actually fourth.

WP_20160417_15_41_52_Pro

And everyone else came in together. Ken/Pete, followed by Gareth/Rhys and then Dave/Evan.

WP_20160417_15_44_48_Pro

The area that Chris and Mark had found was a nice spot indeed, the reflections from the buildings and chimney showing how difficult DF’ing can be.

f1

Chris looking at his watch thinking blimey, what is taking them so long…..

chris_time

John recovering from his win… well done you two !

toomuchlikehardwork

 

Thanks to all that attended and made it a fun afternoon. Most of us headed off to the local pub to laugh off our exploits and to try and work out where we had gone wrong.

The final results were in….

results

There will be a presentation at this weeks club night to the victors.

73 all, and thanks to my bro for putting up with my impatience 🙂