Friday, September 26, 2014

QSL Cards



In my last post I mentioned being an associate member of the RSGB when I was 15 years old and I had my own receiving station number - A6412.
Well, tonight I sifted through my hundreds of old QSL cards to find my one and only A6412 QSL card!

I spent an hour looking at some of my old cards which I keep in a special box that I have collected since 1969. Some I received for sending a report as an SWL, while others are my pride and joy confirmed contacts on VHF and UHF for DX. Looking back, I am just amazed at some of the QSL cards and the effort that operators put in including personal greetings and messages from all over the world.

I guess nowadays we rely on e-QSLs I have not received a written QSL card for years...such a pity! I loved to collect QSLs and sometimes went knocking on doors of amateurs when I was young to ask for a card for my collection.

Thursday, September 25, 2014

Radcom Archives



I first joined the RSGB 45 years ago when I was 15 years old in 1969 as an associate member - A6412
Every month I received a copy of 'Radio Communication' the RSGB's magazine, often waiting for the postman to arrive. I kept every copy up until about 1990 when I lost interest in the hobby and concentrated on my new teaching career. I kept all the magazines in the attic, but in a moment of madness I decided to throw them away, thinking that I would never use them again. I remember taking them all to the recycling centre and putting them one by one into the metal skip.

Years later, when I renewed my interest in amateur radio and re-joined the RSGB, I regretted throwing those magazines away. Many of the projects that I built were in those magazines and now as I think back to those constructing days I feel at a loss.

A couple of weeks ago I bought myself a CD Rom version of the first years of my RadCom magazines from the RSGB bookstore and am now enjoying browsing through five years (1970 -75) of mags. Brings back lots of memories looking at the circuits, articles and advertisements. I remember 'sending off' orders to places like Bambers, Birkitts, Garex and Amateur Radio Bulk Buying Group. Posting the orders and waiting sometimes weeks for the goods to return! How things have changed.

I may buy the next five years of RadCom, only problem is that each CD costs around £27 and I feel a bit niffed that I have to pay all over again for the magazines. The CD's are also as old as some of the magazines in them quoting Windows 95 and Windows 2000 to run. Includes a heavily outdated copy of  Adobe reader. I wonder if the RSGB would consider offering these CD archives at a discount (or free) to amateurs like myself and others who once had a complete set of magazines, but were foolish enough to throw them away!

I sent the above text as a letter to the RSGB and received a reply:

Steve

Thanks for getting in touch and expressing your views. I am responsible for the RSGB CDs and so thought I would get back to you to outline our current plans here. Essentially as of the 1st Oct (tomorrow) we are planning to open the 10 year archive of RadCom articles. This is an online resource for members (only) that will allow you to search RadCom articles from the last 10 years in a variety of ways. This builds on the work of recent years where we have been holding a rolling year of complete RadCom magazines on our website. We will continue to offer the CDs as a more convenient way to keep the archives. As you have already surmised these are not being updated and once the existing stock is exhausted there is no plan to continue them although we may do the annual CDs for a while yet. In time we may eventually reach the point of having the entire RadCom archive available online but that is a major task with a large number of difficulties. However it is the plan to offer it all in time – free to members.

Hopefully that clarifies the situation for you and again thanks for taking the time to write to us.

Best Regards
Mark Allgar, M1MPA
Commercial & Membership Manager
Radio Society of Great Britain

 
A section from 1975 Radio Communication showing the Club News. At the time I was secretary of the Bolton and District Amateur Radio Society (B&DARS)

Wednesday, September 24, 2014

Matchmoor Lane


This has always been my haven for peace and tranquility!




When I used to be a field service engineer I would often go up Winter Hill to the top of Matchmoor Lane and enjoy time to finish my paperwork and listen on 144Mhz with my mobile set up. We often came here for contests and VHF NFD back in the 70's and 80's with the Bolton and District Amateur Radio Society.



Now that I am partially retired it is nice to take my handheld and listen around on 144Mhz and 432Mhz FM and just enjoy the tranquility and view from here.



The view from here is stunning on a sunny day in Autumn!

Saturday, September 20, 2014

1296Mhz transverter revived


Many years ago I built a 1296Mhz transverter using the DF8QK design from VHF/UHF Communications magazine. It took me quite a while to build and setting up and aligning was very tricky. After lots of patience, I managed to get the main part of the transverter working with an output of only about 100mw. Later, I built a three stage receive pre-amp with three BFR34 transistors and also added a single transistor BFQ34 power amplifier to increase the output to around 1watt.
The whole of the transverter was enclosed in fibre glass copper clad boards and as they were all built in separate modules, I assembled them all together, with the pre-amp and P.A. mounted separately inside a box.



I built a 10 over 10 slot fed yagi as per Radio Communication handbook (P13.25) using plumbing pipe and brass rods. This together with the transverter worked well. Unfortunately, back in the early 1980's there was little activity on 1296Mhz, so I hardly heard anything! When I took my shack apart and kind of 'gave up' amateur radio the transverter has stayed in the attic. The antenna gradually fell apart.

Since I have returned to amateur radio again I have taken part in the Tuesday evening activity contests. In fact, I have operated on all the contest bands, except 1296Mhz and above. I felt a bit left out with 23cms, surely there must be activity on these nights?  Several times I have brought down my old transverter and connected it to my Yaesu FT101E, but heard nothing and have not even been sure whether the transverter even works any more. It got to the stage where I was about to throw it out because it I really couldn't be bothered trying to fix and align it all again after all the problems that I had initially.



Then earlier this year I got a SDR receiver which works happily on 1296Mhz. So on the contest nights I tried it out to see if I could hear anything on 1296Mhz. I was quite amazed to find that I could hear several stations with just my 70cm antenna connected!
On Tuesday this week I decided to try just once more to see if I could hear anything on my old transverter. I put in all the plugs and checked all the connections then switched on - nothing! I stood staring at the little beast scatching my head. Then suddenly I had a thought...I wonder if the oscillator crystal is working? I flicked the crystal a few times then with my fingers turned the core of the coil a turn.

OMG! It burst into life! I tuned and heard several stations in the contest...I was amazed! I listened for a while and wondered if the transmit part works. I found a strong station and called him...I works!!
The station I called was G4NTY/P and he came back with a 5-3 report although he was 5-9 with me.
I was so pleased that after all these years the transverter still works! I carried on working some more stations with the transverter connected to the 70cm antenna (No antenna for 1296Mhz)

My log now shows:

G4NTY/P, G8XUJ/P, G4HGI, G3TDH, G4CFP. 

Not bad for a home made transverter built back in 1980!

Now I need an antenna...do I build another 10 over 10 or should I splash out and buy myself a 1296Mhz Tonna?  Watch this space!

Monday, August 25, 2014

R109 Receiver



The other night I watched a programme on TV about the taking of the Arnhem Bridge during the war. It was interesting to watch and also why the mission became a bridge too far. It seems that one of the problems was the radio equipment which failed to function correctly. That meant that there was a breakdown in communication between the different troops. In the film showed one of the radio operators at Arnhem using an R109 receiver. I took some photos from my screen.



I was amazed to see this because I had one for years when I first got my Radio Amateur licence. It cost me £1.50p from a surplus shop on Folds Road in Bolton. It worked perfectly and ran from two 6 volt motorcycle batteries that I had permanently charging. The R109 had a vibrator pack to increase the voltage and also had a spare set of valves held inside the case of the receiver. The first thing that I did was to the metal guard on the front, it must have been hard for the radio operator to use this receiver with the guard fitted. I also removed some of the other things like the antenna terminals and big knob on the left that didn't seem to do anything. I fitted a coax socket for the antenna. 



Here I am operating the receiver when I was 17 years old, note the two 6v batteries under the bench and old WWII headphones.

As I watched the programme I could remember what all the switches and knobs did on the R109, it was a fine receiver and I modified it inside to make it better. I added a BFO so that I could listen to SSB signals and also an S-Meter connected to the AGC line, it worked well! You can see the BFO adjustment knob just above the microphone.
I would love to play around with some of these old receivers again!

I'm not sure what the transmitter is on the right of the R109, I don't recognise it at all.

Wednesday, August 13, 2014

Sporadic E on 70Mhz



For the first time ever I managed to work a DX station outside of the UK on 70Mhz!
I have always liked to use 4m, back in the 70's I operated the 70Mhz contest station during VHF NFDs. A great band, but not much activity. On Sunday I listened to 4m out of curiosity because there was a contest sometime during the day. When I switched on my FT101E and home built transverter I heard a couple of local stations calling CQ. Then I tuned down a little and nearly fell off my chair when I heard CT1HZE in Portugal calling CQ!

This was obviously Sporadic E and his signal was fading in and out from S3 up to S7. I gave him several calls, but to no avail. After tuning up and down the band there he was again S9+ this time. I called again and he heard me! Amazing...we exchanged reports he got me at 5-7 and he is located at IM57NH.


My home built transverter from the 1980's still works perfectly...running about 4w into a 70Mhz HB9CV...I was so pleased with the contact!

Shortly after I went onto 50Mhz and worked another station with Sporadic E from Spain EA1AR in IN17PP.

Friday, August 08, 2014

Disco Native


The other night I set up my old disco equipment that I have had now for over 20 years! Until now, the equipment was stored in a cupboard at school gathering dust. It consists of a 100 watt MOSFET Amplifier that I built from a kit supplied my Maplin. It is mounted in the original aluminium case that I built back in 1970 that housed my stereo 'PW Partygram' amplifier.




The speakers also came from Maplin and the boxes I built myself from a design for the speakers that I used. The quality of these speakers are superb, even now after over 20 years of use.
The mixer was again supplied by Maplin and I built it into a case with jack sockets on the back for easy connection.




When my disco was in it's haydays the mixer was housed along with two Gerrard SP25 belt driven decks. Later, when CD's came along I stopped using the decks and just used two CD players.
Gosh...it seems so strange after all these years to think that I was once a DJ! I remember doing discos in all kinds of places. It started at school before I became a teacher, but then did discos for all kinds of events. I think the biggest was at the Pack Horse in Bolton with a huge number of people on a charity event. I also used it as a sound system for school plays.
Now I have a JVC LA-100 deck connected so that I can listen to my vinyl LPs and singles! The equipment works perfectly and the quality is brilliant....now that i'm a bit older, I don't whack up the volume like I used to!





Next job is to give the disco another coat of mattblack paint!