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R1155

Phones- Digital, Analogue, PABX, Receivers, transmitters & military equipment.
 
Posts: 201
Joined: Wed Mar 05, 2014 7:52 pm
Location: Lancashire

R1155

Post by Sparks » Mon Mar 10, 2014 8:16 am

I came across this a few years ago on a car boot sale and picked it up for £15. Over the next few months, I cleaned it up physically, built an external power unit and fitted a 6V6 output stage in one of the DF valve sockets. The old DF valve holder was just folded back inside and insulated, so that in the future, if anyone wanted to convert it back to its original form, it would be easy enough. The Jones plugs are still underneath the aluminium box bottom right for the same reason. A few of the can electrolytics had failed. These were replaced with new smaller ones underneath, but the originals were left in so it looked original. The big square double capacitor on the top had physically bursted, so I made a new one from wood and painted it accordingly. Inside were two new capacitors. I took as many of the nuts and bolts from the front panel as I could, and turned the heads up to shiny metal on the lathe. Those I couldn't get out, I painted black! Polished all the front panel brass studs up as well. I enjoyed the exercise, but wouldn't fancy doing it again - I was pretty fed up with it by the time I finished. When complete, it was very lively on all bands, but not much morse about these days!
Attachments
R1155 before restoration (Large).jpg
R1155 as purchased
R1155 After restoration.jpg
R1155 after restoration

 
Posts: 1931
Joined: Mon Jul 25, 2011 12:12 pm
Location: Burghfield, Reading, UK

Re: R1155

Post by Brianc » Mon Mar 10, 2014 11:19 am

I like you idea of leaving the Jones plugs underneath the new metal box. A splendid looking set now!

 
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Joined: Tue May 01, 2012 11:23 am

Re: R1155

Post by turretslug » Thu Mar 13, 2014 10:49 am

Really nice sympathetic work there, I like the idea of making something useful, workable and safe- particularly difficult with a set like this that was very much part of aircraft systems, using complex harness with specialist connectors, external PSU etc. I don't suppose there was ever an "attractive" comms receiver, the politest thing that could be said about the likes of the Murphy B40 is that it has "character" but the R1155 is definitely an icon that most people would recognise as a "radio". Of course, if a set is particularly rare, significant or mint, the glass case treatment is the order of the day but I very much like the stuff I have to be working and used- if nothing else, being powered for several hours every now and then must chase the damp out of wound components, keep capacitors from deteriorating and so on.

I expect we've all come across slightly stomach-turning things, like bare mains just butt-soldered onto the 5-pin power connector on a CR100- anyone who's ever had kids around the house knows that they WILL be curious and meddle with things! I always try to imagine explaining exactly why I hadn't spent a few minutes making something as safe as possible before it was too late...

 
Posts: 201
Joined: Wed Mar 05, 2014 7:52 pm
Location: Lancashire

Re: R1155

Post by Sparks » Mon Mar 17, 2014 5:43 pm

Thanks you. The thing I found most annoying about this particular model was the slow motion tuning control. It seemed like I had to turn it 20 times to make the dial pointer move 1/8 inch, and initially, I thought there was something wrong with it. On reading it up, I discovered it was an early design fault and the RAF operators complained it was rather too slow if wearing heavy gloves and it was later rectified. I eventually took the works out and put the central knob on the capacitor spindle and it was a lot better then. When I eventually passed the receiver on, I gave the new owner all the pieces of the slow motion drive so that they could be replaced if necessary. The PSU plugged into the three way socket on the front and the jack socket was for the speaker. The red socket below that was the aerial connection.
Bob


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